ASTM A53 SEAMLESS PIPE and WELDED PIPE Technical Specs
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Specification A53 covers Seamless and Welded, black and hot-dipped galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding. Threaded and coupled pipe is available.
| State Pipe Stocks: | |
|---|---|
| 1/8” to 10” | Welded Grade A |
| 2” to 26” | Welded Grade B |
| 28" to 48" | DSAW API |
| 1/8” to 24” | Seamless Grade B |
General Description
Specification A53 covers Seamless and Welded, black and hot-dipped galvanized nominal (average) wall pipe for coiling, bending, flanging, and other special purposes and is suitable for welding.
Mechanical Properties - Tensile Requirements
| Seamless and ERW | Grade A | Grade B |
|---|---|---|
| Tensile Strength, min., psi | 48,000 | 60,000 |
| Yield Strength, min., psi | 30,000 | 35,000 |
Chemical Requirements
| Seamless and ERW | C max % | Mn max % | P max % | S max % |
|---|---|---|---|---|
|
Grade A
|
0.25 | 0.95 | 0.05 | 0.045 |
|
Grade B
|
0.30 | 1.20 | 0.05 | 0.045 |
Testing Requirements
-
Hydrostatic Testing
Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of Seamless and Electric Resistance Weld Pipe. -
Mechanical Tests
Tensile Test Transverse required on ERW for NPS 8 & larger. Flattening Test For NPS 2 and larger, STD and XS walls.
(Not required for XXS pipe)Bending Test (cold) For NPS 2 and under, XS wall and under
For NPS 1 1/4 and under, under XXS wall. -
Degree of Bend Diameter of Mandrel For Normal A53 Uses90 12 x dia. of pipe For Close Coiling180 8 x dia. of pipe
