ASTM A252 is the standard specification for welded and seamless steel pipe piles. It covers cylindrical steel pipes with nominal wall thickness, specifically for piling purposes. Rectangular or square pipes are excluded
.
These pipes serve as permanent load-bearing members, or as shells for cast-in-place concrete piles, providing foundation support for construction projects.
Units: Inch-pound (can be converted to SI units).
Provides reference mechanical and chemical data for engineers and designers for structural design.
Chemical Composition
Phosphorus (P) max: 0.050% (higher P reduces weldability and makes steel brittle).
Other elements follow general carbon steel composition, as the standard focuses mainly on mechanical properties.
Mechanical Properties of ASTM A252 Pipes
| Grade | Yield Strength | Tensile Strength | Elongation |
|---|---|---|---|
| 1 | 205 MPa (30,000 psi) | 345 MPa (50,000 psi) | Wall-dependent |
| 2 | 240 MPa (35,000 psi) | 415 MPa (60,000 psi) | Wall-dependent |
| 3 | 310 MPa (45,000 psi) | 455 MPa (66,000 psi) | Wall-dependent |
Grade 3 is the most widely used, ideal for heavy-duty piling applications.
Elongation decreases with decreasing wall thickness, ensuring adequate ductility under load.
Reference Standards
ASTM A370: Mechanical test methods for steel products.
ASTM A751: Chemical analysis methods.
ASTM A941: Steel terminology.
ASTM E29: Significant digits in test results for specification compliance.
Manufacturing Types
Seamless Pipe Piles
Hot rolled or cold drawn, thermally expanded, seamless steel pipes.
Welded Pipe Piles
Types: ERW (electric resistance welded), flash welded, fusion welded, submerged arc welded (SSAW or LSAW).
Seams can be longitudinal or helical spiral.
Raw Material Production
Steel produced via open-hearth, basic oxygen, or electric furnace processes.
Pre-Purchase Information
Before ordering ASTM A252 pipe piles, the following info is required:
Quantity (feet, meters, or number of lengths)
Material grade (Grade 1, 2, 3)
Manufacturing type (seamless or welded; ERW, EFW, LSAW, SSAW)
Pipe dimensions (OD, wall thickness, ASME B36.10 schedule)
Length (SRL, DRL, or fixed length)
End type (plain or beveled)
Inspection and shipping marks
Defect Allowance
Surface imperfections >25% of wall thickness are defects.
Imperfections ≤22.5% can be repaired by welding.
Any defects must be removed before butt welding pipe piles.
Testing Requirements
Material Analysis
Heat Analysis: Phosphorus limit; results reported in MTC.
Product Analysis: Sample frequency depends on pipe diameter:
<14" OD: 2 samples per 200 pcs
14–36" OD: 2 samples per 100 pcs
36" OD: 2 per 3,000 ft
Tensile Test
Must comply with grade-specific yield and tensile strengths.
Yield strength measured at 0.2% offset if needed; total extension 0.5% gage length.
Weight & Dimension Tolerances
Weight: +15% / -5% of theoretical.
OD tolerance: ±1%
Wall thickness tolerance: ±12%
Length: SRL, DRL, fixed/customized
Note: Hydrostatic testing is not required, since A252 pipes are for piling, not liquid transport.
Products Applications
ASTM A252 pipe piles provide foundation stability for:
Buildings and high-rise structures
Retaining walls
Bridges, docks, and offshore platforms
Industrial and municipal infrastructure
Advantages:
High strength and yield for load-bearing applications
Weldable for custom lengths and repairs
Seam flexibility for different construction needs
Corrosion resistance achievable via coatings or galvanization
ASTM A252 pipe piles are a key foundation element in modern construction. Grade 3 is the most commonly used due to its high tensile (455 MPa) and yield strength (310 MPa). Proper selection of grade, diameter, wall thickness, and length ensures safe, stable, and durable foundations.
