ISO 4439:1979, Unplasticized polyvinyl chloride (PVC) pipes and fittings -- Determination and specification of density

The density of an unplasticised polyvinylchloride (PVC-U) pipe or -fitting, measured by the method described in ISO 1183, shall be between the limits of 1,35 gram per cubic centrimetre and 1,46 gram per cubic centrimetre. This does not apply to pipes made of compounds containing fillers or cellular products. This title may contain less than 24 pages of technical content.