ASTM A53 is one of the standards of the American Society for Testing and Materials, with sizes ranging from NPS 1/8 to NPS 26. The pipe specifications are ASTM A53 Pipe Specification 10, ASTM A53 Pipe Specification 20, ASTM A53 Pipe Specification 30, ASTM A53 Pipe Specification 40, ASTM A53 Pipe Specification 60 and ASTM A53 Pipe Specification 80. This standard is one of the most widely used carbon steel pipe material standards in oil and gas, structures, construction, low-pressure pipelines, conveyor rollers and other processing fields.
ASTM A53 steel pipe types
F type – furnace butt welding, continuous welding grade A
- Tensile strength 390 MPa
- Yield strength 220 MPa
- Ductility 174%
- Poor toughness, simple process, low cost
E type – resistance welding, grade A and grade B
- Tensile strength 400 MPa
- Yield strength 230 MPa
- Ductility 18%
- Medium toughness, high cost performance
S type – seamless, grade A and grade B
- Tensile strength 415 MPa
- Yield strength 240 MPa
- Ductility 20%
- Good toughness, high mechanical properties
| Physical Requirements – A53 | Seamless & ERW | Grade A | Grade B |
| Tensile Strength (min. psi) | 48000 | 60000 | |
| Yield Strength (min. psi) | 30000 | 35000 |
| Physical Requirements – A53 | Element | Grade A | Grade B |
| Carbom（max %) | 0.250 | 0.300 | |
| Manganese（%) | 0.950 | 1.200 | |
| Phosophorus（max %) | 0.050 | 0.050 | |
| Sulfur（max %) | 0.045 | 0.045 |
Common welding methods for A53 pipes
- Semicarc welding (SMAW): simple operation, cheap equipment, suitable for all thicknesses of steel pipes.
- Gas shielded welding (GMAW/MIG): suitable for thin-walled pipes, fast welding speed, high weld quality.
- Tungsten inert gas shielded welding (GTAW/TIG): extremely high weld quality, suitable for thin-walled pipes, but the welding speed is slow.
- Submerged arc welding (SAW): mostly used for thick-walled pipes, high welding efficiency, suitable for large-scale production.
1.Which type of steel pipe should be used for aerospace, high temperature furnace pipes and other occasions with high mechanical performance requirements?
ASTM A53 S-type – seamless steel pipe
2.What is the wall thickness tolerance of ASTM A53?
Seamless steel pipe: The wall thickness tolerance is usually ±12.5% or ±0.01 inch (0.25 mm), whichever is greater.
Welded steel pipe: The wall thickness tolerance is generally slightly larger, usually ±10% or ±0.01 inch (0.25 mm).
