scope:

This document specifies the mating dimensions for thermoplastic flange adapters and corresponding loose backing flanges intended to be used in thermoplastic piping systems for the conveyance of fluids under pressure. It applies to flange adapters and loose backing flanges for use with pipes with nominal outside diameters (dn) from 16 mm to 2000 mm and nominal pressures up to 25 bar1) (PN 25). This standard specifies the dimensions of the flange adapters intended to be used for: - Butt fusion piping systems. - Socket fusion piping systems. - Adhesive jointed piping systems. NOTE 1 - For specific connections with dimensions (eg dn450 or dn 630) not covered in this document, specific solutions are available on the market. This document covers loose backing flanges made from metal, thermoplastics, or a combination of metal and thermoplastics. This document also provides information on gaskets, and gives general recommendation on good assembling practices. NOTE 2 - Industrial application are not covered by this document. Products intended for industrial application are covered by ISO 15493[1], ISO 15494[2] or ISO 10931[3].