Model Number: ASTM A220 Key Specifications/Special Features: ASTM A220 grade 1, grade 2, grade3Materials and manufacture:Piles shall be made by the seamless, electric-resistance welded, flash welded or fusion welded process, the seams of welded pipe piles shall be longitudinal, helical-butt or helical-lapProcess:Steel shall be made by one or more of the following processes: open-hearth, basic-oxygen or electric-furnaceChemical composition:Steel shall contain no more than 0.050% phosphorousWorkmanship, finish and appearance:
*Finish pipe piles shall be reasonably straight and shall not contain imperfections in such number or of such
character as to render the pipe unsuitable for pipe piles
*Surface imperfections having a depth not in excess of 25% of the specified nominal wall thickness shall be accepted, it shall be permissible to establish the depth of such imperfections by grinding or filing