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Mechanical Pipes

ASTM A-53 GR. A & B -Technical Data (schedule 40)

Size
(Inches)
Diameter Specified Outside Diameter
(mm)
Specified Wall Thickness (mm) Mass of Plain end Pipe
(Kg/Mtr)
Test Pressure
(Mpa)
Grade A Grade B
1/2" 15 21.3 2.77 1.27 4.8 4.8
3/4" 20 26.7 2.87 1.69 4.8 4.8
1" 25 33.4 3.38 2.5 4.8 4.8
1 1/4" 32 42.2 3.56 3.39 8.3 9.0
1 1/2" 40 48.3 3.68 4.05 8.3 9.0
2" 50 60.3 3.91 5.44 15.9 17.2
2 1/2" 65 73.0 5.16 8.63 17.2 17.2
3" 80 88.9 5.49 11.29 15.3 17.2
3 1\2" 90 101.6 5.74 13.57 14.0 16.3
4" 100 114.3 6.02 16.07 13.1 15.2
5" 125 141.3 6.55 21.77 11.5 13.4
6" 150 168.3 7.11 28.26 10.5 12.3
Tolerances

Outside Diameter               Pipe Size upto & including DN 40      +/- 0.4 mm of od
  
                                                Pipe Size Dn 50 or larger                 +/- 1% of OD

Thickness                             -12.5%(max) / +not more than 10% of weight

Weight                                  +/- 10%

Testing

Online NDT                           for Pipes NPS 2 (DN 50) or Larger

Weld seam or each pipe shall be tested by Eddy current

Bend Test                             for Pipes upto & including DN 50

Bending Angle                   90°

Bending Radius                 12 times to the OD of tube (no crack in body & weld)

Flattening                            (0° and 90°)       For Pipes over DN 50

1.Flatten upto 2/3 of OD for ductillity of weld

2.Flatten upto 1/3 of OD for ductillity of steel

3.Full Flattening for testing of lamination or Unsound material

Mechanical Properties
Grade A                                       Grade B

Yield Strength                             205 Mpa(Min)                               240 Mpa (Min)

Tensile Strength                          330 Mpa (Min)                              415 Mpa (Min)

Elongation                                   As per ASTM A-53

Chemical Composotion (Max %):

Carbon Manganese Phosphorus Sulphur Copper Nickel Chromium Molybdenum Vanadium
Grade A 0.25 0.95 0.05 0.045 0.5 0.4 0.4 0.15 0.0.8
Grade B 0.3 1.2 0.05 0.045 0.5 0.4 0.4 0.15 0.0.8

A-53 with test method ASTM A

(55 microns approx)

(70 microns approx)

(79 microns approx)

standard & client requirements.

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