1.ISO 9001 Certified Custom Flange Factory
2.Professional Technical Team to Provide Support
3.Finalize Your Order Faster
4.Perfect Quality Assurance Service.
5.Finalize Flange Machining at a Lower Price.
HULK Metal delivers precision custom flange machining based on your drawings, using advanced 3-, 4-, and 5-axis CNC equipment in ISO 9001-certified factories. Our technical team ensures accurate interpretation of specs, tight tolerances, and consistent quality—so you get reliable CNC flanges on time, every time, with full OEM support and competitive pricing.
HULK Metal’s custom flange machining follows your exact drawings, using materials like carbon steel, stainless steel, alloy steel, iron, and aluminum. We offer full CNC processes—turning, milling, drilling, grinding, and more—plus forging and precision finishing. Flanges include weld neck, slip-on, blind, threaded, and socket weld types. Every part undergoes rigorous checks: chemical composition, mechanical properties, dimensional accuracy, and surface quality. Surface treatments such as galvanizing, passivation, or polishing are available. Packaging and logistics are tailored to your needs, backed by lifelong quality assurance and responsive after-sales support.
Name | Custom Flange Machining |
Manufacturing Methods | Manufacturing According to Drawings |
Raw Materials | Iron, Steel, SS (Stainless Steel),Alloy Steel, Aluminum |
Process | Forging, Cutting. CNC Machining: Turning, milling, polishing, grinding, drilling, and reaming, and so on Packaging, Delivery, After Service. |
Surface Treatment | Galvanized, Passivation, Powder Coating, Shot Blasting, Polishing, Anodizing, etc. |
Types | Weld Neck Flange, Slip-On Flange, Socket Weld Flange,Threaded Flange,Blind Flange. |
Test Content & Data | 1.Chemical Composition; 2. Mechanical Properties; 3. Inspection of appearance, size, shape, and position tolerance; 4. Surface Quality; |
Packaging | Wooden case / Carton / Bulk / Individually Packaged / Customized |
Service | Freight consulting / Quality inspection / After-sales / Other value-added services. |
Delivery Method | Sea / Air / Land |
Quality Assurance | Life Long |
HULK Metal delivers high-precision flange machining tailored to your exact drawings, offering a full range of custom flange types—including weld neck, slip-on, blind, threaded, and socket weld—in materials like carbon steel, stainless steel, and alloy steel. Our ISO 9001-certified factories use advanced 3-, 4-, and 5-axis CNC equipment to hold tight tolerances, supported by rigorous quality control, diverse surface treatments, and a seamless supply chain. From engineering review to global delivery and after-sales support, we ensure reliable, cost-effective solutions for industrial buyers worldwide.
Flange machining is a critical process in industrial piping systems, where even minor deviations can lead to leaks, misalignment, or system failure under pressure. At HULK Metal, we approach flange machining with rigorous attention to material selection, process control, dimensional accuracy, and real-world application requirements.
We machine flanges from a wide range of materials, including carbon steel (A105, Q235), stainless steel (304, 316, 316L), alloy steel (F22, F91), ductile iron, and aluminum—each chosen based on corrosion resistance, temperature tolerance, and mechanical strength needed for your specific environment. Material certification and traceability are standard practice across all our ISO 9001-certified factories.
The machining process begins after raw stock is prepared—often via forging for high-pressure applications—to ensure grain flow aligns with the flange geometry, enhancing structural integrity. From there, our CNC centers perform turning, milling, drilling, reaming, and grinding operations in tightly controlled sequences. For example, bolt hole patterns are drilled using coordinate-guided toolpaths to maintain angular accuracy, while face finishes (e.g., serrated, smooth, or RTJ grooves) are machined to meet ASME B16.5 or custom surface roughness specs (typically Ra 3.2 μm or finer).
Bore diameter: ±0.02 mm
Face flatness: ≤0.1 mm over 300 mm
Bolt hole positional tolerance: ±0.1 mm
Raised face height: ±0.2 mm
Common challenges in flange production include warping during heat treatment, inconsistent surface finishes, and mismatched facing between mating flanges. To address these, we implement stress-relief annealing when needed, use sharp carbide tooling with optimized feed rates, and conduct in-process inspections—not just final checks. Our quality team verifies critical dimensions with CMMs and optical comparators, ensuring every CNC flange matches both your drawing and functional intent.
Another frequent issue is miscommunication on standards (e.g., PN vs. Class ratings). Our technical team reviews every drawing upfront to clarify pressure class, facing type, material grade, and testing requirements—preventing costly rework before production even starts.
Whether you need a standard weld neck flange or a complex custom design with integrated features, our integrated workflow—from engineering review to packaging—ensures consistent, high-integrity results. And if a part doesn’t meet spec? We replace it, no questions asked.
Producing high-quality custom flanges requires a structured, step-by-step workflow—from initial process planning to final delivery and support. At HULK Metal, we follow a disciplined manufacturing sequence that ensures precision, repeatability, and full compliance with your technical specifications. Each stage is managed by experienced teams in ISO 9001-certified factories, guaranteeing consistent output for even the most demanding applications.
Before any metal is cut, our engineering team analyzes your drawing to select the optimal manufacturing route. For standard pressure-class flanges, forged blanks are typically used to ensure structural integrity under load. For low-pressure or non-critical applications, cut plate or bar stock may suffice. We evaluate factors like material type, dimensional complexity, required tolerances, and volume to decide between forging + CNC machining or direct CNC fabrication—ensuring cost efficiency without sacrificing performance.
Custom flanges often require dedicated jigs, fixtures, or modular workholding systems to maintain accuracy during machining. Based on your drawings, our tooling engineers design fixtures that securely locate and clamp the workpiece while allowing full access to critical features. These are manufactured in-house and tested during trial runs to verify repeatability and stability. Any vibration, deflection, or misalignment is corrected before mass production begins—preventing scrap and ensuring consistent geometry across all parts.
We source raw materials only from vetted suppliers with certified mill test reports (MTRs). Upon arrival at the factory, every batch undergoes incoming inspection: chemical composition verification via spectrometer, visual checks for surface defects, and dimensional validation. Materials like stainless steel or alloy grades are also checked for proper heat treatment condition. This step eliminates material-related failures early and ensures traceability throughout production.
Once setup is approved, full-scale production begins using advanced 3-, 4-, and 5-axis CNC machines. Operators follow standardized work instructions, and in-process checks occur at defined intervals—monitoring key dimensions like bore, face flatness, and bolt circle diameter. Our factories maintain strict process controls, including tool wear tracking and coolant management, to sustain quality over thousands of parts without drift.
After machining, every flange undergoes final inspection per your requirements. This includes dimensional checks with CMMs or optical comparators, surface roughness testing, visual examination for burrs or tool marks, and—if specified—non-destructive testing (NDT) or pressure testing. Inspection data is recorded and available upon request, providing full transparency and confidence in conformance.
Flanges are cleaned, coated (if needed), and packaged according to your instructions—whether in wooden crates for ocean freight, anti-rust paper for long-term storage, or individually wrapped for sensitive finishes. Our logistics team coordinates sea, air, or land shipment with real-time tracking, ensuring on-time delivery anywhere in the world.
Our commitment doesn’t end at delivery. If any issue arises—dimensional discrepancy, surface defect, or shortage—we respond immediately with replacements, exchanges, or restocking. Our technical and customer service teams stay engaged to resolve concerns quickly, minimizing downtime for your operations.
HULK Metal has successfully machined a wide range of custom flanges for industries including oil & gas, chemical processing, power generation, and shipbuilding. From standard ASME designs to highly specialized configurations, our CNC capabilities and material expertise ensure every flange meets exact dimensional, pressure, and surface requirements—on time and to print.
Flange Type | Description |
Weld Neck Flange | The weld neck flange features a long tapered hub that transitions smoothly into the pipe wall, providing excellent stress distribution and fatigue resistance. We commonly machine these from forged carbon or stainless steel (e.g., ASTM A105, F304) for high-pressure, high-temperature applications. Our CNC process ensures precise bevel angles (typically 30°–37.5°), accurate bore alignment, and consistent raised face or RTJ grooves. Tolerances on hub diameter and length are held within ±0.1 mm. These flanges are ideal for critical services where leakage cannot be tolerated—such as refineries or offshore platforms—and we’ve delivered thousands with full MTRs and dimensional reports. |
Slip-On Flange | Slip-on flanges are cost-effective solutions where moderate pressure and temperature conditions exist. They slide over the pipe end and are welded internally and externally. At HULK Metal, we produce them in sizes from ½" to 48", using materials like Q235B, SS304, or A105. Key machining focuses include counterbore depth, face flatness (≤0.15 mm), and bolt hole concentricity. Because they’re thinner than weld neck types, we pay close attention to distortion during cutting and finishing. Surface treatments like hot-dip galvanizing or passivation are applied per request. Their simplicity makes them popular in water treatment, HVAC, and low-pressure steam systems—applications where ease of installation matters. |
Socket Weld Flange | Designed for small-bore, high-pressure piping (typically under 2"), socket weld flanges feature a recessed area into which the pipe is inserted before fillet welding. We machine these with tight control over socket depth and diameter to ensure proper pipe fit-up—critical for avoiding weld gaps. Common materials include 316 stainless steel and alloy steel F22. Our 5-axis CNC centers handle complex internal geometries while maintaining concentricity between the socket and sealing face. These flanges are widely used in hydraulic systems, instrumentation lines, and chemical sampling loops where space is limited but reliability is essential. Every batch undergoes visual and dimensional inspection to prevent interference issues during field assembly. |
Threaded Flange | Threaded flanges connect to pipes via NPT or BSPT threads, eliminating the need for welding—ideal for explosive environments or where future disassembly is expected. We cut internal threads to Class 2B tolerance using precision tapping cycles, ensuring smooth engagement without galling. Materials range from carbon steel (for general service) to duplex stainless steel (for corrosive settings). Special care is taken to align thread axis with flange face perpendicularity (<0.1 mm deviation). We’ve supplied threaded flanges for natural gas metering stations, fire protection systems, and mining equipment. Anti-seize coatings or thread protectors are added during packaging to preserve integrity during shipping and storage. |
Blind Flange | Blind flanges seal the end of a piping system or vessel opening, often subjected to full system pressure without flow. Despite their simple appearance, they demand high structural integrity. We forge and machine them from solid rounds of A105, F316, or F91, depending on service conditions. Critical dimensions include outer diameter, thickness (±0.2 mm), and bolt circle accuracy. Face finishes—flat, raised, or RTJ—are machined to match mating flanges precisely. We’ve produced blind flanges up to 60" diameter for hydrotest closures and reactor manways. Each undergoes ultrasonic testing upon request and is marked with heat number, size, and rating for traceability—ensuring safety in shutdown or isolation scenarios. |
HULK Metal offers a comprehensive range of surface treatments for custom flanges, tailored to enhance corrosion resistance, wear performance, appearance, or compatibility with sealing systems. Our partner factories apply proven methods across electrochemical, chemical, mechanical, electrostatic, and physical categories—ensuring your flanges perform reliably in harsh industrial environments.
Category | Surface Treatment | Description |
Electrochemical | Passivation | Removes free iron from stainless steel surfaces using nitric or citric acid baths, restoring the natural chromium oxide layer. This non-coating process enhances corrosion resistance without altering dimensions—critical for flanges in pharmaceutical, food processing, or marine applications. We follow ASTM A967 standards, with optional copper sulfate testing for validation. No hydrogen embrittlement risk, making it ideal for high-strength alloys. Parts are thoroughly rinsed and dried to prevent water spotting. Passivation is often specified alongside electropolishing for maximum cleanliness in hygienic systems. |
Anodizing | Primarily for aluminum flanges, anodizing grows a controlled oxide layer via electrolytic process in sulfuric acid. The resulting porous surface can be dyed (e.g., black, blue) and sealed for UV and abrasion resistance. Hard anodizing (Type III per MIL-A-8625) achieves 25–50 μm thickness with Rockwell C hardness up to 60—suitable for offshore or aerospace fittings. Dimensional change is minimal (<0.01 mm per surface), preserving tight tolerances. We ensure uniform coating even on complex geometries like bolt holes and recessed faces. | |
Chemical | Phosphating (Zinc/Iron Phosphate) | Creates a micro-crystalline conversion coating that improves paint adhesion and mild corrosion resistance. Often used as a pre-treatment before powder coating on carbon steel flanges. The process involves immersion in phosphate solution at controlled temperature and time, followed by passivation rinse. While not a standalone barrier, it significantly extends service life when combined with topcoats in industrial or agricultural machinery. We verify coating weight (e.g., 2.5–4.0 g/m² for zinc phosphate) per ISO 9717. |
Galvanizing (Hot-Dip) | Immerses cleaned steel flanges into molten zinc (450°C), forming a metallurgically bonded Zn-Fe alloy layer topped by pure zinc. Provides decades of outdoor corrosion protection—even at cut edges. Coating thickness typically ranges from 50–100 μm per ASTM A123. Ideal for structural, water, or utility flanges exposed to weather. Post-galvanizing, we perform centrifuge spinning to clear bolt holes and face surfaces, ensuring mating integrity. Slight dimensional growth (0.1 mm) is accounted for during machining. | |
Electrostatic | Powder Coating | Dry powder (epoxy, polyester, or hybrid) is electrostatically sprayed onto grounded flanges, then cured at 160–200°C to form a durable, uniform film (60–120 μm thick). Offers excellent chemical, UV, and impact resistance—common for chemical plant or wastewater flanges. Colors and textures (gloss, matte, wrinkled) are customizable per RAL codes. Unlike liquid paint, it produces no VOCs and fully encapsulates edges. We mask critical sealing surfaces unless coating is required there. Adhesion is tested per ASTM D3359. |
Mechanical | Shot Blasting | Propels angular steel grit at high velocity to clean, descale, and roughen flange surfaces. Prepares substrates for painting or galvanizing while removing mill scale, rust, or weld spatter. Achieves Sa 2.5 cleanliness per ISO 8501-1—near-white metal finish. Also induces compressive stress, improving fatigue life in dynamic applications. Used on carbon steel weld neck or blind flanges before final coating. Surface profile (Rz 40–75 μm) is measured to ensure optimal anchor pattern for subsequent layers. |
Polishing | Mechanical smoothing using abrasive belts, wheels, or buffing compounds to achieve reflective or satin finishes. For stainless steel flanges in food, beverage, or semiconductor industries, we offer Ra ≤0.8 μm (mirror finish) or Ra 0.8–3.2 μm (brushed). Done post-machining to avoid compromising dimensional accuracy. Polishing removes micro-burrs and enhances cleanability—critical where bacterial buildup must be prevented. Final inspection includes visual uniformity and surface roughness verification with profilometers. | |
Physical | Vacuum Plating (PVD) | Physical Vapor Deposition deposits thin, hard coatings (e.g., TiN, CrN) in a vacuum chamber via sputtering or arc evaporation. Used for specialty flanges requiring extreme wear or decorative gold/black finishes. Coatings are 1–5 μm thick, maintaining tight tolerances while offering hardness up to 2,500 HV. Common in high-end instrumentation or architectural piping. Excellent adhesion and temperature stability up to 600°C. Environmentally clean process with no liquid waste. |
Sourcing custom flanges from China can deliver significant cost and scalability advantages—but only if you partner with a supplier that combines technical competence, reliable processes, and full-service support. Not all factories are created equal. Below are critical factors to evaluate before placing your order.
A capable technical team doesn’t just read drawings—they interpret intent. They’ll spot ambiguities in tolerances, flag incompatible material-grade combinations, or suggest design tweaks to improve machinability without compromising function. At HULK Metal, our engineers review every print before quoting, ensuring your CNC flange is manufacturable to spec from day one. This proactive approach prevents costly errors during production and avoids delays caused by back-and-forth clarifications later.
High-volume orders demand more than just a few CNC machines. Look for a partner with scalable resources: multiple 3-, 4-, and 5-axis machining centers, dedicated forging or cutting lines, and buffer capacity to handle urgent runs. Our network includes ISO-certified factories equipped to produce thousands of flanges per month across sizes from ½" to 60". This scale ensures consistent lead times—even during peak seasons—without sacrificing quality or attention to detail.
ISO 9001 certification is a baseline, not a luxury. It means documented procedures govern everything from raw material intake to final inspection. In practice, this translates to traceable heat numbers, calibrated measuring tools, in-process checks, and rejection protocols for out-of-spec parts. Without such a system, “quality” becomes subjective. We enforce statistical process control (SPC) on critical dimensions and provide full inspection reports upon request—giving you confidence in every shipment.
A strong factory isn’t isolated—it’s connected. Reliable access to certified raw materials (e.g., ASTM-compliant steel mills), in-house tooling capabilities, surface treatment partners, and packaging solutions reduces dependency on third parties and minimizes risk. HULK Metal’s integrated supply chain—from material sourcing to post-machining finishes—ensures smoother workflows, faster turnaround, and fewer surprises due to external bottlenecks like coating shop delays or material shortages.
Technical support shouldn’t end at the quote. A true partner offers coordinated services: freight consultation, customs documentation, pre-shipment inspections, and responsive after-sales resolution. Our team includes sales, engineering, QA, logistics, and customer service specialists who communicate in real time. If a drawing revision arrives mid-production, we adapt quickly. If a container is delayed, we track it and update you—because your success depends on seamless collaboration, not just parts in a box.
Flexibility in commercial terms reflects operational maturity. Reputable suppliers accommodate standard international practices like T/T (telegraphic transfer), L/C (letter of credit), or DP (documents against payment), along with Incoterms such as FOB, CIF, or DAP. This allows you to align procurement with your financial controls and risk preferences. HULK Metal works with your preferred structure—no rigid mandates—making transactions smoother and more predictable for both sides.
Your flanges must reach their destination intact and on schedule. A competent supplier coordinates multimodal transport—sea, air, or land—with experienced forwarders, proper export documentation, and real-time tracking. We’ve shipped custom flanges to North America, Europe, the Middle East, and Southeast Asia, using moisture-resistant packaging, fumigated wooden crates, and clear labeling per destination regulations. Whether it’s a single pallet or a full container, global delivery is handled professionally from factory gate to your dock.
Mistakes happen—but how a supplier responds defines reliability. Look for clear policies on returns, replacements, and restocking for defective or short-shipped items. HULK Metal guarantees that every batch meets your agreed specifications in both quantity and quality. If a flange fails dimensional checks or arrives damaged, we resolve it promptly—no disputes, no runaround. This commitment to accountability protects your project timeline and builds long-term trust.
We maintain a fully equipped in-house quality inspection center with calibrated tools like CMMs, optical comparators, surface roughness testers, and spectrometers. Every custom flange undergoes rigorous checks—from raw material verification to final dimensional and visual inspection—following a documented ISO 9001 quality assurance system. Inspection data is recorded per batch, ensuring full traceability and consistent conformance to your drawings.
Pricing depends on multiple factors: material type (e.g., stainless steel vs. carbon steel), dimensional complexity, required tolerances, surface finish, order volume, and packaging. Because we work directly with our own network of CNC machining factories—not middlemen—we eliminate markup layers and provide accurate, real-time quotes based on your exact specifications and current production capacity.
Our pricing always reflects high-quality manufacturing, but within that standard, we offer competitive rates due to efficient factory operations and material sourcing. Larger order quantities naturally reduce per-unit costs through economies of scale. Additionally, simplifying design features (e.g., standardizing hole patterns or reducing tight tolerances where function allows) can further optimize cost without compromising performance.
Minimum order quantity varies based on flange size, material availability, setup complexity, and machining time. For small, simple flanges, we’ve accepted orders as low as 10–20 pieces. For large or highly customized designs, MOQ may be higher. Send us your drawing—we’ll sign an NDA—and we’ll evaluate feasibility and provide a clear MOQ along with lead time and cost.
Standard lead time is typically around 30 days from order confirmation, though it can range from 20 to 45 days depending on complexity, volume, and surface treatment requirements. High-volume repeat orders often move faster due to optimized tooling and workflow familiarity. We always confirm a realistic timeline upfront and keep you updated if any adjustments arise during production.
We offer a full spectrum of surface treatments—including galvanizing, passivation, powder coating, anodizing, shot blasting, and polishing—through trusted partner workshops integrated into our supply chain. The best finish depends on your flange’s material, operating environment, and sealing requirements. Our team will recommend the most effective, cost-efficient option to meet your corrosion resistance, appearance, or hygiene needs.
We regularly ship CNC flanges to more than 50 countries across Europe, North America, South America, Africa, the Middle East, and Southeast Asia. Our logistics team handles all export documentation, customs clearance support, and multimodal transport coordination—whether by sea, air, or land—to ensure smooth, trackable delivery to your facility anywhere in the world.
We’ve successfully produced flanges ranging from ½" to over 60" in diameter, including thick-walled high-pressure designs. Feasibility depends on material, forging or cutting method, machine bed size, and weight handling capacity. Share your 2D or 3D drawings with us (under NDA), and our engineering team will assess manufacturability, suggest any necessary adjustments, and confirm whether we can meet your size and performance requirements.
We accept common international payment methods including T/T (telegraphic transfer), L/C (letter of credit), and D/P. For delivery, we support standard Incoterms such as FOB, CIF, DAP, and EXW. If you have specific commercial or logistical preferences, just let us know—we’re flexible and experienced in structuring terms that align with your procurement policies and risk management strategy.
HULK Metal is not a trading company. We are a professional CNC flange service provider with deep integration into a network of ISO 9001-certified machining factories. Our in-house team includes engineers, procurement specialists, QA inspectors, and foreign trade professionals who manage every aspect—from technical review to shipment—ensuring seamless OEM production based strictly on your drawings.
Yes. After setting up tooling and fixtures, we produce a pre-production sample for your approval. This sample undergoes the same quality checks as mass-produced parts and is shipped to you for fit, function, or testing validation. Only after you confirm the sample meets all requirements do we proceed with full production—minimizing risk and ensuring first-time-right results.
A: You can get a quote in a shorter time by providing the following information at once:
1. 2D and 3D drawings of the Flange Machining. If neither is available, samples can be provided.
2. Quantity.
3. Delivery Terms.
4. Material, surface treatment, tolerance, and weight. If no 3D drawing is available, please provide the following information:
At HULK Metal, superior flange quality isn’t accidental—it’s the result of a disciplined, customer-centered approach that spans engineering, sourcing, production, and support. Here’s how we consistently deliver custom flanges that meet or exceed expectations.
Our professional technical team doesn’t just read your drawings—we interpret your intent. With years of experience across oil & gas, power, and chemical industries, our engineers identify critical features, potential manufacturing risks, and opportunities for optimization before production begins. This deep understanding allows us to propose smarter machining strategies, material choices, or tolerance allocations that align with your functional requirements—ensuring the final CNC flange performs exactly as needed in real-world conditions.
We’ve built a tightly integrated supply chain that connects certified raw material mills, precision machining factories, surface treatment partners, packaging specialists, and logistics providers. This vertical coordination eliminates handoff gaps, reduces lead time variability, and ensures consistent input quality. When every link is aligned under shared quality standards, the result is greater control over the entire production lifecycle—from steel coil to finished flange on your dock.
We source materials only from long-term partner mills that provide full mill test reports (MTRs) and comply with ASTM, EN, or GB standards. Because of our volume and stable relationships, we secure competitive pricing without compromising grade integrity. Every incoming batch undergoes strict inspection: chemical composition verification via spectrometer, visual defect checks, and dimensional validation. This dual focus on cost efficiency and material reliability forms the foundation of high-quality flange manufacturing.
In our ISO 9001-certified factories, production follows standardized work instructions with defined checkpoints. CNC programs are validated through first-article trials, tool wear is monitored systematically, and operators adhere to documented procedures for clamping, cutting parameters, and in-process measurement. Environmental factors like coolant concentration and machine calibration are also tracked. This level of discipline prevents drift and ensures every flange—whether the 1st or the 10,000th—is produced to the same exacting standard.
Quality isn’t checked only at the end—it’s verified at multiple stages. Final inspection includes dimensional accuracy (bore, face flatness, bolt circle), surface roughness, visual defects, and—when required—mechanical or chemical testing. We use CMMs, optical comparators, and calibrated gauges to validate conformance against your drawing. Full inspection reports are available upon request, giving you transparent, data-backed confidence in every shipment.
Even a perfect flange can be compromised by poor handling. We tailor packaging to your shipping method and destination: anti-rust paper for ocean freight, fumigated wooden crates for heavy loads, or individual wrapping for polished surfaces. Critical sealing faces are protected, and bolt holes are kept clear. Our logistics team coordinates multimodal transport with real-time tracking, ensuring your flanges arrive undamaged, on schedule, and ready for installation.
Your assurance continues after delivery. Upon receipt, you can verify both quality and quantity. Should any custom flange fail to meet agreed specifications—due to dimensional error, surface defect, or shortage—we offer prompt returns, exchanges, or restocking at no extra cost. Our responsive service team acts quickly to resolve issues, minimizing downtime and reinforcing trust. At HULK Metal, accountability isn’t a policy—it’s part of our promise.
At HULK Metal, quality control is embedded at every stage of custom flange production. We perform comprehensive inspections—including dimensional accuracy, surface integrity, material verification, and mechanical testing—using calibrated instruments in ISO 9001-certified environments. All data is documented and traceable. Pre-shipment checks confirm both quality and quantity, while custom inspection protocols ensure your specific requirements are fully met before delivery.
We verify critical dimensions such as bore diameter, face flatness, bolt hole position, thickness, and outer diameter using CMMs, optical comparators, and precision gauges. We regularly maintain and document tolerances as small as ±0.02 mm for each part or batch to make sure they fit well with other parts in your piping system.
Every flange undergoes visual and tactile examination for scratches, tool marks, burrs, or uneven finishes. Surface roughness is measured with profilometers (e.g., Ra ≤3.2 μm for standard faces), and sealing surfaces are checked under controlled lighting to detect micro-defects that could compromise gasket performance.
Before packing, a final audit confirms that all parts meet drawing specs, surface treatments are complete, markings are correct, and packaging matches shipping requirements. This gate ensures only approved goods leave our facility—reducing risk of field rejection.
Incoming raw materials are validated via spectrometer analysis to confirm chemical composition against grade specifications. Mill test reports (MTRs) are cross-checked, and positive material identification (PMI) is performed before machining begins to prevent material mix-ups.
When required, we conduct tensile strength, hardness, and impact tests based on material standards (e.g., ASTM A105 or F304). Samples are taken from the same heat batch as your order and tested in accredited labs, with full reports provided to confirm compliance with specified mechanical requirements.
If your project demands special checks—such as ultrasonic testing, dye penetrant inspection, or third-party certification—we integrate those into our QC plan. Just specify your requirements, and we’ll execute and document them as part of our formal inspection protocol.
We count and verify every piece against your purchase order during packing. For large batches, statistical sampling combined with digital tracking ensures accurate quantities. Shortages or extras are flagged immediately, guaranteeing you receive exactly what was ordered.
HULK Metal partners with ISO 9001-certified factories in China equipped with advanced CNC machining centers, dedicated surface treatment lines, and fully staffed quality control labs. Our integrated production ecosystem ensures precise custom flange manufacturing—from raw material to finished product—with full traceability, rigorous testing, and consistent adherence to international standards. This vertical coordination enables faster turnaround, tighter quality control, and reliable support for global industrial buyers.
Choosing HULK Metal means partnering with a reliable, technically capable supplier that delivers high-precision custom flanges on time and to spec. We offer a complete OEM solution—from engineering review and CNC machining to surface treatment, inspection, and global shipping—backed by ISO 9001-certified factories, competitive pricing, and responsive support. The result? Fewer headaches, faster project completion, and consistent quality you can trust.
Explore our collection of in-depth articles on flange machining, covering topics like material selection, tolerance control, surface treatment options, common manufacturing challenges, and how to choose the right CNC flange supplier in China. Whether you’re an engineer, procurement specialist, or project manager, these practical insights help you make informed decisions and avoid costly mistakes in your industrial piping projects.
Beyond flanges, HULK Metal produces a wide range of precision-machined metal components—including valve bodies, pump housings, shafts, couplings, manifolds, brackets, and hydraulic fittings—across industries like energy, automotive, aerospace, and heavy machinery. All parts are manufactured to print using advanced CNC turning, milling, and grinding processes, with full material traceability and quality assurance. Let us handle your complex metal parts with the same reliability as your custom flanges.
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Surface Anodized / Passivated / Polished / Powder Coating / Brushed / Customized
Aluminum Alloy 6063 / Customized
Profile Extrusion / Cutting / Deburring / CNC Process / Customized
Air conditioner / Frequency Converter / Communication Base Station / Computer / Electric Equipment / Customized
CE / ISO / RoHS / SGS / Customized
Anodizing / Sand Blasting / Painting / Chormating / Customized
Trademark printing / wooden box / plastic box / foam box / air film / Customized
Die Cast Aluminum Enclosures are widely used to protect electronic and industrial components in demanding environments.
We manufacture bike parts strictly according to customer drawings, covering drivetrain, braking, wheel, and structural components. Our OEM service integrates casting, CNC machining, surface treatment, packaging, and logistics under one managed process.
Name Aluminum Die Casting Washing Machine Bracket
Manufacturing According to Drawings
Materials Al-Mg Alloy / Al-Zn Alloy / Al-Si Alloy / Customized
Surface Anodized / Passivated / Polished / Powder Coating / Brushed / Customized
HULK Metal provides OEM Precision Die Casting Parts with full technical support, strict quality control, and reliable production.
HULK Metal delivers high-quality OEM casting aluminum brackets made to your exact drawings, using die casting, sand casting, or investment casting.
HULK Metal provides comprehensive Aluminium Die Casting Auto Parts solutions, covering engine, transmission, chassis, and electronic components. We meticulously manage every stage, from mold design, die casting, CNC machining, and surface treatment, to strict quality control, packaging, and delivery.
HULK Metal has provided excellent Agricultural Machinery Casting services to hundreds of customers worldwide.
HULK Metal supplies Automobile Casting Components for global automotive manufacturers and bulk buyers seeking reliable OEM partners in China. With ISO 9001 certified factories and mature casting experience, we produce Automobile Casting Parts strictly according to drawings.
HULK Metal specializes in OEM/ODM casting of Custom Flail Mower Hammer Blades. With an ISO 9001-certified factory, advanced foundry capabilities, and end-to-end quality control, we deliver wear-resistant, dimensionally accurate blades tailored to your machinery.
Aluminum Alloy 6063 / Customized
Profile Extrusion / Cutting / Deburring / CNC Process / Customized
Air conditioner / Frequency Converter / Communication Base Station / Computer / Electric Equipment / Customized
CE / ISO / RoHS / SGS / Customized
Anodizing / Sand Blasting / Painting / Chormating / Customized
Trademark printing / wooden box / plastic box / foam box / air film / Customized
Die Casting Engine Parts are widely used in automotive and industrial power systems where strength, accuracy, and heat dissipation matter.
HULK Metal is a trusted manufacturer of Custom Sickle Guards Casting, serving bulk buyers worldwide. Our ISO 9001-certified foundry delivers high-precision sickle guards in ductile iron, grey iron, or cast steel—tailored to your drawings.
HULK Metal delivers precise and durable Water Glass Sand Casting components for industrial and OEM applications. Combining advanced factories, CNC machining, comprehensive surface treatments, and rigorous quality control, we ensure reliable production and timely delivery.
Our Stainless Steel Castings are produced for demanding industrial applications where strength, corrosion resistance, and consistency matter. As an OEM-focused supplier, we manufacture strictly according to your drawings using sand casting, investment casting, or lost foam casting.
Resin sand casting is widely used for medium and large metal parts requiring good surface finish and stable structure.
HULK Metal provides professional reducer housing casting services, offering horizontal, vertical, integral, and split designs. Our complete OEM solutions include casting, CNC machining, surface treatment, quality inspection, packaging, and global delivery.
Name Precision Casting Castings
Manufacturing Methods Manufacturing According to Drawings
Materials Cast Iron / Aluminum / Stainless Steel / Carbon Steel / Gray Iron / Customized
Process Investment Casting / Ceramic Mold Casting / Metal Mold Casting, Die Casting, Lost Foam Casting
Surface Treatment Sandblasting / Shot Blasting / Powder Coating / Customized
Test Content & Data 1. Chemical composition; 2. Mechanical properties; 3. Metallographic inspection; 4. Inspection of appearance, size, shape, and position tolerance; 5. Surface roughness;
HULK Metal operates as a trusted Casting Motorcycle Parts manufacturer in China, specializing in aluminum die casting and sand casting motorcycle parts. Backed by ISO 9001 standards, our factories deliver precision OEM components tailored to your drawings.
Lost wax casting is ideal for producing complex metal parts with smooth surfaces and tight tolerances. As an experienced lost wax casting foundry in China, HULK Metal provides reliable OEM services based on your drawings.
HULK Metal provides comprehensive lost foam casting solutions for OEM projects, covering mold design, casting, CNC machining, surface treatment, and quality inspection.
Investment casting produces complex metal parts with smooth surfaces and tight tolerances through a precise lost wax process.
HULK Metal delivers ISO 9001-certified grey iron casting services with precision, durability, and cost efficiency.
HULK Metal has provided excellent metal casting services to hundreds of ductile iron casting parts purchasers around the world. More than 20 industries, including automobile manufacturing, machinery manufacturing, home appliance manufacturing, construction, agriculture, and energy, have used our products.
HULK Metal delivers high-quality custom cast iron drain pipe fittings through ISO 9001-certified factories. Our experienced team ensures precise production from drawings, rigorous quality control, and timely delivery.
You will get higher quality Centrifugal Casting Castings. HULK Metal has an advanced centrifugal casting production line that can produce cast iron, gray iron, ductile iron, stainless steel, high manganese steel and other raw materials.
HULK Metal has provided excellent metal casting services to hundreds of Cast Iron Casting parts purchasers around the world. Our products have been used in more than 20 industries, such as automobile manufacturing, machinery manufacturing, home appliance manufacturing, construction industry, etc.
Custom forged parts from HULK Metal offer superior strength, reliability, and performance across industries like automotive, construction, and energy. Using advanced forging techniques and a comprehensive quality control system, we provide parts made to your exact specifications.
Closed die forged parts are produced by shaping heated metal within precision dies, delivering higher strength, consistent grain flow, and tight tolerances.
HULK Metal’s forged components include manufacturing processes, materials, surface treatments, and quality control measures. From automotive to industrial applications, our forged components deliver superior performance and reliability
Manufacturing According to Drawings
Process Casting / Forging / Stamping
CNC Machining Turning, Milling, Planing, Drilling, Grinding, Drilling, Boring
Materials 304 / 316L / Aluminum Alloy / Customized
Manufacturing According to Drawings
Process Casting / Forging / Stamping
CNC Machining Turning, Milling, Planing, Drilling, Grinding, Drilling, Boring
Materials Carbon Steel / ND Steel / Stainless Steel / Aluminum Alloy / Customized
Manufacturing According to Drawings
Process Casting / Hot Forging
CNC Machining Turning, Milling, Planing, Drilling, Grinding, Drilling, Boring
Materials Carbon Steel / ND Steel / Stainless Steel / Aluminum Alloy / Customized
HULK Metal specialises in high-quality forged stainless steel parts and offers comprehensive OEM services. As a certified ISO 9001 factory in China, we ensure strict quality control, competitive pricing, and rapid order turnaround.
Name Motorcycle Parts Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Aluminum / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Manufacturing According to Drawings
Process Hot Forging / Die Forging / Custom
CNC Machining Turning, Milling, Planing, Drilling, Grinding, Drilling, Boring
Materials Carbon Steel / ND Steel / Stainless Steel / Aluminum Alloy / Customized
Name Motorcycle Accessories Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Aluminum / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Name Mining Machinery Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Die Forging / Customized
Custom hot forging parts are produced through controlled heating, precision die forging, machining, inspection, and delivery. HULK Metal supports OEM projects based on drawings, combining experienced technical teams, coordinated factories, and ISO 9001 management.
Name Cold Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials 20Cr Steel / 20CrMo Steel / 20CrMnTi Steel /Aluminum / Aluminum Alloy / Customized
Process Cold Forging
Carbon Steel Forged Parts are widely used in applications where strength, durability, and dimensional stability are important. HULK Metal supplies Custom Carbon Steel Forged Parts through full OEM services, from drawing review, forging, machining, surface treatment to delivery.
Name Bicycle Accessories Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Aluminum / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Name Auto Parts Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Aluminum / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Name Auto Accessories Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Aluminum / Customized
Process Hot Forging / Cold Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Name Alloy Steel Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Alloy Steel
Process Hot Forging / Free Forging / Mold Forging / CNC Machining / Rilling Forging / Die Forging / Customized
Name Agricultural Machinery Accessories Forging Parts
Manufacturing Methods Manufacturing According to Drawings
Materials Carbon Steel / Alloy Steel / Stainless Steel / Customized
Process Hot Forging / Free Forging / Mold Forging / CNC Machining / Customized
HULK Metal is a manufacturer of sheet metal stamping parts in China. We have advanced stamping equipment, experienced workers, and perfect after-sales service to complete higher-quality orders faster at a lower price.
HULK Metal is committed to providing high-quality sheet metal automotive parts OEM services to customers around the world. We have a complete supply chain to provide you with better OEM services.
HULK Metal has developed over 16 years to become an experienced metal stamping manufacturer. We can manufacture higher quality steel metal stamping parts from carbon steel, stainless steel, and alloy steel. We have a complete quality control system.
HULK Metal has provided excellent metal stamping services to hundreds of stainless steel metal stamping parts purchasers around the world. Our products have been used in more than 20 industries, such as automobile manufacturing, machinery manufacturing, home appliance manufacturing, construction industry, etc.
HULK Metal is a professional manufacturer of home appliance metal stamping parts that has provided metal stamping services for the home appliance manufacturing industry for over 16 years.
Aluminum Alloy 6063 / Customized
Profile Extrusion / Cutting / Deburring / CNC Process / Customized
Air conditioner / Frequency Converter / Communication Base Station / Computer / Electric Equipment / Customized
CE / ISO / RoHS / SGS / Customized
Anodizing / Sand Blasting / Painting / Chormating / Customized
Trademark printing / wooden box / plastic box / foam box / air film / Customized
As a metal stamping service supplier with a strong production capacity, HULK Metal has 5 sets of stamping machines with a capacity of 315 tons, 5 sets of 200 tons capacity, 5 sets of 80 tons capacity and 5 sets of 60 tons capacity. We can provide customized manufacturing services for copper metal stamping parts of 0.1mm~10mm. Products can be certified by CE, SGS, GB, and other standards.
HULK Metal has 20 precision stamping machines that can process precision metal stamping parts from 0.05mm to 5mm. Our quality inspection team will strictly test the performance and parameters of the product to ensure that the quality of the product can meet your requirements.
HULK Metal has provided excellent metal stamping services for more than 20 industries such as automobiles, home appliances, machinery, and other manufacturing or construction industries.
HULK Metal has an experienced technical team that can customize complete custom stamping parts OEM solutions. We can supply products certified by CE, SGS, etc. and comprehensive services such as shipping and after-sales. You can buy metal stamping parts you want more easily at HULK Metal.
HULK Metal provides Custom Construction Metal Stamping Services for bulk buyers who demand precision, strength, and consistency.
HULK Metal is a professional manufacturer of metal stamping parts. Our factory has more automated stamping machines and advanced product quality inspection instruments so that we can complete higher quality carbon steel metal stamping parts faster.
HULK Metal provides professional brass metal stamping services with full-process technical support and production capacity. We specialize in manufacturing custom brass metal stamping parts that meet CE, GB, and SGS standards.
HULK Metal's factory has 20 stamping machines, 10 CNC machines, and perfect-quality inspection instruments. We can provide complete OEM services for metal stamping parts. We can manufacture metal stamping parts in automobiles, construction, household appliances, and other industries with copper, steel, and aluminum as raw materials.
HULK Metal is a professional Auto Accessories Metal Stamping Parts manufacturer with over 16 years of experience. We have a complete supply chain to supply you with complete metal stamping OEM services.
HULK Metal has been engaged in the manufacture of Aluminum Sheet Metal Stamping Parts for many years. We focus more on the needs of our customers and develop complete production solutions accordingly.
HULK Metal has been engaged in the stamping service of aluminum metal parts since the second half of the 20th century. Up to now, HULK Metal has been able to produce metal stamping parts with a thickness of 0.1mm~2mm using 1000~7000 aluminum alloy plates as raw materials.
HULK Metal provides high-quality Aluminum CNC Machining Parts, combining advanced multi-axis CNC machining, precise surface treatments, and strict quality control.
Aluminum Alloy 6063 / Customized
Profile Extrusion / Cutting / Deburring / CNC Process / Customized
Air conditioner / Frequency Converter / Communication Base Station / Computer / Electric Equipment / Customized
CE / ISO / RoHS / SGS / Customized
Anodizing / Sand Blasting / Painting / Chormating / Customized
Trademark printing / wooden box / plastic box / foam box / air film / Customized
HULK Metal delivers high-precision CNC auto parts through ISO 9001-certified factories in China, offering full OEM machining services—from design review and material sourcing to surface treatment, rigorous inspection, and global delivery.
Name CNC Machining Aluminum Die Casting Parts
Manufacturing According to Drawings
Materials Al-Mg Alloy / Al-Zn Alloy / Al-Si Alloy / Customized
Surface Anodized / Passivated / Polished / Powder Coating / Brushed / Customized
Precision Machining for Agricultural Parts requires stable accuracy, durable materials, and consistent production control. HULK Metal provides Agricultural Sector Parts Machining Services based on customer drawings, covering turning, milling, drilling, and finishing.
Precision bicycle part machining demands tight tolerances, lightweight strength, and flawless surface finishes—exactly what HULK Metal delivers.
HULK Metal delivers precision custom flange machining based on your drawings, using advanced 3-, 4-, and 5-axis CNC equipment in ISO 9001-certified factories.
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Sewage Pump Impellers
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron pump impellers: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel pump impellers: precision casting, lost wax casting.
Powder spraying, Painting
Sewage Pump Housing
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Sewage Pump Housing: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Sewage Pump Housing: precision casting, lost wax casting.
Powder spraying, Painting
Sewage Pump Bases
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Sewage Pump Bases: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Sewage Pump Bases: precision casting, lost wax casting.
Powder spraying, Painting
Pipeline pump Motor Bracket
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Pipeline pump Motor Bracket: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Pipeline pump Motor Bracket: precision casting, lost wax casting.
Powder spraying, Painting
Pipeline Pump Impellers
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Pipeline Pump Impellers: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Pipeline Pump Impellers: precision casting, lost wax casting.
Powder spraying, Painting
Pipeline Pump Covers
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Pipeline Pump Covers: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Pipeline Pump Covers: precision casting, lost wax casting.
Powder spraying, Painting
Pipeline Pump Housings
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Pipeline Pump Housings: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Pipeline Pump Housings: precision casting, lost wax casting.
Powder spraying, Painting
Centrifugal Pump Impellers
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron pump impellers: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel pump impellers: precision casting, lost wax casting.
Powder spraying, Painting
1. Chemical composition; 2. Mechanical properties; 3. Metallographic inspection; 4. Inspection of appearance, size, shape, and position tolerance; 5. Surface roughness;
Centrifugal Pump Covers
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron pump covers 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel pump covers: precision casting, lost wax casting.
Powder spraying, Painting
Name Centrifugal Pump Bottom Plates
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron Centrifugal Pump Bottom Plates: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel Centrifugal Pump Bottom Plates: precision casting, lost wax casting.
Powder spraying, Painting
Manufacturing According to Drawings
QT (Ductile Iron) HT (Grey Cast Iron) Cast Steel (ZG25)
Gray cast iron, ductile iron pump Housings: 1. Resin sand casting; 2. Lost foam casting; 3. Coated sand casting;
Cast steel pump Housings: precision casting, lost wax casting.
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Ductile Iron / Stainless Steel / Gray Iron / Cast Steel / Customized
+/-0.01mm
CT9
Casting / CNC / Customized
≥1.6Mpa, ≤6.4Mpa
Painting / Plating / Polishing / Customized
Anti-collision / Brand Logo / Customized
CB / CE / URV / Customized
Our J Hooks and J Cups for Power Rack OEM services are designed for brands and wholesalers sourcing in volume. HULK Metal supports full-process manufacturing from drawings, covering stamping, welding, machining, and surface treatment under ISO 9001 control.
Fitness Equipment Extrusions are widely used for frames, rails, supports, and structural connectors in commercial gym equipment. HULK Metal provides OEM production covering extrusion forming, precision cutting, CNC machining, welding, and surface treatment.
HULK Metal provides Weight Plate Holder OEM services for global gym equipment brands and wholesalers seeking dependable large scale supply. From standard weight plate racks to custom bumper plate storage solutions, our factories support cutting, welding, bending, machining, and finishing under ISO 9001 systems.
Fitness Equipment Parts often involve complex structures, load-bearing requirements, and strict consistency standards. HULK Metal provides Custom Fitness Equipment Parts through OEM production, supporting drawings or samples.
Exercise equipment parts form the structural and functional backbone of modern fitness machines. HULK Metal offers OEM services focused on custom exercise equipment parts manufactured strictly to drawings.
HULK Metal crafts Custom Workout Equipment Parts to your exact drawings—no job too complex. With full in-house metal fabrication and strict ISO controls, we deliver stronger, smoother, and more consistent parts than typical suppliers.
HULK Metal Crafts Gym Equipment Components with tighter tolerances and heavier-duty builds than most. We handle OEM requests from start to finish—stamping, welding, laser cutting, and forging—all under one roof.
HULK Metal delivers high-quality custom barbell rack OEM services backed by decades of metal fabrication expertise. Our ISO 9001-certified factories handle everything from raw material sourcing to final delivery. Whether you need power racks, squat racks, or wall-mounted systems, we produce precise, durable parts that meet your exact specifications.
HULK Metal is a trusted OEM supplier of custom gym equipment rack and parts, backed by ISO 9001-certified factories and full-sheet metal production capabilities. We manufacture power racks, squat racks, wall-mounted systems, and more—exactly to your drawings.
HULK Metal produces custom power racks from iron, steel, stainless steel, and aluminum using sheet metal, profiles, pipes, and strips. Our processes include stamping, CNC machining, welding, casting, and forging.
As a top metalworking service provider, we want to let every customer experience a sense of security in purchasing, sales, etc., and better realize their value through continuously defining new standards for products and services.
Room 901, Intelligent Park A Building, No. 86 ChunYang Rd, Qingdao, China 266109
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