ASTM A252 LSAW Steel Pipe Piles
ASTM A252 LSAW Steel Pipe Piles are high-strength, large-diameter tubular structural components designed specifically for deep foundation applications. They serve as permanent load-bearing members or as permanent shells for cast-in-place concrete piles, transferring structural loads through weak or compressible soil strata to more competent bearing layers.
Products Description
Product | ASTM A252 LSAW Steel Pipe Piles |
Standard | ASTM A252 |
Grade | GR1, GR2 ,GR3 |
Manufacturing method | Longitudinal Submerged Arc Welding, JCOE forming |
Range | OD 406~1524mm, Thickness 8~50mm |
Coating | Bare, black painting, FBE, Epoxy , 3LPE,3LPP... |
Ends | Bevel or Plain |
manufacturing process
Produced via the Longitudinal Submerged Arc Welding (LSAW) process, commonly using JCOE forming technology. This method involves edge milling, pre-bending, JCO forming, and automated internal and external welding under a protective flux layer, resulting in pipes with high wall thickness consistency and structural integrity.
Note: Hydrostatic testing is not specified by the ASTM A252 for pipe piles, it is carried out only when client requires
Technical Characteristics & Quality Assurance
Chemical Composition: The steels contain controlled levels of elements such as phosphorus (typically ≤0.050%) to ensure weldability and performance.
Minimum Mechanical Test requirements:
Grade 1: Tensile Strength: 50,000 psi (345 MPa); Yield Strength: 30,000 psi (205 MPa).
Grade 2: Tensile Strength: 60,000 psi (415 MPa); Yield Strength: 35,000 psi (240 MPa).
Grade 3: Tensile Strength: 66,000 psi (455 MPa); Yield Strength: 45,000 psi (310 MPa)
Permissible Variations:
Outside Diameter: Within ±1% from the specified diameter.
Wall Thickness: Not more than 12.5% under the specified nominal wall thickness
Non-Destructive Testing (NDT): commenly including ultrasonic testing, X-ray inspection to ensure weld integrity and material soundness.
Corrosion Protection: Depending on soil environment, pipes can be coated with FBE (Fusion Bonded Epoxy) or 3LPE (3-Layer Polyethylene) systems for enhanced durability
Primary Applications
ASTM A252 LSAW Steel Pipe Piles are engineered for foundational support in major construction projects:
Building Foundations: Providing stable support for super-large structures where surface soil is loosely packed or insufficient.
Infrastructure Projects: Used in bridges, offshore platforms, and heavy industrial facilities.
Cast-in-Place Concrete Piles: Acting as a permanent cylindrical shell that is subsequently filled with reinforced concrete
shipment
