This Standard specifies the structural types, technical requirements, materials, test methods and inspection rules, markings, anti-corrosion, painting, packaging, storage and transportation of steel swing check valve with bolted bonnets (hereinafter referred to as "check valve").
This Standard is applicable to steel swing check valve with bolted bonnets connected by flange or welding. The parameters are: nominal pressure PN 16~ PN 420; nominal dimension DN 50~ DN 600; operating temperature -29 ℃ ~ 538 ℃; working medium petroleum, chemical industry, natural gas and relevant products.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards. For undated references, the latest edition of the normative document referred to applies.
