Industry sheet · upstream, terminal & gas
Oil & gas.
The industry that writes the most demanding valve specifications, and expects the paperwork to match.
- Sour
- NACE MR0175 / ISO 15156 material limits, where the line names H₂S
- Fire-safe
- API 607 or API 6FA type-tested design, where the spec asks for it
- Pipeline
- API 6D for pipeline valve duty; API 600 for refinery gates
- Note
- Published reference designations only. Your PO and the current edition govern
Oil and gas services put valves against hydrocarbons, pressure and, in sour fields, hydrogen sulphide. Specifications lean on API standards, fire-safe design and NACE MR0175 material limits. NF Teguh is a Petronas registered vendor supplying gate, globe, ball, plug, butterfly and check valves for Malaysian upstream, terminal and natural gas services.
What makes oil and gas duty different
Three things separate an oil and gas valve list from a general-industry one. The medium: hydrocarbons, flammable and sometimes sour, so sealing and material selection carry more of the specification. The pressures: wellhead and pipeline classes run high, and the class-by-temperature arithmetic of ASME B16.34 is exercised in earnest. The consequences: a passing leak on a hydrocarbon line is a safety event, so the industry leans on type-tested designs and documented testing.
The result is a specification culture built on API standards and named paperwork. NF Teguh supplies all six valve families: gate, globe, ball, plug, butterfly and check, into Malaysian oil and gas, terminal, offshore and natural gas services. State the standard your line works to, and the quotation answers in the same language.
Sour service and material limits
Where produced fluid carries hydrogen sulphide, ordinary high-strength steels can fail by sulphide stress cracking. NACE MR0175 / ISO 15156 limits which materials, at which hardness and in which condition, may sit in sour service. When a valve line names it, the requirement reaches the whole assembly, not just the shell.
On an enquiry, sour service is a single decisive line: “NACE MR0175 applies.” Write it per line item: a sour manifold and a sweet utility header often share one requisition. What the designation demands of each part is unpacked in the sour service memo.
Fire-safe requirements
Soft-seated valves seal beautifully until a fire destroys the polymer seat. A fire-safe design limits the leakage that follows: metal secondary seats take over as the soft seat burns away, and stem and body joints stay tight. The claim is proved by type test, not by drawing review.
Two designations carry the requirement: API 607 for quarter-turn soft-seated valves, API 6FA for the fire test of valves in the API 6A/6D world. Which one your specification should name is the subject of the fire-safe memo. Name the designation your spec names; “fire-safe” alone leaves the question open.
Typical valve selections by system
The same six families recur, sorted by system. Separation and processing trains run on gate valves for block duty and globes where flow is regulated. Metering and export lines want the fast shutoff of ball valves, with check valves guarding pumps and compressors. Tank-farm manifolds mix gates with large-bore butterflies. Dirty, waxy or abrasive streams are where plug valves earn their keep.
None of this replaces your line list. It is the pattern the counter reads behind one. State the reason for any departure and the right alternative is quoted first time.
What an oil and gas enquiry states
- Size & pressure class, per line
- End connection & flange standard
- Body & trim material
- Sour service: state if NACE MR0175 applies
- Fire-safe: name API 607 or API 6FA if required
- Test & certification required
- Design std
- Name it where your spec does: API 600, API 6D, BS 5351 and kin
- Service
- Fluid, temperature, H₂S if present: the three facts behind every material answer
- Route
- How ordering works, in three steps
- Counter
- Phone, email or WhatsApp
Paperwork this industry expects
Oil and gas procurement runs on documents: EN 10204 3.1 material certificates for pressure-retaining parts, API 598 test reports for the finished valve, and the fire-safe type-test certificate where the specification asked for it. All of it is cheap to require on the purchase order and slow to reconstruct afterwards. Name the papers with the order. The full picture is in the procurement documentation guide.
API, NACE, ISO and EN designations on this sheet are published reference data, not a claim about any particular valve or certification. Confirm against the current edition; your purchase order governs.