welding neck WNRF WNFF 80sch forged q235 2010 Size: from 1/2 to 24 inch (DN1000-DN6000) Standard: JIS (KS), ANSI, AWWA, welding neck WNRF WNFF 80sch forged q235 2010 Size: from 1/2to 24(DN1000-DN6000) Materials: carbon steel or stainless steel Facing method: rust preventing oil, spray paint (black, yellow), hot galvanization, cold galvanization or colored electroplate, powder coating and so on. Varieties: threaded flange, slip-on flange (SO), socket welding flange, lap joint flange (LJF), welding neck flange (WNF), blind flange, orifice flange, reducing flange, pad type flange, loose hubbed flange, welding plate flange, welding neck collar, welding-on collar, loose plate flange, companion flange and so on Standards: KS B1502, JIS B2203, KS B1503, JIS B2220, JIS B2216, ANSI 16.5, ANSI B16.36, ANSI B36.1O-ANSI B36.19, ASME B16.47 SER, B(AP1605), ASME B16, 47SER, A(MSS), ASME B16, 47SER, B(API605), AWWA C207, DIN2527, DIN2631, 2632, 2633, 2634, 2635 Usage: connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to separate and check the situation of pipe line; easy to seal pipe line