This part of ISO 21138, together with ISO 21138-1, specifies the definitions and requirements for pipes with a non-smooth external surface (Type B), fittings and systems based on unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) structured-wall piping systems in the field of non-pressure systems for underground drainage and sewerage.
This part of ISO 21138 specifically refers to PVC, PP and PE materials. This part of ISO 21138 covers a range of pipe and fitti