What is ASTM A252 grade 3?
ASTM A252 GR3 steel pipe is a welded structural steel pipe that complies with the standards of the American Society for Testing and Materials (ASTM). It is specifically designed for deep foundation engineering and is manufactured through either longitudinal seam welding (EFW) or spiral welding (SAW) processes. The primary function of this pipe is to transfer the load from buildings or bridges to deeper, more stable soil layers. With a yield strength of ≥345 MPa, it is suitable for high-load scenarios such as the pile foundations of cross-sea bridges and the support structures for offshore wind turbine jackets.
ASTM A252 grade 3 pipe pile specification
Uses: for kinds of structural component,parts,fluid transmiting pipe and other construction.
Size:
Outer Diameter: 21.3mm-610mm (1/2″-24″)
Wall Thickness: 1mm-22mm
Length: 0.5mtr-20mtr
End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled,
Surface:Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,Fusion Bond Epoxy, 3-layers PE)
Chemical Composition:
| Element | Maximum (%) |
|---|---|
| Carbon (C) | 0.26 |
| Manganese (Mn) | 1.60 |
| Phosphorus (P) | 0.50 |
| Sulfur (S) | 0.045 |
Mechanical Properties:
| Strength | Grade 3 |
|---|---|
| Yield Strength | 45,000 psi min. |
| Tensile Strength | 66,000 psi min. |
Test Methods
Heat Analysis: Limits P, heat analysis report shall be stated in MTC to customer.
Product Analysis: Test frequency shall be adopted by the different pipe diameter, Specifically, under 14 inch 2 samples per 200 pieces, 14 to 36 inch 2 samples per 100 pieces, above 36 inch is 2 per 3000 ft.
Tensile requirements: According the A252 value. In case got a vague yield point, then test yield strength corresponding to a permanent offset of 0.2% of the gage length of the sample specimen, or to test a total extension of 0.5% of the gage length under load.
ASTM A252 GR3 steel pipe (yield strength ≥345 MPa) is primarily used in high-load applications such as:
Cross-sea bridge pile foundations: As permanent load-bearing structures, resisting seawater corrosion and soft silt layer loads.
Offshore wind turbine jackets: Supporting tower structures, requiring -45°C impact toughness and wave resistance.
LNG tank anti-floating piles: Used in projects like CGN East LNG terminal to prevent tank uplift and withstand ultra-low temperatures.
Test and inspection
Packaging and shipping
