CEN/TC 236/WG 1 - Amendment 1 to 331
To complete and to improve some technical prescriptions for instance in relation to: - definitions: specifications of the meaning of nominal diameter and nominal pressure; - construction requirements: mechanical joints, threated joints, etc...; - performance requirements: leak-tightness and pressure values; - test methods: resistance to low temperature, leak-tightness, in relation to MOP, suitability of the devices shown in figure A.1 for the scope of the test, etc...; marking: completion including the reference to EN 331, the word "gas" and others. To verify the consequences deriving from CPD (M/131) and PED and, if appropriate, to align the content of EN 331 to the necessity of the two Directives.
Amendment 1 to 331
To complete and to improve some technical prescriptions for instance in relation to: - definitions: specifications of the meaning of nominal diameter and nominal pressure; - construction requirements: mechanical joints, threated joints, etc...; - performance requirements: leak-tightness and pressure values; - test methods: resistance to low temperature, leak-tightness, in relation to MOP, suitability of the devices shown in figure A.1 for the scope of the test, etc...; marking: completion including the reference to EN 331, the word "gas" and others. To verify the consequences deriving from CPD (M/131) and PED and, if appropriate, to align the content of EN 331 to the necessity of the two Directives.
General Information
1.1 This European Standard specifies the characteristics for the construction, performance and safety of ball valves and closed bottom taper plug valves. It also details the test methods and marking provisions.
It applies to metallic valves not directly buried for domestic and commercial installations inside or outside of buildings, using gases of the first, second and third family (specified in EN 437) and working up to 0,2 × 105 Pa, 0,5 × 105 Pa, 1 × 105Pa, 5 × 105 Pa and 20 × 105Pa and with temperature limits from -5 °C or −20 °C to + 60 °C.
NOTE "Not directly buried" within the context of this standard means that valves below ground are not in direct contact with earth or other materials e.g. that they are in a protected encasement.
1.2 Valve nominal sizes (DN) covered by this European Standard are as follows: 6, 8, 10, 12, 15, 20, 25, 32, 40, 50, 65, 80, 100.
- Standard45 pagesEnglish languagesale 10% offe-Library read for1 day
Replace the second paragraph of clause 1.1 with the following:
"It applies to metallic valves for domestic and commercial not directly buried installations inside or outside of buildings, using gases of the first, second and third family (specified in EN 437) and working up to 0,2 ´ 105 Pa, 0,5 ´ 105 Pa and 5 ´ 105 Pa."
- Amendment21 pagesEnglish languagesale 10% offe-Library read for1 day
- Amendment30 pagesEnglish languagesale 10% offe-Library read for1 day