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.