Repsol Steel LLP is a trusted ANSI flange supplier, supplying a comprehensive range of ANSI Class-rated flanges to industrial buyers, EPC contractors, and procurement teams across Africa, USA, Mexico, Oman, and Europe. ANSI flanges are designated by their pressure-temperature rating class — Class 150, 300, 400, 600, 900, 1500, and 2500 — as defined in the American National Standard ASME B16.5 for sizes NPS ½ through 24, and ASME B16.47 for sizes NPS 26 through 60. The term "ANSI Class" is the colloquial designation for these pressure-temperature ratings, derived from the standard's history as an American National Standard. We supply ANSI 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, and third-party certification where required.
Whether you require standard ANSI Class 150 weld neck flanges for a refinery in Oman, ANSI Class 600 slip-on flanges for a petrochemical plant in Mexico, ANSI Class 900 blind flanges for a high-pressure system in Europe, or ANSI Class 2500 flanges for critical service in Africa or the USA — Repsol Steel LLP delivers the right ANSI flange solution, on time, with complete export documentation.
A complete ANSI flange supply portfolio covering Class 150 through Class 2500 flanges per ASME B16.5, ASME B16.47, and ANSI/MSS SP-44 — engineered for high-pressure, high-temperature, and critical piping systems across Africa, USA, Mexico, Oman, and Europe.
ANSI Class 150 flanges for low-pressure piping service. The most widely used class for general industrial applications — available in weld neck, slip-on, blind, lap joint, socket weld, and threaded types.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, B16.47
Size Range: ½" to 60"
ANSI Class 300 and 400 flanges for moderate-pressure piping service. Class 300 is widely used in process piping and utility systems; Class 400 provides intermediate pressure capability.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, B16.47
Size Range: ½" to 60"
ANSI Class 600 and 900 flanges for high-pressure piping service. Used in refineries, petrochemical plants, and power generation where higher pressure containment is required.
Grades: A105, A182 F316, F11, F22, F91
Compliance: ASME B16.5, B16.47, API 6A
Size Range: ½" to 60"
ANSI Class 1500 and 2500 flanges for extreme high-pressure piping service. Used in wellhead equipment, subsea systems, and critical high-pressure hydrocarbon service.
Grades: A105, A182 F316, F22, F91, Duplex
Compliance: ASME B16.5, API 6A
Size Range: ½" to 24"
ANSI B16.47 Series A and Series B flanges for large diameter piping (NPS 26–60). Series A follows MSS SP-44 drilling; Series B follows API 605 drilling.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.47 Series A & B
Size Range: 26" to 60"
Custom-manufactured ANSI flanges in non-standard classes, sizes, materials, and configurations per drawings and project specifications — including ANSI/MSS SP-44 pipeline flanges.
Grades: A105, A182, A350, Duplex, Exotic
Compliance: ASME B16.5, ANSI/MSS SP-44, Custom
Size Range: ½" to 60"
ANSI 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 flange. We supply ANSI flanges in the following materials and grades:
All ANSI 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 |
|---|---|
| ANSI Classes | Class 150, 300, 400, 600, 900, 1500, 2500 |
| Flange Types | Weld Neck, Slip-On, Blind, Lap Joint, Socket Weld, Threaded, Orifice, Long Weld Neck |
| 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 60" standard; larger sizes available on request |
| Standards Compliance | ASME B16.5, ASME B16.47, ANSI/MSS SP-44, ASTM A105, A182, A350, EN 1092-1, DIN, BS |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| 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 |
ANSI Class-rated flanges provide a standardized pressure-temperature rating system that ensures interchangeability, verified performance, and global acceptance. Before finalizing an ANSI flange for projects in Africa, USA, Mexico, Oman, or Europe, our technical team recommends evaluating four key factors:
If you are unsure which ANSI 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 ANSI flange solution.
We have supplied ANSI Class 150 through 2500 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 ANSI 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 ANSI flanges comply with ASME B16.5, ASME B16.47, ANSI/MSS SP-44, ASTM A105, A182, A350, EN 1092-1, DIN, and BS standards — ensuring that products meet the exact specifications of international industrial projects.
ANSI flanges are packed with rust-preventive coating and moisture-resistant export-grade packaging designed for long-distance sea, air, and road transport — protecting product integrity 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 class selection, ANSI flange specification review, material grade selection, documentation, shipping coordination, and post-delivery follow-up — ensuring a smooth experience at every stage.
Repsol Steel LLP supplies ANSI Class-rated flanges to a wide range of process industries across Africa, USA, Mexico, Oman, and Europe where standardized pressure-temperature ratings, dimensional interchangeability, and material traceability are essential for safety and operational reliability.
ANSI Class 150 through 2500 flanges supplied for wellhead equipment, pipeline systems, process piping, and high-pressure transfer lines in upstream, midstream, and downstream operations across Africa, USA, Mexico, Oman, and Europe.
ANSI Class 150 through 900 flanges supplied for reactors, heat exchangers, process piping, and storage systems handling hydrocarbons at high pressures and temperatures.
ANSI Class 300 through 1500 flanges supplied for high-temperature and high-pressure process piping in crude distillation, catalytic cracking, and hydroprocessing units.
ANSI Class 150 through 900 flanges supplied for boilers, steam systems, turbine connections, and high-pressure auxiliary piping in thermal and combined-cycle power plants.
ANSI Class 900, 1500, and 2500 flanges supplied for wellhead equipment, christmas trees, and high-pressure gathering lines in upstream operations.
ANSI/MSS SP-44 steel pipeline flanges supplied for cross-country transmission pipelines and high-strength line pipe applications.
ANSI 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 ANSI 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 ANSI 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 ANSI flanges are supplied with material certificates, dimensional inspection reports, PMI testing, and third-party certification as required by project specifications.
Yes. We are a leading ANSI flange supplier serving buyers across Africa, the USA, Mexico, Oman, and Europe — offering Class 150, 300, 400, 600, 900, 1500, and 2500 flanges per ASME B16.5 (NPS ½–24), ASME B16.47 (NPS 26–60), and ANSI/MSS SP-44 in A105, A182, A350 LF2, duplex, and exotic alloys.
An ANSI flange is a pipe flange manufactured to an American National Standard, most commonly ASME B16.5. The "ANSI Class" designation (150, 300, 400, 600, 900, 1500, 2500) refers to the pressure-temperature rating of the flange — it does not equal psi. The actual pressure rating depends on the material of construction and the service temperature.
ASME B16.5 covers pipe flanges in sizes NPS ½ through NPS 24 in pressure classes 150, 300, 400, 600, 900, 1500, and 2500. ASME B16.47 covers large diameter steel flanges in sizes NPS 26 through NPS 60 in pressure classes 75, 150, 300, 400, 600, and 900. Together, they cover the full range of industrial flange sizes.
ANSI/MSS SP-44 is an American National Standard for steel pipeline flanges. It covers pressure-temperature ratings, materials, dimensions, tolerances, marking, and testing for pipeline flanges in sizes NPS 12 through NPS 60, in classes 150, 300, 400, 600, and 900. It is used primarily for cross-country transmission pipelines and high-strength line pipe applications.
Yes. We offer custom sizes, pressure classes, ANSI flange configurations, materials, and face types based on drawings, piping specifications, and project requirements — with quick turnaround times.
Send us your ANSI flange specifications, 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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