sour service
3 in-depth engineering guides on sour service — specification, selection, testing and procurement.
Everything on sour service
Vajra's engineering team has published 3 technical guides covering sour service 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.
Related topics
Need valves engineered for sour service?
Our engineering team writes these guides and supplies the valves. Send your requirement for a specification review and a 24-hour quote.