Socket Weld Pipe Flanges

TYPE: RF, FF, RTJ, M&F, T&G. Material: A105, A350 LF2, A36, SS 400, A182 F11/F304/F316/F51/F53/F55 etc. Size: 1/2" ~ 60" Standard: ASME B16.5/B16.36/B16.47, API 6B/605, BS 3293/4504, EN 1092-1, JIS B2220, MSS SP-44 Pressure: CLASS 150 ~ CLASS 2500, PN 6 ~ PN 400 Flange Facing: RF, FF, RTJ, M&F, T&G. Customization: OEM/ODM service. Samples: Sample service available.

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Product Description

Xi 'An QinSteel Trading Co., Ltd | Premium Socket Weld Pipe Flanges Manufacturer & Global Supplier

When you need reliable, high-pressure pipeline solutions, Socket Weld Pipe Flanges from Xi'an QinSteel deliver unmatched performance. Engineered to ASME B16.5, API 6A, and EN 1092-1 standards, our flanges ensure leak-proof connections in oil and gas systems. With ISO 9001, API 6A, and PED certifications, we combine precision manufacturing with global compliance to keep your projects on track.

Product Description

The products create secure, permanent joints in high-pressure piping systems. Their unique socket design allows easy alignment and welding, minimizing turbulence and maximizing flow efficiency. Ideal for oil and gas pipelines, petrochemical plants, and offshore platforms, these flanges withstand extreme temperatures (from -29°C to 425°C) and pressures up to CLASS 2500.

Material Specifications

STANDARD	TYPE	SIZE	PRESSURE
ASME B16.5	WN, SO, SW, BLD, THREADED, LP	1/2" ~ 24"	CLASS 150 ~ 2500
ASME B16.36	WN, SO, THREADED	1/2" ~ 24"	CLASS 300LB ~ 2500
ASME B16.47	WN BLD	26" ~ 60"	CLASS 75 ~ 900
ASME B16.48	SPECTACLE BLANKS, SPADES, RING SPACERS	1/2" ~ 24"	CLASS 150 ~ 2500
AWWA C207	STEEL RING, BLD, STEEL HUB	4" ~ 96"	86 ~ 275 PSI
API 6A	WN, BLD, THREADED, INTEGRAL, TEST	2-1/16" ~ 20-3/4"	13.8 MPa ~ 138.0 MPa
API 605	WN	26" ~ 60"	CLASS 150 ~ 900
SANS 1123	WN, PLATE, SCREWED, SO, LOOSE, BLANK, INTEGRAL	DN 10 ~ 3600	250 ~ 4000 kPa
AS 2129	BLD, PLATE, BOSS, WN	DN 15 ~ 1800	TABLE A ~ TABLE T
BS 3293	SO, WN	26" ~ 48"	CLASS 150 ~ 600
BS 4504	PLATE, LOOSE, BLANK, WN, SO, THREADED, WO PLATE, INTEGRAL	DN 10 ~ 4000	PN 6 ~ 40
EN 1092-1	PLATE, LOOSE, BLIND, WN, SO, THREADED, WO PLATE, INTEGRAL	DN 10 ~ 3600	PN 6 ~ 400
JIS B2220	SOP, SOH, SW, WN, LJ, TR, IT, BL	DN 10 ~ 1500	5 ~ 63 K
MSS SP-44	BLD, WN	12" ~ 60"	CLASS 150,19.6bar ~ CLASS 900, 153.1 bar

Material Excellence

Choose from carbon steel (A105/A350 LF2), stainless steel (F304/F316), or duplex alloys (F51/F53) for Socket Weld Pipe Flanges. All materials come with full traceability and Mill Test Reports (MTRs). Need a custom grade? Our R&D team can develop specialized alloys for corrosive or high-temperature environments.

Why Our Socket Weld Pipe Flanges Stand Out?

✅ Zero-Defect Guarantee: Every flange undergoes hydrostatic testing, dimensional checks, and surface finish inspections.

✅ Global Compliance: Pre-validated for API, ASME, EN, JIS, and GOST standards.

✅ Customization Ready: Modify bore sizes, facing types (RF/RTJ/FF), or coatings (PTFE, galvanized) with MOQs as low as 50 units.

✅ Rapid Delivery: 85% of orders ship within 15 days, with emergency stock available for 72-hour dispatch.

Trusted in Critical Applications

Oil & Gas Transmission Lines: API 6A-certified flanges for wellheads and manifolds.
Refinery Systems: High-temperature-resistant A182 F316 flanges.
Hydraulic Systems: Precision-machined surfaces for vibration resistance.

Why Choose Xi'an QinSteel?

🔧 GMP-Certified Production: Our 15,000㎡ facility uses CNC machining for micron-level accuracy.

🌍 Global Logistics: Regional warehouses in the EU, North America, and Middle East reduce lead times.

📦 Damage-Proof Packaging: Industrial crates with anti-rust VCI films and shock-absorbent padding.

💡 24/7 Engineering Support: From prototype design to installation guidance, we’re your partner.

Quality Assurance Process

1. Material Verification: Cross-check MTRs against ASTM/ASME specs.

2. Dimensional Accuracy: Laser scanning ensures compliance with B16.5 tolerances.

3. Pressure Testing: Hydrostatic tests at 1.5x rated pressure.

4. Surface Inspection: No pitting, cracks, or uneven finishes.

Quality Control

Factory Equipment

Shipping Packaging

FAQs

Q: Can you provide API 6A documentation for audits?

A: Yes! We include test certificates, MTRs, and NDE reports with every shipment.

Q: What's the lead time for 1,000 custom flanges?

A: Custom orders take 25–30 days. In-stock items ship in 7–10 days.

Q: Do your flanges work in sour gas environments?

A: Absolutely. We offer NACE MR0175-compliant options.

Q: How do you prevent transit damage?

A: Flanges are individually wrapped, then secured in wooden crates with edge protectors.

Q: Can I order samples?

A: Yes—request samples via email for quality approval.

Contact Us

Need Reliable Socket Weld Pipe Flanges?

📧 Email: info@sxqinsteel.com