Industry Application Guide

Pipe Flanges & Fittings for Oil & Gas Industry

Flanges & fittings for oil & gas upstream, midstream & downstream: NACE MR0175/ISO 15156 sour service, high-pressure RTJ, duplex & super duplex. Quote in 30 min.

Industry Sector Overview

Remax Forge manufactures high-integrity forged flanges engineered for severe upstream drilling, offshore production risers, midstream cross-country gas pipelines, and downstream oil refineries.

Critical Operating Challenges & Design Constraints

High-pressure sour gas containing H2S and CO2 leading to sulfide stress cracking
Subsea high-pressure high-temperature (HPHT) deepwater environments
Cyclic thermal stresses and pressure pulsation in refinery catalytic units

Recommended Material Grade Selection Matrix

Material GradeSpecific Application & Fluid Service
ASTM A105 / A350 LF2Standard hydrocarbons & low-temp transport
ASTM A182 F51 / F53Offshore seawater injection & subsea risers
Inconel 625 CladExtreme sour gas wellheads (NACE MR0175)

Recommended Flange Types

Weld Neck Flanges with Ring Type Joint (RTJ) facings
Heavy Hex Bolt Blind Flanges for pipeline pig traps
Long Weld Neck Nozzle Flanges for refinery pressure vessels

Recommended Material & Product Guides

Carbon Steel A105 / LF2Super Duplex 2507ASME B16.5 Standard

Industry FAQs

Q: What testing is performed for NACE MR0175 sour service flanges?

A: Sour service flanges undergo restricted hardness testing (22 HRC / 237 HBW max), HIC (Hydrogen Induced Cracking) test per NACE TM0284, and SSCC (Sulfide Stress Corrosion Cracking) test per NACE TM0177.

Sector Specific Inquiry

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