H2S
3 in-depth engineering guides on H2S — specification, selection, testing and procurement.
Everything on H2S
Vajra's engineering team has published 3 technical guides covering H2S for industrial valve selection, specification, testing and procurement. Browse the full set below.
Valves for H₂S Sour Service - NACE MR0175/ISO 15156 Material Requirements
H₂S (hydrogen sulphide) is present in sour crude oil and natural gas streams, and at concentrations above the NACE sour threshold it causes rapid materials failures - sulfide stress cracking (SSC) and hydrogen-induced cracking (HIC). This guide explains NACE MR0175/ISO 15156 material requirements for valves in sour service.
NACE MR0175 Sour Service: H₂S, Hardness Limits & Material Requirements
NACE MR0175 / ISO 15156 is the mandatory standard for all metallic components in oilfield production environments containing H₂S. Non-compliance leads to sudden brittle fracture - Sulphide Stress Cracking (SSC) or Hydrogen-Induced Cracking (HIC). This guide explains H₂S thresholds, hardness limits, CRA selection, and NACE-compliant valve specification.
NACE MR0175 / ISO 15156 Valves for Sour Service: H2S and SSC Guide
Hydrogen sulphide (H2S) in wet sour gas and crude oil environments causes sulphide stress cracking (SSC) - a sudden, brittle fracture mode that has catastrophically failed standard carbon and alloy steel valves. NACE MR0175 / ISO 15156 defines the material requirements to prevent SSC in sour oil and gas service.
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