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API 6A TYPE 6B FLANGE

ASME B16.9-2012 Forged steel butt welding pipe fittings

ASME B16.47 & AWWA

ASME B16.47-2006

ASME-B36.10M-2000

ASMEB36.10M-2015

ASTM_A860

BS EN 10253-4-2008

Comparison table of commonly used Chinese and foreign steel compositions

Comparison table of commonly used material grades at home and abroad

DIN-EN-10222-1

DIN-EN-10253-2

DIN-EN-10253-4 stainless steel pipe fittings

EN 10253-4

EN10028-2-2003

GBT 12459-2017 Steel butt-weld pipe fittings types and parameters

GBT 14383-2008 Forged socket weld and threaded fittings

gost-8734-75

gost-17375-2001

gost-17376-2001

GOST-17380-2001

JIS B2311-2001

MSS SP-44-2010 Steel Pipeline Flanges

SA350-2004 chinese-LF2

ГОСТ 17375-2001

ГОСТ 17378-2001

ГОСТ_17375-2001R=1.5DN_ELBOW