... ), hot galvanization, Electric galvanization or colored electroplate, powder coating and so on.Varieties: threaded flange, slip-on flange (SO), ... DIN2631, 2632, 2633, 2634, 2635Usage: connecting pipe line and keep its leakproofness; convenient for replacing pipe line; easy to ... company has passed ISO9001 certification.Markets: Europe, South and North America, Middle East, Asia, Africa and so on Flange