MATERIALS & SERVICE ENVIRONMENT
Tubular Requirements for Sour Service
Sour service cannot be defined by the words ‘H₂S service’ alone. Material selection and qualification depend on the complete environment, applied stress, temperature, product form, manufacturing route and governing criteria.
Characterize the environment
The purchaser or design authority should define the chemical and operating envelope used to determine whether sour-service requirements apply.
- H₂S partial pressure or equivalent basis
- CO₂, chlorides, pH and water phase
- Operating and upset temperature
- Pressure, stress and exposure duration
Connect strength and hardness
Higher strength can increase susceptibility to environmentally assisted cracking. Grade, heat treatment and hardness acceptance need to be considered together.
- Specified minimum yield strength
- Heat-treatment route and uniformity
- Hardness limits and test locations
- Product-form and wall-thickness effects
Define supplementary testing
SSC, HIC, SOHIC or corrosion testing may be required. Test method, solution, stress level, specimen orientation and acceptance criteria must be stated.
- Applicable test standard and edition
- Sampling location and orientation
- Test environment and duration
- Acceptance and retest rules
Preserve traceability
Material identity, heat treatment, testing, marking and final records must remain connected to the released product.
- Heat and product traceability
- Process and hardness records
- Supplementary test reports
- Inspection release and final dossier
ENQUIRY CHECKLIST
Information to prepare.
Use this list as an initial procurement guide. The governing design and purchase documents remain authoritative.
Send Your Requirement- 01Complete fluid composition and operating envelope
- 02Governing sour-service standard and clauses
- 03Required grade, product form and heat treatment
- 04Hardness limits and measurement method
- 05Supplementary tests and acceptance criteria
- 06Traceability, inspection and document requirements