This International Standard specifies the principal dimen-sions of loose backing flanges for butt or socket fusion-welded flange adaptors1) and damping flange with insert ring for polyethylene (PE), metric series, pressure pipes and fittings.
DS/ISO 3663:1988 history
1988DS/ISO 3663:1988 Polyethylene (PE) pressure pipes and fittings, metric series. Dimensions of flanges