There is no specific ASTM standard or other standard specification on fabricated fitting dimensions. However, pipe used to fabricate HDPE fabricated fittings comply with the dimensions and tolerances as specified in ASTM F714. HDPE Fabricated Fittings are fabricated of pipe and plate materials consisting of virgin resin in accordance with the material specifications listed in ASTM D1248. HDPE PE3408 fabricated fittings utilize materials extruded or molded from a Type III, Class C, Category 5, Grade P-3-4 resin with a cell class of 345434C as stated in ASTM D3350 and are compatible for heat fusion with any pipe manufactured from a like or similar resin.