Repsol Steel LLP is a trusted slip on flange supplier, supplying a comprehensive range of SO flanges to industrial buyers, EPC contractors, and procurement teams across Africa, USA, Mexico, Oman, and Europe. Slip-on flanges are designed to slide over the pipe and be fillet welded at both ends (inside and outside) — providing a strong, cost-effective connection that is easier to align than weld neck flanges. They are widely used in low-pressure and moderate-pressure piping systems where the additional strength of a butt weld is not required. We supply slip-on 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 A105 slip-on flanges for a refinery in Oman, A182 F316 SO flanges for a petrochemical plant in Mexico, F11/F22/F91 slip-on flanges for a high-temperature power plant in Europe, or slip-on flanges with raised or flat faces for utility piping in Africa or the USA — Repsol Steel LLP delivers the right slip-on flange solution, on time, with complete export documentation.
A complete slip-on flange supply portfolio covering raised face, flat face, hubbed, ring type joint, and custom SO flanges — engineered for low and moderate-pressure piping systems across Africa, USA, Mexico, Oman, and Europe.
The most common slip-on flange type — with a raised face where the gasket sits above the bolting surface. Used for low and moderate-pressure piping in general industrial service.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, B16.47, EN 1092-1
Size Range: ½" to 60"
Flat face slip-on 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 60"
Hubbed slip-on flanges (Type SO) with a short raised hub for added strength at the weld joint — ideal for moderate-pressure service where additional reinforcement is desired.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.5, EN 1092-1
Size Range: ½" to 24"
Ring Type Joint (RTJ) slip-on flanges with a machined groove for a metal ring gasket — providing a metal-to-metal seal for critical high-pressure service where SO flanges are acceptable.
Grades: A105, A182 F316, F11, F22
Compliance: ASME B16.5, API 6A
Size Range: ½" to 24"
Large diameter slip-on flanges per ASME B16.47 (Series A & B) for pipelines, storage tanks, and large-bore piping — available up to 60" and beyond on request.
Grades: A105, A182, A350 LF2
Compliance: ASME B16.47 Series A & B
Size Range: 26" to 60"
Custom-manufactured slip-on flanges in non-standard sizes, bores, hub lengths, 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 60"
Slip-on 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 SO flange. We supply slip-on flanges in the following materials and grades:
All slip-on 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 | Slip-On (SO), RF Slip-On, FF Slip-On, RTJ Slip-On, Hubbed SO, Large Diameter SO, Custom SO |
| 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 |
| Pressure Classes | PN6, PN10, PN16, PN25, PN40 (EN 1092-1); Class 150, 300, 600, 900 (ASME B16.5) |
| Face Types | RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint) |
| Standards Compliance | ASME B16.5, ASME B16.47, ASTM A105, A182, A350, EN 1092-1, DIN, BS |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | PMI testing, ultrasonic testing, third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | Hardness test reports, NACE compliance, H2S service documentation available on request |
Slip-on flanges are the most economical and easiest-to-align flange type, making them ideal for low and moderate-pressure piping systems. Before finalizing a slip-on flange for projects in Africa, USA, Mexico, Oman, or Europe, our technical team recommends evaluating four key factors:
If you are unsure which slip-on 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 SO flange solution.
We have supplied slip-on 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 slip-on 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 slip-on flanges comply with ASME B16.5, ASME B16.47, ASTM A105, A182, A350, EN 1092-1, DIN, and BS standards — ensuring that products meet the exact specifications of international industrial projects.
Slip-on flanges are packed in durable, moisture-resistant export-grade packaging designed for long-distance sea, air, and road transport — protecting the hub, bore, 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, slip-on 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 slip-on flanges to a wide range of process industries across Africa, USA, Mexico, Oman, and Europe where cost-effective, easy-to-align, and reliable bolted connections are essential for piping system efficiency.
A105 and A350 LF2 slip-on flanges supplied for utility piping, low-pressure process lines, and general piping systems in upstream, midstream, and downstream operations across Africa, USA, Mexico, Oman, and Europe.
A182 F316 and duplex slip-on flanges supplied for moderate-pressure process piping, cooling water lines, and utility systems in petrochemical plants.
F11, F22, and F91 slip-on flanges supplied for moderate-pressure and moderate-temperature process piping in crude distillation, catalytic cracking, and utility systems.
A105 and F11 slip-on flanges supplied for cooling water systems, auxiliary piping, and low-pressure utility lines in thermal and combined-cycle power plants.
A105 and F316 slip-on flanges supplied for water pipelines, treatment plant piping, and utility systems in municipal and industrial water treatment facilities.
F304, F316, and F904L slip-on flanges supplied for moderate-pressure chemical and corrosive media applications in chemical plants, storage tanks, and utility systems.
Slip-on 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 slip on 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 slip-on 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 slip-on 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 slip on flange supplier serving buyers across Africa, the USA, Mexico, Oman, and Europe — offering RF, FF, RTJ, hubbed, large diameter, and custom SO flanges in A105, A182, A350 LF2, duplex, and exotic alloys.
A slip-on flange slides over the pipe and is fillet welded at both ends (inside and outside). It is cost-effective, easy to align, and widely used in low-pressure and moderate-pressure piping systems — including utility lines, cooling water systems, and general process piping.
We supply slip-on 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 slip-on flange slides over the pipe and is fillet welded on both ends — it is more economical and easier to align, but has lower fatigue strength. A weld neck flange has a long tapered hub and is butt welded to the pipe — it provides superior stress distribution and is preferred for high-pressure, high-temperature, and cyclic-load service.
Yes. We offer custom sizes, bores, hub lengths, pressure classes, materials, face types, and slip-on flange configurations based on drawings, piping specifications, and project requirements — with quick turnaround times.
Send us your slip-on 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.
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.