ASTM A252 covers the manufacturing standards for seamless or welded pile pipe. This specification covers cylindrical nominal wall steel pipes used as permanent piles or casings for concrete piling.
These pipes are classified into Class 1, Class 2 and Class 3, the last of which is primarily used for piling to help provide foundation stability and support for buildings and other construction projects.
For most standard construction jobs, Class 1, Class 2, Class 3 ASTM A252 piping should work fine. Of these ASTM Grade-3, pipe piles are the preferred variety because they have a tensile strength of 60,000 psi and a yield strength of 45,000 psi. This specification covers only cylindrical steel pipes and excludes all rectangular steel pipes.
Tensile Measurements for ASTM A252 Grade 3 Pipes
| Grade | Yield Point | Min. Elongation at 2° | Tensile Strength | Min. Elongation at 8° |
| 3 | 45000 psi | 20% | 66000 psi | … |
Calculated Minimum Elongation Values of ASTM A252 Grade 3 Pipes
| Nominal Wall Thickness in Inches | Minimum Elongation % in 2 Inches for ASTM A252 Grade 3 |
| 5/16 or 0.312 inch | 20.00 |
| 9/32 or 0.281 inch | 19.00 |
| ¼ or 0.250 inch | 18.00 |
| 7/32 or 0.219 inch | 17.00 |
| 3/16 or 0.188 inch | 16.00 |
| 11/64 or 0.172 inch | 16.00 |
| 5/32 or 0.156 inch | 15.00 |
| 9/64 or 0.141 inch | 14.00 |
| 1/8 or 0.125 inch | 14.00 |
| 7/64 or 0.109 inch | 13.50 |
