BS 4504 WELDING NECK FLANGE PN6, PN10, PN16, PN25, PN40 British Standard BS 4504: Abala 3.1: 1989 - Awọn Flanges Ipin fun Awọn paipu, Awọn Falifu ati Awọn Fittings (PN Designated), Specification for Steel Flanges.Eyi ni wiwa awọn flanges ni awọn sakani titẹ ipin PN 2.5 si PN 40 ati awọn iwọn ipin to D ...
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