ASTM A135 is a standard issued by the American Society for Testing and Materials (ASTM) that specifies the requirements for welded carbon steel pipes, specifically electric resistance welded (ERW) welded steel pipes. ASTM A135 ERW steel pipe covers two grades, Grade A and Grade B, which are mainly used to transport gas, steam, water or other liquids, especially suitable for fire sprinkler pipes. Continue reading to learn more about ASTM A135 Grade A and Grade B ERW steel pipe.
Chemical and Physical Testing Analysis of ASTM A135 Grade A And Grade B ERW Steel Pipe:
ASTM A135 Grade A ERW Steel Pipe:
|
Feature |
Grade A |
|
Yield Strength (psi) |
30,000 min |
|
Tensile Strength (psi) |
48,000 min |
|
Elongation % |
Determined by formula |
|
Hydrostatic(psi) if required |
Determined by formula |
|
Carbon % |
0.25 max |
|
Manganese % |
0.95 max |
|
Phosphorous % |
0.035 max |
|
Sulfur % |
0.035 max |
ASTM A135 Grade B ERW Steel Pipe:
|
Feature |
Grade B |
|
Yield Strength (psi) |
35,000 min |
|
Tensile Strength (psi) |
60,000 min |
|
Elongation % |
Determined by formula |
|
Hydrostatic(psi) if required |
Determined by formula |
|
Carbon % |
0.30 max |
|
Manganese% |
1.20 max |
|
Phosphorous % |
0.035 max |
|
Sulfur % |
0.035 max |
Tolerances for ASTM A135 ERW Steel Pipe:
- Thickness: The minimum wall thickness at any point should be greater than 12.5% of the specified wall thickness.
- Outer Diameter: The outer diameter shall not deviate more than +-1% from the specified normal dimensions.
- Weight: The weight of the pipe shall not exceed +-10% of the specified weight.
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