Pipeline Works
- Carbon & Carbon Alloy Steel
- Stainless Steel
- Copper & Nickel Alloy
- Heat Efficiency Tubes
- Pipe Fittings
- Pipe Flanges
- Gasket, Stud Bolt &Nut
- Industrial Valves
01
ASTM A269/A269M Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service
Ordering Information
Buyers should include:
● Quantity (length, number of pieces)
● Material grade (e.g., TP304, TP316)
● Dimensions (OD, wall thickness)
● Condition (annealed, cold-worked)
● Test requirements (hydrostatic, nondestructive testing)
● Certification or special marking needs
Steel Grades & Chemical Composition
Common austenitic grades include:
- TP304, TP304L, TP316, TP316L, TP321, TP347, etc.
- Composition limits for carbon, chromium, nickel, molybdenum, and other elements are specified per ASTM A959.
Mechanical Properties
- Tensile strength, yield strength, elongation requirements vary by grade and condition (annealed/cold-worked).
- Hardness limits may apply.
Manufacturing & Process Requirements
- Seamless tubing: Produced by piercing/extrusion.
- Welded tubing: Made via automatic welding without filler metal; weld seams must be heat-treated.
Inspection & Testing
- Hydrostatic or nondestructive testing (NDT): Required unless waived.
- Flattening, reverse bend, or flange tests: For welded tubing.
- Intergranular corrosion test (if specified): Per ASTM A262.
- Certification: Mill test reports must comply with the standard.
Surface Finish & Defects
- Tubing must be free of scale, cracks, and imperfections detectable by visual inspection.
- Minor imperfections removable within wall thickness limits are permitted.
Certification & Marking
- Each tube must be marked with manufacturer’s name, grade, heat number, size, and standard designation (A269 or A269M for metric).
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