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TECHNICAL INFORMATION
Carbon Steel Pipe/Plates
Special Formula
Condensed ASTM Specification for SS Tubing & Piping
Square & Rectangular Section Size & Weight
Alloy Steel Pipe/Plates

Specification Allowable Outside Diameter Variations in mm  Allowable Wall Thickness Variations Exact Length Tolerances in mm Testing
ASTMA - 312 Seamless & Welded Pipe 3.175 - 38.1 incl. 0.4 0.79 Minimum Wall  6.4 0 Tension Test
38.1 - 101.6 incl. 0.79 0.79 12.5% under  6.4 0 Flattering Test
101.6 - 203.2 incl. 1.59 0.79 nominal wall specified 6.4 0 100% Hydrostatic Test 
Refer to ASTMA-530
ASTMA - 213 Seamless Boiler Superheater and Heat Exchanger Tubes Nominal Diameter Over Under %Over %Under Over Under   
Under 25.4 0.1016 0.1016 20 0 3.175 0 Tension Test
25.4 - 38.1 incl. 0.1524 0.1524 20 0 3.175 0 Flattering Test
38.1 - 5.8 excl. 0.2032 0.2032 22 0 3.176 0 Flare Test
50.8 - 63.5 excl. 0.254 0.254 22 0 4.76 0 Hardness Test
63.5 - 76.2 excl. 0.3048 0.3048 22 0 4.76 0 100% Hydrostatic Test
76.2 - 101.6 incl.  0.381 0.381 22 0 4.76 0 Refer to ASTMA - 50 
 
ASTMA A - 249 Welder Boiler Superheater Heat Exchanger and Condenser Tubes Under 25.4 0.1016 0.1016 10 -10 3.175 0 Tension Test
25.4 - 38.1 incl. 0.1524 0.1524 10 -10 3.175 0 Flattering Test
38.1 - 50.8 excl. 0.2032 0.2032 10 -10 3.175 0 Flare Test
50.8 - 63.5 excl. 0.254 0.254 10 -10 4.76 0 * Reserve Bend Test
63.5 - 76.2 excl. 0.3048 0.3048 10 -10 4.76 0 Hardness Test
76.2 - 101.6 excl. 0.381 0.381 10 -10 4.76 0 100% Hydrostatic Test
  Reverse Flattering Test Refer to ASTMA A-450 wherever applicable
ASTMA - 269Seamless & WeldedTubing for GeneralService UPTO 12.7 0.13 0.13 15 -15 3.2 0 Flare Test
12.7 - 38.1 excl. 0.13 0.13 10 -10 3.2 0 Flange Test (Welded Only)
38.1 - 88.9 excl. 0.25 0.25 10 -10 4.8 0 Harness Test
88.1 - 139.7 excl. 0.38 0.38 10 -10 4.8 0 Reverse Flattering Test 
139.7 - 203.2 excl. 0.76 0.76 10 -10 4.8 0 (Welded Only)
                100% Hydrastatic Test Refer to ASTMA - 269