ISO 6554:1980

Действует

Flanged automatic steam traps; Face-to-face dimensions — 4 стр.

На этот документ ссылаются

BS EN 558:2008+A1:2011

Заменен

Industrial valves. Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems. PN and Class designated valves — 34 стр.

BS EN 558:2017

Действует

Industrial valves. Face-to-face and centre-to-face dimensions of metal valves for use in flanged pipe systems. PN and Class designated valves — 36 стр.