Oil & gas and petrochemical supply

Oil & Gas Fasteners | Certified Bolting for Critical Equipment

Industrial stud bolts and heavy hex nuts for pressure equipment, flanges, valves, piping and maintenance projects.

Pressure equipment boltingNACE MR0175ASTM A193/A320EPC procurement

Quick answer

LOKRON supplies oil and gas fasteners in ASTM A193, A320 and A194 grades, with project-specific coatings, NACE MR0175 documentation, PED support and EN 10204 3.1 material traceability where required.

Specification and supply scope

Core grades	A193 B7/B7M/B16/B8/B8M, A320 L7/L7M and A194 2H/7/8/8M, subject to service conditions.
Applications	Flanges, valves, pressure vessels, heat exchangers, pipelines and maintenance replacement sets.
Service review	Temperature, pressure, sour service, corrosion, impact testing and coating compatibility reviewed before quotation.
Traceability	Heat/lot identification, MTR and inspection package supplied with the order.
Custom supply	Non-standard sizes, special alloys, drawing-based parts and project marking available.

Typical applications

✓Refinery and petrochemical process piping
✓Oil and gas pressure vessels and heat exchangers
✓Wellhead, valve and flange assemblies
✓EPC, MRO and replacement fastener packages

Documentation available

✓EN 10204 Type 3.1/3.2 documentation
✓NACE MR0175/ISO 15156 declarations when applicable
✓PMI, hardness, impact and dimensional reports
✓Coating and third-party inspection records

Related engineering resources

NACE materials list

Review material and hardness considerations for sour service.

Certifications

See the quality and compliance documentation scope.

Request an EPC quote

Send your grade, size, quantity and delivery requirements.

Need a grade, drawing or complete bolting set?

Send the standard, size, quantity, coating and service condition. LOKRON's technical sales team can confirm scope and documentation within 24 hours.

Request a technical quote

Frequently asked questions

What documents are important for oil and gas fasteners?

The usual package includes an MTR, heat traceability, dimensional and hardness inspection, plus NACE, impact, PMI, coating or third-party records when the project requires them.

Does NACE compliance apply to every oil and gas fastener?

No. It depends on sour-service conditions, material, hardness and the applicable project specification. Confirm the H2S environment before selecting the grade.

Can LOKRON quote complete flange bolt sets?

Yes. Provide flange size/class, stud grade and size, nut grade, gasket/service condition, coating and quantity.