ASTM A252 ERW Steel Pipe Piles
ASTM A252 ERW Steel Pipe Piles are structural-grade pipes manufactured per ASTM A252 standard. They are engineered for deep foundation applications, serving as permanent load-bearing members or as permanent shells for cast-in-place concrete piles in construction projects such as buildings, bridges, retaining walls...
Products Description
Product | ASTM A252 ERW Steel Pipe Piles |
Process | Electrical Resistance Weld |
Grade | GR1, GR2, GR3 |
Size Range | OD max to 660mm, Thickness max to 26.97mm |
Pipe Length | 5.8m, 6m,12m,as requirement |
Pipe Ends | Plain, Bevel |
Surface | bare, black paint, FBE, 3PE .. |
Specifications and Features
Standard Compliance: Manufactured to ASTM A252/SA252 specifications, which define the requirements for nominal wall steel pipe piles.
Tolerance per ASTM A252:
Outside Diameter: Shall not vary more than ±1% from the specified diameter.
Wall Thickness: At any point, shall not be more than 12.5% under the specified nominal wall thickness
Manufacturing Process: Produced using the Electric Resistance Welding (ERW) process, ensuring a consistent and high-strength longitudinal weld.
Primary Application: Designed for use as pipe piles where the steel cylinder functions either as a permanent load-carrying structural element or as a permanent formwork for concrete piles.
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Mechanical Properties And chemical compositon
The standard covers three grades with the following minimum tensile and yield strength requirements:
Grade | Minimum Tensile Strength | Minimum Yield Strength |
|---|---|---|
Gr. 1 | 50,000 psi (345 MPa) | 30,000 psi (205 MPa) |
Gr. 2 | 60,000 psi (415 MPa) | 35,000 psi (240 MPa) |
Gr. 3 | 66,000 psi (455 MPa) | 45,000 psi (310 MPa) |
Chemical Composition: The steel used contains a maximum of 0.050% phosphorus
manufacturing process
---Coil receipt and inspection---Coil slitting--Recoiling after slitting---Coil Uncoiling and joining
---Coil Leveling--Forming---High frequency welding---Trimming flash---Heat treatment---Air Cooling
---Sizing--- Cutting to length---Inspection and testing sampling --- Hydrostatic testing(when client requires)
---Final Auto UT on welding seam---Manual UT at pipe ends
---Laboratory test - Chemical analysis--- Mechanical Test-- Final dimension inspection
