Flanges in Oil and Gas Industry: Standards, Materials, Best Practices
Flanges in Oil and Gas Industry
Published: April 10, 2026 | Category: Industry Applications
Operating Conditions
Pressure: 150-15,000 PSI | Temperature: -60°C to 650°C | Media: H₂S, CO₂, chlorides
Key Standards
- ASME B16.5 – Pipe Flanges (1/2″ to 24″)
- ASME B16.47 – Large Diameter (26″ to 60″)
- API 6A – Wellhead Equipment
- NACE MR0175 – Sour Service (H₂S)
- PED 2014/68/EU – European Directive
Materials
Carbon Steel: A105, A350 LF2/LF3
Stainless: 316/L, 321, 347, 904L, 2205
Special Alloys: Inconel 625, Hastelloy C276
Sour Service (H₂S)
NACE MR0175: Max 22 HRC, SSC testing required
Offshore Requirements
Corrosion protection: HDG, TSA
Certifications: DNV-GL, ABS, NORSOK
Songhai Capabilities
- Sizes: 1/2″ to 60″ (120″ custom)
- Pressure: 150# to 2500#
- Certifications: ISO 9001, PED, NACE
- Lead Time: 7-30 days
Contact our team for oil and gas projects!
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