Repsol Steel LLP is a trusted fasteners supplier for refinery projects, exporting a comprehensive range of high-integrity bolting to refinery operators, EPC contractors, and procurement teams across Africa, USA, Mexico, Oman, and Europe. Our product range includes ASTM A193 B7, B7M, B16, B8, B8M stud bolts, ASTM A194 2H, 2HM, 8, 8M heavy hex nuts, and exotic alloy bolting — manufactured in accordance with ASME B18.2.1, ASME B18.2.2, ASTM A193, ASTM A194, and other international standards. Every export shipment is supplied with full documentation, EN 10204 3.1 certification, and international packaging standards suited to global import requirements.
With over 25 years of combined industry experience and a proven export network, we serve clients across Africa, USA, Mexico, Oman, and Europe — including crude distillation units, catalytic cracking units, hydrocrackers, hydrotreaters, cokers, and FCC units. Our export operations are structured to meet the documentation, packaging, customs, and compliance requirements of international procurement — including Material Test Certificates (MTC), NACE MR0175/ISO 15156 compliance, PMI testing, Certificate of Origin, and third-party certification where required.
Whether you require A193 B7 stud bolts with A194 2H nuts for a hydrocracker in Europe, B7M bolting for a sour service unit in USA, B8M Class 2 fasteners for a heat exchanger in Oman, B16 bolting for a coker in Mexico, or exotic alloy bolting for a reactor in Africa — Repsol Steel LLP exports the right refinery fastener solution, on time, with complete export documentation and customs support.
A complete refinery fastener export portfolio covering A193 B7, B7M, B16, B8, B8M stud bolts, A194 2H, 2HM, 8, 8M heavy hex nuts, and exotic alloy bolting — engineered for high-pressure, high-temperature, and sour service in refinery projects.
Chromium-molybdenum steel stud bolts exported for high-temperature and high-pressure flanged connections in reactors, columns, and process piping.
Grade: A193 B7 (AISI 4140/4142)
Tensile: 125 KSI Min.
Hardness: 35 HRC Max.
Heavy hex nuts exported for use with A193 B7 stud bolts. Single-chamfered with bottom washer face for flanged connections.
Grade: A194 2H
Hardness: C24 to C38
Compliance: ASME B18.2.2
B7M and L7M bolting exported for sour service applications in refinery units. Hardness limited to 22 HRC for H2S resistance.
Grades: B7M, L7M
Compliance: NACE MR0175/ISO 15156
Hardness: 22 HRC Max.
Stainless steel bolting exported for corrosive refinery service. B8M Class 2 fasteners recommended for chloride and marine environments.
Grades: B8 (SS304), B8M (SS316)
Nuts: A194 8, 8M
Compliance: ASTM A193, A194
Chromium-molybdenum-vanadium steel bolting exported for higher-temperature service up to 500°C in refinery reactors and fired heaters.
Grade: A193 B16
Nuts: A194 4, 7
Applications: Reactors, Fired Heaters
Exotic alloy fasteners including Alloy 625, Alloy 718, Duplex, and Titanium exported for highly corrosive and high-temperature refinery applications. Custom-manufactured per drawings.
Grades: 625, 718, Duplex, Titanium
Applications: Reactors, Exotic Service
Compliance: ASTM, Custom
Refinery fasteners are exported in different materials and grades to suit specific pressure, temperature, and media conditions. We export refinery fasteners to Africa, USA, Mexico, Oman, and Europe in the following materials and grades:
All refinery fasteners we export 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 |
|---|---|
| Fastener Types | Stud Bolts, Hex Bolts, Heavy Hex Nuts, Hex Nuts, Washers, Threaded Rods, Custom |
| Materials | A193 B7, B7M, B16, B8, B8M; A194 2H, 2HM, 4, 7, 7M, 8, 8M; A320 L7, L7M; Alloy 625, 718; Duplex; Titanium |
| Size Range | Imperial: ½" to 4"; Metric: M6 to M100; Larger sizes available on request |
| Standards Compliance | ASTM A193, A194, A320; ASME B18.2.1, B18.2.2; NACE MR0175/ISO 15156; EN 10204 3.1 |
| Export Documentation | Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, MTC (EN 10204 3.1) |
| Inspection Options | PMI testing, hardness testing, impact testing, third-party inspection (SGS, BV, TUV, Intertek) available on request |
| Additional Documentation | NACE MR0175/ISO 15156 compliance, sour service certification, hydrogen service documentation available on request |
Refinery fasteners are critical for ensuring leak-proof flanged connections, pressure containment, and safe operations in reactors, heat exchangers, columns, and process piping. Before finalizing refinery fasteners for export to Africa, USA, Mexico, Oman, or Europe, our technical team recommends evaluating four key factors:
If you are unsure which refinery fasteners best suit your application, our technical team is available to review your piping specifications, process data, and project requirements — and recommend the most suitable bolting solution for your region.
We have exported refinery fasteners to buyers across Africa, USA, Mexico, Oman, and Europe — building an export track record that reflects reliability, compliance, and on-time delivery.
Every refinery fastener export 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 exported refinery fasteners comply with ASTM A193, A194, A320, ASME B18.2.1, B18.2.2, and NACE MR0175/ISO 15156 standards — ensuring that products meet the exact specifications of international refinery projects and clear customs without delays.
Refinery fasteners 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 international destination.
We support a range of Incoterms — FOB, CIF, CFR, EXW, DAP — and coordinate with trusted freight partners for sea, air, and multimodal export shipments to major ports across Africa, USA, Mexico, Oman, and Europe based on buyer preference.
Our export support team assists international buyers with fastener selection, material grade selection, documentation, customs coordination, shipping updates, and post-delivery follow-up — ensuring a smooth experience at every stage of refinery fastener export.
Repsol Steel LLP exports refinery fasteners to a wide range of process units across Africa, USA, Mexico, Oman, and Europe where high-integrity bolting and reliable connections are essential for safety and operational reliability.
A193 B7 and B16 bolting exported for preheat exchangers, columns, and process piping in crude distillation units.
A193 B7 and B16 bolting exported for reactors, regenerators, and high-temperature process piping in FCC units.
B7M and B16 bolting exported for high-pressure and high-temperature hydrogen service in hydrocrackers and hydrotreaters where hydrogen and H2S resistance is critical.
A193 B7 and B16 bolting exported for high-temperature and high-pressure service in delayed cokers and visbreaking units.
A193 B7 and B8M bolting exported for shell and tube, plate, and spiral heat exchangers in refinery service.
A193 B7 with A194 2H bolting exported for steam lines, water systems, and utility piping throughout the refinery.
Refinery fasteners exported 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 fasteners supplier for refinery projects for procurement teams, EPC contractors, and maintenance projects. Our export documentation, packaging, and standard compliance are structured for smooth cross-border supply to buyers across Africa, USA, Mexico, Oman, and Europe — ensuring your refinery fasteners arrive on time, in specification, and ready for installation.
Africa: Refinery, petrochemical, mining & industrial projects
USA: Gulf Coast, refinery, petrochemical & power generation supply
Mexico: Refinery, petrochemical & power industry supply
Oman: Refinery, petrochemical, upstream & gas processing projects
Europe: Refinery, petrochemical, chemical & power industry supply
All refinery fasteners are exported with material certificates, dimensional inspection reports, PMI testing, Certificate of Origin, and third-party certification as required by project specifications.
We supply a comprehensive range of refinery fasteners including A193 B7, B7M, B16, B8, B8M stud bolts, A194 2H, 2HM, 8, 8M heavy hex nuts, A320 L7, L7M bolting, and exotic alloy fasteners (Alloy 625, 718, Duplex, Titanium) — in imperial and metric sizes.
We export refinery fasteners to Africa, USA, Mexico, Oman, and Europe — covering refinery, petrochemical, chemical processing, power generation, and industrial projects.
We provide complete export documentation — Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin, and Material Test Certificates (MTC to EN 10204 3.1). PMI testing, hardness testing, impact testing, and third-party inspection reports (SGS, BV, TUV, Intertek) are available on request.
A193 B7 is standard high-strength bolting for high-temperature service with hardness up to 35 HRC. A193 B7M is the sour service version with hardness limited to 22 HRC max and is the only acceptable grade when sour service is specified per NACE MR0175.
Yes. We offer custom sizes, materials, fastener configurations, thread types, and coatings based on drawings, piping specifications, and project requirements — with quick turnaround times for export orders.
Send us your refinery fastener specifications, material requirements, or drawings. Our export team will respond within 24 hours with a tailored quotation and export documentation details for Africa, USA, Mexico, Oman, or Europe.
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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