T/ZZB 2391-2021 (English Version) PDF

Scope: This document specifies the terms and definitions, symbols, types and basic parameters, basic requirements, technical requirements, test methods, inspection rules, markings, packaging, transportation, storage and factory documents and attachments of welded insulated gas cylinders (hereinafter referred to as gas cylinders). and quality commitment. This document is suitable for use under normal ambient temperatures (-40 ℃ ~ 60 ℃). The storage medium is liquid oxygen, liquid nitrogen, liquid argon, carbon dioxide and nitrous oxide cryogenic liquids. The design temperature is not higher than -196 ℃. The nominal volume A refillable vertical or horizontal gas cylinder with a capacity of 10 L to 500 L and a nominal working pressure of 0.2 MPa to 3.5 MPa. It is also suitable for use under normal ambient temperature (-40 ℃ ~ 60 ℃), the storage medium is liquefied natural gas (LNG), the design temperature is not higher than -161.3 ℃, the nominal volume is 150 L ~ 500 L, and the nominal working pressure is not less than 0.2 MPa refillable vertical or horizontal gas cylinder. This document does not apply to vehicle gas cylinders, nor to gas cylinders whose storage medium is liquid helium or liquid hydrogen.

T/ZZB 2391-2021 history