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.