This specification covers the requirements and methods of test for corrugated polyethylene (PE) pipe@ couplings and fittings for use in subsurface drainage systems@ storm sewers@ and in surface drainage (culverts)@ where soil support is given to the pipe??s flexible walls in all applications.Nominal sizes of 75 to 250 mm are included.Materials@ dimensions@ pipe stiffness@ environmental stress-crack resistance@ perforations@ joining systems and forms of marking are specified.Note 1??When polyethylene pipe is to be used in locations where the ends may be exposed@ consideration should be given to combustibility of the polyethylene and the deteriorating effects of prolonged exposure to ultraviolet radiation.The following precautionary caveat pertains only to the test method portion@ Section 9.4 of this specification. This standard does not purport to address all of the safety concerns@ if any@ associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.