Repsol Steel LLP is a trusted socket weld flange supplier, supplying a comprehensive range of SW flanges to industrial buyers, EPC contractors, and procurement teams across Africa, USA, Mexico, Oman, and Europe. Socket weld flanges are designed with a socket bore that accepts the pipe, which is then fillet welded into the socket — providing a strong, leak-proof joint ideal for small-bore, high-pressure piping systems. They are extensively used in hydraulic lines, steam service, and small-bore process piping where a robust, compact connection is required. We supply socket weld flanges in A105 carbon steel, A182 stainless and alloy steel, A350 low-temperature steel, and duplex grades — with full documentation, EN 10204 3.1 certification, and international packaging standards.
With over 25 years of combined industry experience and a proven export network, we serve clients across Africa, the United States, Mexico, Oman, and Europe — including Oil & Gas, petrochemical, refinery, power generation, chemical processing, and marine facilities. Our supply operations are structured to meet the documentation, packaging, and compliance requirements of international industrial procurement — including Material Test Certificates (MTC), dimensional inspection reports, NACE compliance, PMI testing, radiography, and third-party certification where required.
Whether you require standard A105 socket weld flanges for a refinery in Oman, A182 F316 SW flanges for a petrochemical plant in Mexico, F11/F22/F91 socket weld flanges for a high-temperature power plant in Europe, or RTJ socket weld flanges for critical high-pressure service in Africa or the USA — Repsol Steel LLP delivers the right socket weld flange solution, on time, with complete export documentation.
A complete socket weld flange supply portfolio covering raised face, flat face, RTJ, reducing, and custom SW flanges — engineered for small-bore, high-pressure piping systems across Africa, USA, Mexico, Oman, and Europe.
The most common socket weld flange type — with a raised face where the gasket sits above the bolting surface. Used for small-bore, high-pressure piping in general and critical service.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, EN 1092-1
Size Range: ½" to 4"
Ring Type Joint (RTJ) socket weld flanges with a machined groove for a metal ring gasket — providing a metal-to-metal seal ideal for critical high-pressure and high-temperature service.
Grades: A105, A182 F316, F11, F22, F91
Compliance: ASME B16.5, API 6A
Size Range: ½" to 4"
Flat face socket weld flanges with a full gasket surface across the flange face — used in low-pressure applications, cast iron flanges, and where full-face gaskets are required.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, EN 1092-1
Size Range: ½" to 4"
Reducing socket weld flanges with a socket bore smaller than the flange size — used to connect a smaller pipe to a larger flange in compact, high-pressure piping systems.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5
Size Range: ½" to 4"
High-pressure socket weld flanges in Class 900, 1500, and 2500 — used in hydraulic systems, high-pressure steam lines, and critical small-bore process piping.
Grades: A105, A182 F316, F11, F22, F91
Compliance: ASME B16.5, API 6A
Size Range: ½" to 4"
Custom-manufactured socket weld flanges in non-standard sizes, socket bores, materials, and face types per drawings and project specifications — with quick turnaround times.
Grades: A105, A182, A350, Duplex, Exotic
Compliance: ASME B16.5, DIN, Custom Drawings
Size Range: ½" to 4"
Socket weld flanges are supplied in different materials and grades to suit specific pressure, temperature, and media conditions across Africa, USA, Mexico, Oman, and Europe. The material grade determines the mechanical strength, corrosion resistance, and temperature capability of the SW flange. We supply socket weld flanges in the following materials and grades:
All socket weld flanges we supply are accompanied by Material Test Certificates (MTC to EN 10204 3.1) confirming the exact grade, mechanical properties, and heat number — ensuring full traceability and compliance with international project specifications. PMI testing is available on request.
| Parameter | Specification |
|---|---|
| Flange Type | Socket Weld (SW), RF SW, FF SW, RTJ SW, Reducing SW, High-Pressure SW, Custom SW |
| Materials | Carbon Steel (A105), Stainless Steel (F304, F316, F321), Alloy Steel (F11, F22, F91), Low-Temp (LF2), Duplex (F51, F53, F55), Exotic Alloys (Monel, Inconel, Hastelloy) |
| Size Range | ½" to 4" standard (small-bore); larger sizes available on request |
| Pressure Classes | PN16, PN25, PN40 (EN 1092-1); Class 150, 300, 600, 900, 1500, 2500 (ASME B16.5) |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Standards Compliance | ASME B16.5, ASTM A105, A182, A350, EN 1092-1, DIN, BS, API 6A |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | PMI testing, ultrasonic testing, radiography, third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | Hardness test reports, NACE compliance, H2S service documentation available on request |
Socket weld flanges are ideal for small-bore, high-pressure piping systems where a compact, strong, and leak-proof connection is required. Before finalizing a socket weld flange for projects in Africa, USA, Mexico, Oman, or Europe, our technical team recommends evaluating four key factors:
If you are unsure which socket weld flange specification best suits your application, our technical team is available to review your piping drawings, process data, and project specifications — and recommend the most suitable SW flange solution.
We have supplied socket weld flanges to buyers across Africa, the USA, Mexico, Oman, and Europe — building a supply track record that reflects reliability, compliance, and on-time delivery.
Every socket weld flange shipment is accompanied by complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, Material Test Certificates (MTC to EN 10204 3.1), and third-party inspection reports on request.
Our socket weld flanges comply with ASME B16.5, ASTM A105, A182, A350, EN 1092-1, DIN, and API 6A standards — ensuring that products meet the exact specifications of international industrial projects.
Socket weld flanges are packed in durable, moisture-resistant export-grade packaging designed for long-distance sea, air, and road transport — protecting the socket bore, hub, and face finish from factory to destination.
We support a range of Incoterms — FOB, CIF, CFR, EXW, DAP — and coordinate with trusted freight partners for sea, air, and multimodal shipments to major ports across Africa, USA, Mexico, Oman, and Europe based on buyer preference.
Our support team assists buyers with grade selection, socket weld flange specification review, face type selection, documentation, shipping coordination, and post-delivery follow-up — ensuring a smooth experience at every stage.
Repsol Steel LLP supplies socket weld flanges to a wide range of process industries across Africa, USA, Mexico, Oman, and Europe where small-bore, high-pressure, and leak-proof piping connections are essential for safety and operational reliability.
A105 and A350 LF2 socket weld flanges supplied for instrument lines, hydraulic systems, small-bore process piping, and high-pressure transfer lines in upstream, midstream, and downstream operations across Africa, USA, Mexico, Oman, and Europe.
A182 F316 and duplex socket weld flanges supplied for small-bore process piping, sampling lines, and high-pressure utility systems in petrochemical plants.
F11, F22, and F91 socket weld flanges supplied for high-temperature and high-pressure small-bore piping in crude distillation, catalytic cracking, and hydroprocessing units.
High-temperature F11, F22, and F91 socket weld flanges supplied for steam lines, drain lines, instrument connections, and high-pressure auxiliary piping in thermal and combined-cycle power plants.
High-pressure socket weld flanges supplied for hydraulic lines, control systems, instrument tubing, and small-bore piping — where a compact, leak-proof connection is critical.
F304, F316, and F904L socket weld flanges supplied for aggressive chemical and corrosive media applications in chemical plants, sampling systems, and utility lines.
Socket weld flanges supplied to fabrication units and EPC contractors for piping spools, skids, modular systems, and industrial assemblies — with quick turnaround times and documentation support.
Repsol Steel LLP is recognized as a reliable socket weld flange supplier for procurement teams, EPC contractors, and maintenance projects across Africa, the USA, Mexico, Oman, and Europe. Our export documentation, packaging, and standard compliance are structured for smooth cross-border supply to buyers worldwide — ensuring your socket weld flanges arrive on time, in specification, and ready for installation.
Africa: Oil & Gas, mining, refinery & industrial piping projects
USA: Oil & Gas, chemical, power generation & EPC supply
Mexico: Refinery, petrochemical & process industry projects
Oman: Oil & Gas, petrochemical, desalination & refinery projects
Europe: Chemical, power, marine & industrial piping supply
All socket weld flanges are supplied with material certificates, dimensional inspection reports, PMI testing, radiography, and third-party certification as required by project specifications.
Yes. We are a leading socket weld flange supplier serving buyers across Africa, the USA, Mexico, Oman, and Europe — offering RF, FF, RTJ, reducing, high-pressure, and custom SW flanges in A105, A182, A350 LF2, duplex, and exotic alloys.
A socket weld flange has a socket bore that accepts the pipe, which is then fillet welded into the socket. It provides a strong, compact, leak-proof joint and is widely used in small-bore, high-pressure piping systems — including hydraulic lines, steam service, instrument lines, and utility connections (typically ½" to 4").
We supply socket weld flanges in ASTM A105 (carbon steel), ASTM A182 F304, F316, F321 (stainless steel), ASTM A182 F11, F22, F91 (alloy steel), ASTM A350 LF2 (low-temp carbon steel), and duplex grades F51, F53, F55.
A socket weld flange has a socket bore that the pipe inserts into, and it is fillet welded at one end — used for small-bore, high-pressure piping. A slip-on flange slides over the pipe and is fillet welded on both ends — used for larger, lower-pressure piping. Socket weld flanges are typically available in sizes up to 4", while slip-on flanges are available up to 60".
Yes. We offer custom sizes, socket bores, pressure classes, materials, face types, and socket weld flange configurations based on drawings, piping specifications, and project requirements — with quick turnaround times.
Send us your socket weld flange specifications, grade requirements, or drawings. Our export team will respond within 24 hours with a tailored quotation.
Repsol Steel LLP is a leading manufacturer and stockholder of high-quality piping products, serving the Oil, Gas, Petrochemical, and Nuclear industries with reliable engineering solutions.
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