... company engaged in the research, development and manufacture of pipe fittings. With 20 years' history, our company owns advanced ... elbows, tees, reducers, lap joint stub ends,flange and pipe caps, using materials of 321, 304, 304L, 316, ... 316Ti, 316L, 347, 310S, 317L, S31803, and 904L. The products which are widely used in many industrials such ... well, but we concentrate on the pipe fittings.