BS 4504 SLIP ON PLATE FLANGE RAISED FACE / FLAT FACE PN6, PN10, PN16, PN25, PN40, PN64 British Standard BS 4504 : Vaega 3.1 : 1989 – Li'o Flanges mo Paipa, Valves ma Fa'apipi'i Fa'atonu (PN Fa'atonu Fa'amau), Fa'amatalaga Fa'atatau mo Uamea.O lenei mea e aofia ai flanges i tulaga fa'aigoaina PN 2.5 i ...
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