Specifications and dimensions
- Pipe ordered by nominal size and schedule or outside diameter and wall thickness
- Seamless and welded construction controlled by different product specifications
- Plain, beveled, threaded, or otherwise prepared ends
Reviewed technical and procurement guidance · 3 August 2026
Stainless Steel Pipe
A specification guide to seamless and welded stainless pipe for pressure and process service, including dimensions, heat treatment, testing, and ends.
02Product form
Continue by product form or grade
Common grades
Grade + product
304L Stainless Steel Pipe
Low-carbon austenitic stainless pipe for welded systems in moderate corrosion service; distinguish seamless or welded construction, dimensions, ends, heat treatment, and testing.
→Grade + product316L Stainless Steel Pipe
Low-carbon molybdenum-bearing stainless pipe for chemical, food, pharmaceutical, and water-treatment lines; confirm medium, pressure class, construction, and examination.
→Grade + product2205 Duplex Stainless Steel Pipe
Duplex stainless pipe for chloride, seawater, and strength-critical process systems; specify product standard, solution treatment, weld examination, and phase-balance controls.
→Standards and supply condition
- ASTM A312/A312M
- ASTM A358/A358M
- EN 10216-5
- EN 10217-7
Manufacturing and processing
- Seamless hollows are hot worked and finished to size before heat treatment.
- Welded pipe is formed from flat product and longitudinally welded, heat treated, finished, and tested as ordered.
Typical applications
- Chemical and petrochemical piping
- Food and pharmaceutical lines
- Water treatment
- Marine and high-temperature process service
Quality and acceptance controls
- Verify the heat or coil number and material test certificate against the ordered grade and product standard.
- Confirm dimensions, tolerances, surface condition, permitted repair, marking, and traceability.
- Agree inspection, export packing, moisture protection, document language, and third-party witness points before production.
Include in your RFQ
- Grade and governing product specification
- Dimensions, tolerances, and ordered quantity
- Condition, finish, edge, end, or processing route
- Required testing, inspection, and certification
- Packing, marking, and traceability requirements
- Destination and required delivery date
Selection limits
- Grade name alone does not define product form, governing specification, dimensions, finish, inspection, or fitness for the service environment.
- Published ranges and reference guidance are not stock promises or purchase acceptance criteria; the ordered specification and certificate control.
3 August 2026
Sources and technical review
RFQ support
Stainless Steel Pipe
A specification guide to seamless and welded stainless pipe for pressure and process service, including dimensions, heat treatment, testing, and ends.