标准号:IS 12235 Pt.3-1986
发布日期:1988/8/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard ( Part 3 ) specifies a method for the determination of the opacity of plastics pipes and fittings.1.2 It lays down the maximum acceptable limit for light which may pass through the wall of the pipe or fitting, if the particular standard specifies that they be opaque.