Standards:ASME B16.9-2007
ASME B16.25-2007
ASME B16.5-2007
EN10253-1-1999 EN10253-2-2007 EN10253-3-2008 EN10253-4-2008
DIN2605-1-1992 DIN2605-2-1995
JIS B2311-2009 JIS B2312-2009 JIS B2313-2009
GB/T12...Hebei Haihao High Pressure Flange &Pipe Fittings Group Gee Pipe Mill Co.,Ltd
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