Stainless Steel Pipe & Tube for Oil & Gas

Oil and gas service covers a wider range of conditions than almost any other industry on this list -- from dry sweet gas at ambient temperature to wet sour crude at elevation. The grade that suits one stream can fail quickly in another, so selection here is driven by the specific fluid composition rather than by the sector name.

What drives material selection here

Chlorides in produced water and in offshore atmospheres
Hydrogen sulphide (sour service), which changes the selection rules entirely
Elevated temperature and pressure in process and flowline duty
CO₂ and the carbonic acid it forms in the presence of water
Consequence of failure -- much of this duty is hard to reach and dangerous to leak

Grades commonly specified

Grade selection guidance for this service. Confirm against your own process conditions.
Grade	Why it is specified
316 / 316L	The common choice for process and utility lines where chlorides are present but conditions are not sour. 316L where the line will be welded.
321	Where sustained elevated temperature would sensitise an unstabilised grade -- the titanium stabilisation addresses exactly that.
347H	High-temperature duty where creep strength matters; the controlled carbon range is what provides it.
304 / 304L	Utility, instrument air and non-corrosive service where specifying 316 would be paying for molybdenum you do not need.

Standards this sector commonly specifies

ASTM A312 / ASME SA312
ASTM A213 / ASME SA213
ASME B36.19M
EN 10204 3.1

These are the specifications buyers in this sector typically call for. Material is supplied against the specification stated on your order — confirm the standard and certificate type at enquiry stage. See mill test certificates and EN 10204 types.

Worth knowing before you specify

Sour service is a separate conversation. Where H₂S is present, materials selection is governed by NACE MR0175 / ISO 15156, and the standard austenitic grades on this page may not be acceptable regardless of how well they perform in sweet service. If your line is sour, tell us at enquiry stage -- we would rather say the grade is wrong than supply it.

Tell us the duty, not just the grade

The fastest route to a useful quotation is the service conditions. For this application that means:

Fluid composition, including H₂S and CO₂ if present
Operating temperature and pressure
Chloride concentration
Applicable specification and certificate type

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