we have obtained ISO 9001, ISO 14001, ISO 45001, CE, AAA-level credit rating certification, etc.
This specification covers two grades ofelectric resistance-welded steel pipein NPS 2 to NPS 30 [DN 50 to DN 750] inclusive, with nominal (average) wall thickness up to 0.500 in. [12.70 mm], inclusive, and in nominal sizes NPS 3⁄4 to NPS 5 [DN 20 to DN 125] inclusive with nominal (average) wall thickness 0.083 in. [2.11 mm] to 0.134 in. [3.40 mm], depending on size. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. The pipe is intended for conveying gas, vapor, water or other liquid; only Grade A is adapted for flanging and bending (Note 2). The suitability of pipe for various purposes is somewhat dependent upon its dimensions, properties, and conditions of service, so that the purpose for which the pipe is intended should be stated in the order. The pipe may be furnished either non expanded or cold expanded at the option of the manufacturer. When pipe is cold expanded, the amount of expansion shall not exceed 1.5 % of the outside diameter pipe size.
|
Grades |
Description |
|
Grade A |
- |
|
Grade B |
- |
Chemical Properties
|
Element |
Grade A |
Grade B |
|
Carbon |
0.25 |
0.30 |
|
Manganese |
0.95 |
1.20 |
|
Phosphorus |
0.035 |
0.035 |
|
Sulfur |
0.035 |
0.035 |
Note: [A] The total composition for these five elements shall not exceed 1.00 %.
Mechanical Properties
|
rades |
Tensile strength, min, psi [MPa] |
Yield strength, min, psi [MPa] |
Elongation in 2 in. or 50 mm |
||
|
For pipe having a specified wall thickness of 5⁄16 in. [7.9 mm] or more |
For pipe having a specified wall thickness of less than 5⁄16 in. [7.9 mm] |
For pipe of any size |
|||
|
Grade A |
48 [330] |
30 [205] |
35 |
A |
35 |
|
Grade B |
60 [415] |
35 [240] |
30 |
B |
30 |
