1.1 This specification covers requirements and test methods for materials, dimensions, workmanship, ring stiffness, flattening, joint systems, and a form of marking for large diameter, 10 to 120 in. (250 to 3050 mm), inside diameter based polyethylene This specification covers requirements and test methods for materials, dimensions, workmanship, ring stiffness, flattening, joint systems, and a form of marking for polyethylene (PE) pipe of profile wall construction and with bell and spigot, heat fusi