Product design and scope
Design standard: GOST 5762
Length of structure: GOST 3706
Flange connecting end: GOST 33259
Butt welding connecting end: GOST 33259
Wall thickness: GOST 5762-02
Inspection and test: GOST 33257-15
Pressure and temperature rating: GOST 356
Product scope: DN50~DN1000, PN16~PN250
Main body material: 20L、25L、20GL、20GML、20Cr5Mo、15CrMo、20CrMo、12Cr18Ni9Ti、12Cr18Ni10Ti、12Cr18Ni12Mo3Ti etc.

GOST check valve, swing check valve, high pressure check valve