Repsol Steel LLP is a leading flange manufacturer supplying high-integrity pipe flanges to buyers across the USA, Europe, Africa, Mexico, and Oman. We manufacture a comprehensive range of flanges — including weld neck, slip-on, blind, lap joint, socket weld, and threaded flanges — in stainless steel, carbon steel, alloy steel, duplex, and exotic alloys for Oil & Gas, petrochemical, refinery, power generation, and industrial piping applications.
With over 25 years of combined industry experience, our manufacturing facility is equipped for high-precision flange production — including forging, machining, heat treatment, drilling, and testing operations. Every flange we manufacture complies with ASME B16.5, ASME B16.47, ASTM A105, ASTM A182, ASTM A350, and DIN standards, with full material traceability, dimensional inspection reports, and documentation that meets the requirements of projects in the USA, Europe, Africa, Mexico, and Oman.
Whether you require standard SS316 weld neck flanges for a petrochemical plant in Europe, A105 slip-on flanges for a refinery in the USA, or A182 F11 blind flanges for a high-temperature power plant in Africa or Oman — Repsol Steel LLP manufactures the right flange solution, on time, with complete export documentation.
A complete flange manufacturing portfolio covering weld neck, slip-on, blind, lap joint, socket weld, and threaded flanges — manufactured in SS, CS, alloy steel, duplex, and exotic alloys for high-pressure and high-temperature piping systems.
Weld neck flanges manufactured with a long tapered hub that provides smooth stress distribution. Used in high-pressure and high-temperature piping systems where cyclic loading is a concern.
Compliance: ASME B16.5, B16.47
Face Types: RF, FF, RTJ
Size Range: ½" to 60"
Slip-on flanges manufactured to slide over the pipe and be fillet welded at both ends. Cost-effective and easy to align, used in low-pressure and moderate-pressure piping systems.
Compliance: ASME B16.5, B16.47
Face Types: RF, FF
Size Range: ½" to 60"
Blind flanges manufactured with no center hole, used to close off pipe ends, valves, and pressure vessel openings. Essential for isolation, inspection, and future expansion.
Compliance: ASME B16.5, B16.47
Face Types: RF, FF, RTJ
Size Range: ½" to 60"
Lap joint flanges manufactured for use with stub ends in piping systems requiring frequent dismantling. The flange is free to rotate, allowing easy alignment of bolt holes.
Compliance: ASME B16.5
Face Types: RF, FF
Size Range: ½" to 24"
Socket weld flanges manufactured for high-pressure and small-bore piping. The pipe is inserted into the socket and fillet welded, providing a strong, leak-proof joint.
Compliance: ASME B16.5
Face Types: RF, FF, RTJ
Size Range: ½" to 4"
Threaded flanges (NPT/BSP) for utility piping, plus custom-manufactured flanges in non-standard sizes, materials, and configurations per project specifications.
Compliance: ASME B16.5, DIN
Thread Types: NPT, BSP, BSPT
Size Range: ½" to 24"
As a specialist flange manufacturer, we follow a structured manufacturing process that ensures dimensional accuracy, material integrity, and consistent performance in every flange we produce. Pipe flanges are manufactured to meet the exact requirements of high-pressure and high-temperature piping systems.
This manufacturing process allows us to produce flanges that perform reliably in the most demanding industrial environments — from high-pressure Oil & Gas pipelines to high-temperature refinery and power generation operations. Every flange we manufacture is tested and documented to meet ASME B16.5, ASME B16.47, ASTM A105, ASTM A182, and ASTM A350 standards.
Industrial flanges are manufactured in different materials and grades to suit specific pressure, temperature, and media conditions. The material grade determines the mechanical strength, corrosion resistance, and temperature capability of the flange. We manufacture pipe flanges in the following materials and grades:
All flanges we manufacture are accompanied by Material Test Certificates (MTC) confirming the exact grade, mechanical properties, and heat number — ensuring full traceability and compliance with international project specifications.
| Parameter | Specification |
|---|---|
| Flange Types | Weld Neck, Slip-On, Blind, Lap Joint, Socket Weld, Threaded, Orifice, Long Weld Neck |
| Materials | Stainless Steel (SS304, SS316, SS321), Carbon Steel (A105), Alloy Steel (F11, F22, F91), Low-Temp (LF2), Duplex (F51, F53, F55), Exotic Alloys (Monel, Inconel, Hastelloy) |
| Size Range | ½" to 60" standard; larger sizes available on request |
| Pressure Classes | Class 150, 300, 600, 900, 1500, 2500 (ASME B16.5); Class 75 to 900 (ASME B16.47) |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Standards Compliance | ASME B16.5, ASME B16.47; ASTM A105, A182, A350; DIN, BS, EN 1092-1 |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | Third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | Hardness test reports, NACE compliance, H2S service documentation available on request |
Correct flange selection is critical to ensuring a leak-free piping system and long-term operational safety. The flange type, material grade, and pressure class must be matched to the operating pressure, temperature, and media. Our technical team recommends evaluating four key factors before finalizing a flange:
If you are unsure which 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 flange solution.
We specialize in flange manufacturing — offering weld neck, slip-on, blind, lap joint, socket weld, threaded, orifice, and long weld neck flanges in SS, CS, alloy steel, duplex, and exotic alloys. All flanges are manufactured to ASME, ASTM, and DIN standards.
Our manufacturing unit is equipped for high-precision flange production — covering forging, machining, heat treatment, drilling, and testing operations. This allows us to control quality at every stage of production.
Every flange batch is backed by Material Test Certificates (MTC) and dimensional inspection reports, and can be supplied with NACE compliance documentation, hardness test reports, and third-party certification on request.
Non-standard sizes, pressure classes, materials, face types, and flange configurations are manufactured according to drawings, piping specifications, and project requirements — with quick turnaround times.
We manufacture and export flanges to clients in the USA, Europe, Africa, Mexico, and Oman — with packaging, documentation, and compliance structured for international procurement.
Our experienced technical team assists with flange selection, material and pressure class recommendations, and installation guidance. Post-supply support includes documentation follow-up and replacement coordination.
Repsol Steel LLP manufactures flanges for a wide range of process industries across USA, Europe, Africa, Mexico, and Oman — where reliable bolted connections are essential.
Flanges manufactured for wellhead equipment, pipeline systems, process piping, and high-pressure transfer lines in upstream, midstream, and downstream operations.
Flanges manufactured for reactors, heat exchangers, process piping, and storage systems handling hydrocarbons at high pressures and temperatures.
F11, F22, and F91 flanges manufactured for high-temperature and high-pressure process piping in crude distillation, catalytic cracking, and hydroprocessing units.
High-temperature F11, F22, and F91 flanges manufactured for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and nuclear power plants.
SS316 and SS904L flanges manufactured for aggressive chemical and corrosive media applications in reactors, storage tanks, and process equipment.
Duplex and Super Duplex flanges manufactured for subsea wellhead equipment, manifolds, and flowlines per API 17D — with superior resistance to seawater and chloride stress corrosion.
Repsol Steel LLP is recognized as a reliable flange manufacturer for international procurement teams, EPC contractors, and maintenance projects. Our manufacturing, export documentation, and packaging are structured for smooth cross-border supply to buyers in the USA, Europe, Africa, Mexico, and Oman — ensuring your flanges arrive on time, in specification, and ready for installation.
USA: Flange manufacturing for Oil & Gas, petrochemical & power projects
Europe: Flanges for chemical, refinery & process industries
Africa: Flanges for refinery, petrochemical & power projects
Mexico: Flange manufacturing for chemical plants & refinery operations
Oman: Flanges for Oil & Gas, petrochemical & power projects
All flanges are manufactured and exported with material certificates, dimensional inspection reports, and third-party certification as required by project specifications.
Repsol Steel LLP combines 25+ years of industry experience, an in-house manufacturing facility with forging, machining, heat treatment, and testing capabilities, compliance with ASME, ASTM, and DIN standards, and a proven export track record across the USA, Europe, Africa, Mexico, and Oman.
We manufacture weld neck, slip-on, blind, lap joint, socket weld, threaded, orifice, and long weld neck flanges — in various grades, sizes, pressure classes, and face types per project specifications.
We manufacture 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.
We manufacture and export flanges primarily to the USA, Europe, Africa, Mexico, and Oman, serving Oil & Gas, petrochemical, refinery, power, and chemical processing projects in these regions.
Yes. We manufacture custom sizes, pressure classes, materials, face types, and flange configurations based on drawings, piping specifications, and project requirements — with quick turnaround times for export orders.
Send us your flange specifications, pressure class 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.
Repsol Steels LLP Team Is Here to Help
Looking for reliable pipes, fittings, flanges, valves or other industrial piping products? Share your requirement and our team will help you find the right product, material and specification.