GB/T 34530.2-2017: Translated English of Chinese Standard. (GBT 34530.2-2017, GB/T34530.2-2017, GBT34530.2-2017): Valve for cryogenic insulated cylinder - Part 2: Shut-off valve
https://www.chinesestandard.net, 11 mag 2019 - 18 pagine
This part of GB/T 34530 specifies the basic types, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, product certificate, batch inspection quality certificate of shut-off valves for cryogenic insulated cylinders.
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Marking packaging transportation storage
Product certificate quality certificate of product batch inspection
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air inlet air outlet airtightness at ambient airtightness at low airtightness at low-temperature ambient temperature Block the air Close the valve closed volume Vd cryogenic insulated cylinder Exit-factory inspection external airtightness fill in nitrogen gas cylinders GB/T glass of 25x grade-0.4 pressure gauge helium hold pressure Immerse the valve inlet and outlet inspection items Inspection of connection Install the valve inverted measuring cup leakage rate liquefied natural gas mass change rate mechanical properties meet the requirements Megapascal milliliters modification serial number n-pentane Ningbo nitrogen or air nominal working pressure Open the valve operating torque outlet of valve requirements for airtightness requirements of 4.3.3 results shall comply results shall meet Shut-off valve spray chamber temperature of 85 test device Test of airtightness Test of external Test of resistance test of volume tested valve R-1 type test Valve for cryogenic valve in water valve material valve’s valves V-3 volume change rate water and hold