Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

ASTM A53 Carbon Steel Pipe Specifications

ASTM A53 Carbon Steel Pipe Specifications

Specifications A/SA53 NPS 1/4" - 30" Schedules 10 through 160, STD, XH and XXH


Covers Seamless and Welded, Black and Hot-Dipped Galvanized nominal
(average) wall pipe for coiling, bending, flanging and other special purposes
and is suitable for welding. Continuous-Welded pipe is not intended for flanging.
Purpose for which pipe is intended should be stated on order.

Chemical Requirements

    Type S 
  Type E   Type F
resistance welded)
welded pipe)
  Grade A Grade B   Grade A Grade B   Grade A
Carbon max.  0.25% 0.30%   0.25% 0.30%   0.3%
Manganese 0.95 1.2%   0.95% 1.2%   1.2%
Phosphorous, max. 0.05% 0.05%   0.05% 0.05%   0.05%
Sulfur, max.  0.045% 0.045%   0.045% 0.045%   0.045%
Copper, max. 0.40% 0.40%   0.40% 0.40%   0.4%
Nickel, max.  0.40% 0.40%   0.40% 0.40%   0.4%
Chromium, max.  0.40% 0.40%   0.40% 0.40%   0.4%
Molybdenum, max.  0.15% 0.15%   0.15% 0.15%   0.15%
Vanadium, max.  0.08% 0.08%   0.08% 0.08%   0.08

ASTM A53 Carbon Steel Pipe

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

For NPS 1 1/2 and Smaller Sizes   For NPS 2 and Larger Sizes
1/64"   1/32" under   1% over   1%under


Mechanical Tests Specified

Tensile Test -- Transverse required on ERW for NPS 8 and large.

Sending Test (Cold) -- STD and XS-NPS 2 and under XXS-NPS 1 1/4 and under.


  Degree of Bend   Diameter of Mandrel
For Normal A53 Uses 90   12 x nom dia. of pipe
For Close Coiling 180   8 x nom dia. of pipe

Flattening Test -- NPS 2 and larger STD and XS. (Not required for XXS pipe.)


Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.


Number of Tests Required

Seamless and Electric-Resistance-Welded -- Bending, flattening, tensile on one length of pipe from each lot of 500 lengths or less of a size.

Continuous-Weld -- Bending, flattening, tensile

NPS 1 1/2 & smaller   NPS 2 & larger
one / 25 tons   one / 50 tons


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