Defines the general requirements for the construction, performance and safety of ball valves and closed bottom taper plug valves. In addition, it details the test procedures and marking requirements. It is applicable to valves for domestic and commercial not directly buried installations inside or outside of buildings, using gases of the first, second and third family.

SN EN 331:2016

BS EN 331:2015 - Identical

ONORM EN 331:2016 - Identical

UNI EN 331:2016 - Identical

NS EN 331:2015 - Identical

EN 331:2015 - Identical

SS EN 331 Ed. 2 (2016) - Identical

NBN EN 331:2016 - Identical

NF EN 331:2016 - Identical

NEN EN 331:2015 - Identical

SS EN 331 Ed. 1 (1998) - Identical

NF EN 331:1998 - Identical

NBN EN 331:1998 - Identical

I.S. EN 331:1998 - Identical

NS EN 331 Ed. 1 (1998) - Identical

UNI EN 331:1999 - Identical

UNE EN 331:1998 - Identical

SS EN 331:1998 - Identical

ONORM EN 331:2011 - Identical

DIN EN 331 (2011-08) - Identical

NS EN 331:1998 - Identical

UNI EN 331:2011 - Identical

NEN EN 331:1998 - Identical

BS EN 331:1998+A1:2010 - Identical

DIN EN 331 (1999-04) - Identical

ONORM EN 331:1998 - Identical