ASTM & EN SPECIFICATION & TOLERANCE

ASTM Specification for Stainless Steel Tubes & Pipes
SpecificationsAllowable outside Diameter Variations in mmAllowable Wall Variations in %.Exact Length Tolerances in mmTesting
DiameterOverUnderOverUnderOverUnder
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
1010
10
15
10
1010
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