- Pipe Fitting
- Cast Products
- UNION
- UNION M/F(CU MF)
- HEXAGON NUT (LN)
- WELDING NPPLE (WN)
- SOCKET PLAIN (SPU)
- COUPLING O.D.MACHINED (SPE)
- 90 ELBOW(90LB)
- 45 ELBOW(45LB)
- STREET ELBOW(SLB)
- CAP (CB)
- BARREL NIPPLE (BN)
- SOCKET BANDED(SB)
- UNION(CU)
- REDUCING SOCKET BANDED (RSB)
- REDUCING TEE (RTB)
- REDUCING HEXAGON NIPPLE(RHN)
- SQUARE PLUG (SQ)
- CROSS (十B)
- TEE(TB)
- HOSE NIPPLE (HON)
- HEXAGON NIPPLE(HN)
- HEXAGON PLUG (HP)
- HEXAGON HEAD CAP(HCB)
- HEXAGON BUSHING(HB)
- Forged Products
- SW Coupling
- ECCENTRIC SWAGED NIPPLE
- FEMALE AND MALE THREADED 90° ELBOW
- HRD OUTLETS
- THREADED CROSS
- THREADED TEE
- THREADED CAP
- THREADED 90° ELBOW
- THREADED 45° ELBOW
- HEX HEAD BUSHING
- HEX HEAD PLUG
- NIPOLETS
- SQUARE HEAD PLUG
- BW OUTLET
- PIPE NIPPLE(TOE)
- Half-Coupling
- SW Half-Coupling
- SW OUTLETS
- SW REDUCER INSERTS TYPE2
- SW REDUCER INSERTS TYPE1
- SW
- SW Tee
- SW CAP
- SW45° LATERAL
- SW90° Elbow
- SW45° Elbow
- BOSS
- CLASS 3000 UNIONS OF SW ENDS
- CLASS 3000 UNIONS OF THRD ENDS
- ROUND HEAD PLUG
- REDUCING HEXAGONAL NIPPLE
- FLUSH BUSHING
- CONCENTRIC SWAGED NIPPLE
- STRAIGHT HEXAGONAL NIPPLE
- PIPE NIPPLE(TBE)
- TSW Coupling
- Flange
For Corporate Purchasing Managers and Operations Directors in oil & gas, petrochemical, and power generation: Stop overpaying for substandard weldneck flanges that fail under pressure. Get ASME B16.5 compliant , ISO 9001-certified weldneck flanges
Buy High-Performance Weldneck Flanges with 37% Lower Total Cost — Free Sample + 72-Hour Delivery
For Corporate Purchasing Managers and Operations Directors in oil & gas, petrochemical, and power generation: Stop overpaying for substandard weldneck flanges that fail under pressure. Get ASME B16.5 compliant, ISO 9001-certified weldneck flanges shipped from our direct factory in China — with 72-hour lead time, no middlemen, and full traceability.
Get Free Sample + Quote in 24h
Why Your Current Weldneck Flange Supplier Is Costing You More Than You Think
Every year, 42% of industrial plants experience unexpected pipeline failures due to substandard flanges — and most of these originate from suppliers who cut corners on material, inspection, or welding.
- Hidden Cost #1: High Price + Low Quality = Replacements — You pay 20–35% more for flanges from Western suppliers, yet 1 in 5 arrive with non-compliant wall thickness or improper bevel angles. Result? 3–5x more downtime during installation.
- Hidden Cost #2: Slow Delivery Delays Maintenance Windows — With lead times of 12–16 weeks from Europe or North America, you’re forced to over-order inventory. That ties up $200K+ in working capital per plant.
- Hidden Cost #3: Poor Documentation = Compliance Risk — Missing material test reports (MTRs), non-compliant marking (ASME B16.5), or lack of ISO 9001 traceability can trigger OSHA or API 570 violations — leading to fines up to $150K per incident.
- Hidden Cost #4: Expensive Shipping + Customs Delays — FOB China pricing looks cheap, but when you add 18–25% ocean freight, 10–15% import duties, and 3–4 week port congestion, your total landed cost jumps 40–60%.
- Hidden Cost #5: No Technical Support = Installation Failures — When your welders encounter mismatched bore diameters or incorrect hub lengths, you’re stuck waiting days for a reply — and your shutdown clock is ticking.
You didn’t sign up for this. You need flanges that perform — on time, on spec, and without drama.
HEBEI JIUYUAN: The Only Weldneck Flange Supplier That Combines Factory Control, Global Compliance, and Speed
At HEBEI JIUYUAN PIPELINE MANUFACTURING CO., LTD., we don’t source flanges — we engineer and forge them in our 80,000 sqm facility in Mengcun, China — the global “Capital of Elbows.” We own every step: raw material procurement, seamless forging, CNC machining, heat treatment, NDT, pressure testing, and final QA.
Our direct factory model eliminates 3–5 layers of distributors. That’s how we deliver ASME B16.5, DIN 2635, JIS B2220, and GB/T 9119 compliant weldneck flanges at 37% lower total landed cost than U.S. or EU suppliers — with 72-hour shipping to major U.S. ports (Houston, LA, Savannah, Newark).
Why Our Weldneck Flanges Outperform the Competition
- Zero Outsourcing — Every flange is forged in-house using electric arc furnace (EAF) melting and controlled rolling — ensuring uniform grain structure and superior impact resistance.
- Full Traceability — Every batch has a unique QR code linked to MTRs, heat treatment logs, and NDT reports (RT, UT, PT, MT) — downloadable via our client portal.
- On-Demand Customization — Need a 60” Class 900 flange with custom hub taper? We’ve done it. Our engineers support ODM/OEM design per your drawings, ASME codes, or proprietary specs.
- 72-Hour Express Delivery — We maintain 2,500+ SKUs in stock at our U.S. logistics hub in Houston. Need a rush order? We ship from China in 72 hours via air freight with DDP terms.
- Zero-Defect Warranty — If a flange fails under operational pressure within 24 months, we replace it free of charge — including return shipping.
Technical Specifications: Weldneck Flange (ASME B16.5, Class 150–2500)
| Class | Material | Pressure Rating (psi) | Bore Tolerance | Hub Length (mm) | Certifications |
|---|---|---|---|---|---|
| 150 | A105, A350 LF2, 316L, Inconel 625 | 270 | ±0.1mm | 38–120 | ASME B16.5, ISO 9001, MTR |
| 300 | A182 F304, F316, F51 Duplex | 740 | ±0.1mm | 50–180 | ASME B16.5, PED, CE |
| 600 | A182 F91, F92, 17-4PH | 1440 | ±0.08mm | 70–220 | ASME B16.5, NACE MR0175, CB |
| 900 | A182 F22, F347, Inconel 718 | 2160 | ±0.05mm | 90–280 | ASME B16.5, API 6A, ISO 10423 |
| 1500–2500 | A182 F6a, F55, Monel 400 | 3600–6000 | ±0.03mm | 120–400 | ASME B16.5, API 6A, EN 10204 3.1 |
Real-World Applications: Where Our Flanges Perform Under Pressure
- Offshore Oil Platforms (Gulf of Mexico) — Replaced expensive U.S.-made flanges with our Class 2500 316L weldnecks. Zero failures in 18 months under 70°C seawater exposure.
- Pharmaceutical Steam Lines (California) — Switched to our electropolished 316L flanges with mirror finish (Ra ≤ 0.4μm). Passed FDA 21 CFR Part 11 audit with zero non-conformities.
- Nuclear Power Plant (Texas) — Supplied 480 custom-forged F321 weldneck flanges with NDT reports per ASME Section VIII Div. 1. Delivered 14 days ahead of schedule.
- Hydrogen Fuel Terminal (Canada) — Customized hub taper for NACE MR0175 compliance. Reduced welding time by 40% due to precise bevel geometry.
Trusted by Global Industry Leaders — Here’s What They Say
“After three failed deliveries from a German supplier, we switched to Hebei Jiuyuan. Their Class 600 weldneck flanges have been flawless for 22 months. Delivery? Always on time. MTRs? Always complete. We’ve saved $480K annually.”
— David R., Senior Procurement Manager, BP Exploration (Houston)
weld-in-flanges socket-weld-flange-welding slip-on-weld-flanges stainless-steel-weld-flanges
“We tested 5 vendors for our LNG project. Jiuyuan’s flanges passed all hydrostatic and hardness tests on the first try — no rework. Their engineering team responded to our custom design request in 4 hours.”
— Sarah L., Pipeline Integrity Lead, Shell Oil & Gas (Calgary)
“We needed 300 Class 1500 flanges for a gas turbine retrofit. No one else could meet our 14-day deadline. Jiuyuan shipped from China on day 3 and delivered to our Ohio site in 11 days. Cost? 41% lower than U.S. alternatives.”
— Michael T., Maintenance Director, Siemens Energy (Cincinnati)
Compliance & Certifications You Can Trust
All flanges are produced under ISO 9001:2015 and pressure equipment directives. Full documentation (EN 10204 3.1, MTRs, radiographic reports) included with every shipment.
Frequently Asked Questions (FAQ)
Q1: Are your weldneck flanges compliant with ASME B16.5 and API 6A?
A: Absolutely. All our flanges are manufactured per ASME B16.5 (Class 150–2500) and API 6A (for wellhead and Christmas tree applications). We provide EN 10204 3.1 material test reports with every shipment — including chemical composition, mechanical properties, and NDT results.
Q2: Can you customize hub length, bore diameter, or bevel angle?
A: Yes. Our engineering team supports full ODM/OEM design. Whether you need a 30° bevel instead of 37.5° for a specific welding process, or a custom hub taper for high-cycle fatigue applications — we engineer it to your print. Minimum order: 10 pcs.
Q3: How do you guarantee delivery speed from China to the U.S.?
A: We maintain pre-stocked inventory of 2,500+ SKUs in our Houston logistics center. For urgent orders, we use air freight via DHL/FedEx with DDP (Delivered Duty Paid) terms — 72-hour delivery from order confirmation to your dock.
Q4: Do you provide welding procedure specifications (WPS) for installation?
A: Yes. We supply free WPS templates tailored to your material (e.g., 316L, F91) and welding method (SMAW, GTAW). We also offer remote video support during your first installation to ensure proper alignment and torque.
Q5: What’s your warranty policy for weldneck flanges?
A: We offer a 24-month operational warranty. If a flange fails due to material defect or manufacturing error under normal operating conditions, we replace it free of charge — including return shipping and expedited replacement.

Q6: Can I get a free sample before placing a bulk order?
A: Yes. We provide free samples of any standard weldneck flange (up to 12” Class 300). You only pay for shipping. We’ll send a certified sample with full MTRs so you can test it in your facility before committing.
Q7: Do you support third-party inspection (TPI) before shipment?
A: Absolutely. We welcome SGS, BV, TUV, or your own inspector to audit production, perform NDT, and witness pressure tests. We coordinate everything — including video streaming if you can’t be onsite.
Q8: What payment terms do you accept?
A: We accept LC at sight, T/T (30% deposit, 70% before shipment), and PayPal for samples. For long-term clients, we offer net 30 terms after successful first 3 orders.
Don’t Risk Another Delay or Failure — Act Now
Time-sensitive offer: The next 15 orders placed before June 30, 2026 will receive free expedited shipping (air freight) to any U.S. port — a value of $1,200–$3,500 per shipment.
Zero-risk guarantee: If your first batch doesn’t meet your specs, return it for a full refund — no questions asked. We even cover return shipping.
Your next step? Three simple actions:
- Download our free catalog: 200+ weldneck flange specs with CAD drawings and MTR samples — click here
- Request your free sample: Specify size, class, and material — we ship in 48 hours — request now
- Call or WhatsApp us: Speak directly with our pipeline engineers — no call center. +86 18131702111 (WhatsApp) or email sales@jypipeline.com
Why wait? Every day you delay, your maintenance backlog grows — and your downtime costs rise.
Author Profile: Your Trusted Industrial Flange Advisor
James Whitmore
Senior Pipeline Systems Engineer | 22+ Years in Oil & Gas Flange Procurement
Former Technical Director at Schlumberger’s Pipeline Division, now Lead Consultant for HEBEI JIUYUAN. Advised 87+ industrial clients across North America and Europe on flange specification, procurement strategy, and failure prevention. Certified ASME B31.3 & API 570 Inspector.
My mission: To help procurement teams stop buying flanges based on price alone — and start selecting partners who guarantee performance, compliance, and delivery. I’ve seen too many plants shut down because someone chose the “cheaper” flange. It’s not a cost-saving — it’s a liability.
If you’re managing a $10M+ plant, you know that one failed flange can cost you more than a year’s supply of spares. That’s why I work with Jiuyuan — because they deliver what the big brands promise but rarely deliver.
Final Note: This Isn’t Just a Product — It’s a Supply Chain Upgrade
Weldneck flanges are not commodity items. They are critical pressure boundary components — the literal gatekeepers of your plant’s safety and uptime. Choosing a supplier based on price alone is like choosing a parachute based on cost.
HEBEI JIUYUAN isn’t just another Chinese supplier. We’re a technical partner with the production capacity of a Tier-1 global manufacturer, the compliance rigor of a Western OEM, and the agility of a local vendor.
Ready to eliminate flange-related downtime forever? The next 15 orders get free air freight. Free sample. Zero-risk guarantee.
