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Komité: ISO/TC 138/SC 7
(Valves and auxiliary equipment of plastics materials)
Opprinnelse: ISO
Sluttdato: 22. mar 2023
This document applies to all types of thermoplastics valves intended to be used for the transport of fluids.
NOTE 1 Examples of valve types tested with this method are in ISO 16135, ISO 16136, ISO 16138, ISO 16139, ISO 21787, ISO 4437-4, ISO 16486-4, EN 12201-4, EN 1555-4.
It does not specify the relationship between the torque and its possible increase after valve prolonged use at specific working condition or materials wear/chemical aggression.
NOTE 2 Concerning the chemical aggression of the materials, a collection of data is reported in ISO/TR 10358; concerning the endurance test necessary to confirm the ability of hand-operated plastics valves to withstand prolonged use with repeated opening and closure, further information is provided in ISO 8659.
Komité: ISO/TC 138/SC 7
(Valves and auxiliary equipment of plastics materials)
Opprinnelse: SN
Sluttdato: 22. mar 2023