Hot-finished pipe need not be heat treated. When hot-finished pipes is heat treated, it shall be treated at a temperature of 650℃ or higher.
Bending test required.
Flattening test is not required.
Hydrostatic test is not mandatory.
As an alternative to the hydrostatic test at the option of the manufacturer or where specified in the PO, it shall be permissible for the full body of each pipe to be tested with a nondestructive electric test.
As an alternative to the hydrostatic test at the option of the manufacturer or where specified in the PO as an alternative or addition to the hydrostatic test, the full body of each pipe shall be tested with a nondestructive electric test in accordance with Practice E213, E309 or E570. In such cases, the marking of each length of pipes shall include the letters NDE.
The minimum wall thickness at any point shall not be more than 12.5% under the specified wall thickness.
Lengths: if definite lengths are not required, pipe may be ordered in single random lengths or in double random lengths meeting the following requirements:
single random lengths shall be 4.8m to 6.7 m
double random lengths shall have a minimum average length of 10.7m and shall have a minimum length of 6.7m
Since its establishment, our factory has been developing first world class products with adhering the principle
of quality first. Our products have gained excellent reputation in the industry and valuabletrusty among new and old customers..