Repsol Steel LLP is a trusted high pressure flange supplier, supplying a comprehensive range of Class 900, 1500, and 2500 flanges to industrial buyers, EPC contractors, and procurement teams across Africa, USA, Mexico, Oman, and Europe. High pressure flanges are engineered with thicker walls, larger bolting, and heavier hubs to withstand extreme internal pressures — and are typically supplied with RTJ (Ring Type Joint) faces for a metal-to-metal seal in critical gas, hydrocarbon, hydrogen, and wellhead service. They are widely used in upstream Oil & Gas, subsea systems, high-pressure refineries, ultra-supercritical power plants, and hydrogen service piping. We supply high pressure 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 upstream Oil & Gas, subsea, refinery, power generation, hydrogen, and petrochemical 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, H2S service documentation, PMI testing, hardness testing, radiography, and third-party certification where required.
Whether you require Class 900 A105 high pressure weld neck flanges for a refinery in Oman, Class 1500 A182 F316 RTJ flanges for a wellhead in Mexico, Class 2500 F91 high pressure blind flanges for a hydrogen unit in Europe, or API 6A high pressure flanges for subsea service in Africa or the USA — Repsol Steel LLP delivers the right high pressure flange solution, on time, with complete export documentation.
A complete high pressure flange supply portfolio covering Class 900, 1500, and 2500 weld neck, blind, RTJ, and API 6A flanges — engineered for extreme pressure, high temperature, and critical gas service across Africa, USA, Mexico, Oman, and Europe.
Class 900, 1500, and 2500 high pressure weld neck flanges with a long tapered hub for smooth stress distribution — the preferred choice for critical high-pressure piping in refineries, power plants, and wellhead service.
Grades: A105, A182 F316, F11, F22, F91, A350 LF2
Compliance: ASME B16.5, API 6A
Size Range: ½" to 24"
Ring Type Joint (RTJ) high pressure flanges with a machined groove for a metal ring gasket — providing a metal-to-metal seal ideal for critical high-pressure gas, hydrocarbon, and hydrogen service.
Grades: A105, A182 F316, F11, F22, F91, A350 LF2
Compliance: ASME B16.5, API 6A
Size Range: ½" to 24"
Class 900, 1500, and 2500 high pressure blind flanges with no center hole, used to close off high-pressure pipe ends, valves, and pressure vessel openings — essential for isolation in critical service.
Grades: A105, A182 F316, F11, F22, F91, A350 LF2
Compliance: ASME B16.5, API 6A
Size Range: ½" to 24"
API 6A high pressure flanges for wellhead equipment, christmas trees, and subsea systems — engineered for extreme pressure up to 20,000 psi in upstream Oil & Gas service.
Grades: A105, A182 F316, F22, F91, Duplex F51/F55
Compliance: API 6A, ASME B16.5
Size Range: 1 13/16" to 20"
Alloy steel (F11, F22, F91) high pressure flanges for hydrogen service, hydrotreating, and hydrocracking units — where carbon steel is unsuitable due to hydrogen embrittlement.
Grades: F11, F22, F91, F5, F9
Compliance: ASME B16.5, ASTM A182, NACE
Size Range: ½" to 24"
Custom-manufactured high pressure flanges in non-standard sizes, thicker walls, exotic alloys, and special face configurations per drawings and project specifications — with quick turnaround times.
Grades: A105, A182, A350, Duplex, Exotic Alloys
Compliance: ASME B16.5, API 6A, Custom Drawings
Size Range: ½" to 24"
High pressure 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 pressure containment capability, high-temperature strength, and resistance to hydrogen, H2S, and corrosion. We supply high pressure flanges in the following materials and grades:
All high pressure 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, hardness testing, and NACE/H2S documentation are available on request.
| Parameter | Specification |
|---|---|
| Flange Types | High Pressure Weld Neck, Blind, RTJ, API 6A Wellhead, Hydrogen Service, Custom HP |
| Pressure Classes | Class 900, 1500, 2500 (ASME B16.5); API 6A 2000 psi to 20,000 psi |
| Materials | Carbon Steel (A105), Stainless Steel (F304, F316, F321), Alloy Steel (F11, F22, F91), Low-Temp (LF2), Duplex (F51, F53, F55), Exotic Alloys (Inconel, Monel, Hastelloy) |
| Size Range | ½" to 24" standard; larger sizes available on request |
| Face Types | RTJ (Ring Type Joint) — primary; RF (Raised Face) and FF (Flat Face) available per application |
| Standards Compliance | ASME B16.5, API 6A, ASTM A105, A182, A350, EN 1092-1, NACE MR0175 |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | PMI testing, hardness testing, ultrasonic testing, radiography, hydrostatic testing, third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | NACE MR0175 / ISO 15156 compliance, H2S service documentation, hydrogen service certification available on request |
High pressure flanges are designed for critical service where standard flanges would fail under extreme pressure, high temperature, or hydrogen/H2S environments. Before finalizing a high pressure flange for projects in Africa, USA, Mexico, Oman, or Europe, our technical team recommends evaluating four key factors:
If you are unsure which high pressure 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 high pressure flange solution.
We have supplied Class 900, 1500, and 2500 high pressure 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 high pressure 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 high pressure flanges comply with ASME B16.5, API 6A, ASTM A105, A182, A350, EN 1092-1, and NACE MR0175 standards — ensuring that products meet the exact specifications of international critical-service projects.
High pressure flanges are packed with RTJ groove protectors, rust-preventive coating, and moisture-resistant export-grade packaging designed for long-distance sea, air, and road transport — protecting critical face finishes 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, high pressure flange specification review, RTJ groove documentation, NACE compliance, and shipping coordination — ensuring a smooth experience at every stage.
Repsol Steel LLP supplies high pressure flanges to a wide range of process industries across Africa, USA, Mexico, Oman, and Europe where extreme pressure containment, high-temperature strength, and reliable metal-to-metal sealing are essential for safety and operational reliability.
API 6A high pressure flanges (up to 20,000 psi) supplied for wellhead equipment, christmas trees, and high-pressure gathering lines in upstream operations across Africa, USA, Mexico, Oman, and Europe.
Duplex and super duplex high pressure flanges supplied for subsea systems, offshore platforms, and high-pressure marine service where chloride resistance is critical.
F11, F22, and F91 high pressure flanges supplied for high-temperature and high-pressure process piping in crude distillation, hydrocracking, and hydroprocessing units.
F11, F22, and F91 high pressure flanges supplied for superheated steam lines, boiler connections, turbine piping, and high-pressure auxiliary systems in thermal and ultra-supercritical power plants.
F11, F22, and F91 high pressure flanges supplied for hydrogen service, hydrotreating, hydrocracking, and H2S environments — where carbon steel is unsuitable.
F11, F22, and F91 high pressure flanges supplied for high-temperature reactors, ammonia synthesis loops, urea plants, and hydrogen recovery units.
High pressure flanges supplied to fabrication units and EPC contractors for critical piping spools, skids, and modular systems — with quick turnaround times and complete documentation support.
Repsol Steel LLP is recognized as a reliable high pressure 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 high pressure flanges arrive on time, in specification, and ready for installation.
Africa: Upstream Oil & Gas, refinery, mining & industrial piping projects
USA: Upstream Oil & Gas, refinery, power generation & hydrogen supply
Mexico: Refinery, petrochemical & upstream Oil & Gas projects
Oman: Upstream Oil & Gas, refinery, petrochemical & gas processing projects
Europe: Refinery, power, petrochemical & hydrogen supply
All high pressure flanges are supplied with material certificates, dimensional inspection reports, PMI testing, hardness testing, hydrostatic testing, and third-party certification as required by project specifications.
Yes. We are a leading high pressure flange supplier serving buyers across Africa, the USA, Mexico, Oman, and Europe — offering Class 900, 1500, and 2500 flanges (ASME B16.5) and API 6A wellhead flanges (up to 20,000 psi) with RTJ faces in A105, A182 F316, F11, F22, F91, A350 LF2, and duplex grades.
A high pressure flange is a forged piping component engineered with thicker walls, larger bolting, and heavier hubs to withstand extreme internal pressures (Class 900, 1500, 2500, or up to 20,000 psi per API 6A). It is typically supplied with an RTJ face for metal-to-metal sealing. It is widely used in upstream Oil & Gas, subsea systems, refineries, ultra-supercritical power plants, and hydrogen service.
RTJ (Ring Type Joint) is a machined groove on the flange face that accepts a metal ring gasket. When the flanges are bolted together, the ring gasket is compressed between the two grooves, creating a metal-to-metal seal. RTJ faces are preferred for high pressure and high temperature service because they provide superior sealing performance and reliability compared to standard gaskets — especially in critical gas, hydrocarbon, and hydrogen service.
We supply high pressure 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. Exotic alloys such as Inconel, Monel, and Hastelloy are also available.
Yes. We offer custom sizes, pressure classes (including beyond Class 2500), materials, thicker walls, exotic alloys, and special face configurations based on drawings, piping specifications, and project requirements — with quick turnaround times.
Send us your high pressure 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.
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