... ,DIN2633,DIN2634,DIN2635,DIN2636,DIN2637 DIN2638,DIN2673JIS:B2220 EN: 1092-1:2001 GOST:GOST12820-80,GOST12836-67,GOST12821-80,GOST12821-80 TypeWelding ... Ring Joint Flanges, Long Welding Neck Flanges, Figure 8 BlanksSize 1/2"--78" (DN15MM-DN2000MM)ClassANSI 150LBS-2500LBS,DIN PN6-PN160BS ... TC/TR) ,SO ,WN,PL,BL,SW,TH flanges,pipe end cap,eccentric/concentric reducers ;seamless steel pipe (SMLS) ,and LSAW ...