ASTM & EN SPECIFICATION & TOLERANCE

ASTM Specification for Stainless Steel Tubes & Pipes
Specifications Allowable outside Diameter Variations in mm Allowable Wall Variations in %. Exact Length Tolerances in mm Testing
Diameter
Over
Under
Over
Under
Over
Under
ASTM A-213 Seamless Ferritic & Austenitic steel,
Boiler & Superheater Tubes & Austenitic steel Heat Exchange Tubes.
Under 25.4
25.4 - 38.1 incl.
38.1 - 50.8 excl.
50.8 - 63.5 encl.
63.5 - 76.2 excl.
76.2 - 101.6 incl.
0.1016
0.1524
0.2032
0.2540
0.3084
0.3810
0.1016
0.1524
0.2032
0.2540
0.3084
0.3810
20
20
22
22
22
22
0
0
0
0
0
0
3.175
3.175
3.175
3.760
4.760
4.760
0
0
0
0
0
0
  • Tension Test

  • Flattening Test

  • Flare Test

  • Hardness Test

  • 100% Hydrostatic or Eddycurrent or Ultrasonic Test

  • ASTM A-269 Seamless & Welded Austenitic steel,
    Tubing for general service.

    Under 12.7
    12.7 - 38.1 excl.
    38.1 - 88.9 excl.
    88.9 - 139.7 excl.
    139.7 - 203.2 excl.
    0.13
    0.13
    0.25
    0.38
    0.76
    0.13
    0.20
    0.25
    0.28
    0.38
    15
    10
    10
    10
    10
    15
    10
    10
    10
    10
    3.2
    3.2
    4.8
    4.8
    4.8
    0
    0
    0
    0
    0
  • Flare Test (Seamless Only)

  • Hardness Test

  • 100% Hydrostatic or Eddycurrent or Ultrasonic Test

  • ASTM A-270 Seamless & Welded Austenitic steel for Sanitaru Tubing.
    Under 25.4
    25.4 - 38.1 excl,.
    50.8 - 76.2 excl.
    76.2 - 101.6 excl.
    0.13
    0.20
    0.25
    0.38
    0.13
    0.20
    0.25
    0.38
    12.5
    12.5
    12.5
    12.5
    12.5
    12.5
    12.5
    12.5
    3.2
    3.2
    3.2
    3.2
    0
    0
    0
    0
  • Reverse Flattening Test

  • 100% Hydrostatic or Eddycurrent or Ultrasonic Test

  • External Polish on all tubes
  • ASTM Specification for Stainless Steel Tubes & Pipes