Weld Neck Flanges
GOST 33259-2015 type 11 GOST 12821-80 Ct20 St20 Weld neck Flange
GOST 33259-2015 GOST 12821-80 Ct20 Weld neck Flange GOST 33259-2015. Flanges for valves, fittings and pipelines for pressure to PN 250. Design, dimensions and general technical requirements. Prepared on the basis of GOST R 54432-2011, instead of GOST 12815-80, GOST 12816-80, GOST 12817-80, GOST 12818-80, GOST 12819-80, GOST 12820-80, GOST 12821-80, GOST Read more…
