Specializing in the production of steel flanges, pipe fittings (wear, lined with plastic, corrosion) series backbone enterprises, valves, elbows, flanges domestic production, marine flange, carbon steel flange, JIS flange, German standard flange, welded flange, pipe components, products of the earlier manufacturers, the company has a quality inspection center .1, according to the chemical industry standard score: integral flange (IF), threaded flange (Th), plate Flat welding flange (PL), welding neck flange (WN), with a neck flat welding flange (SO), socket welding flange (SW), welded ring loose flange (PJ / SE), Flat welding ring loose flange (PJ / RJ), lining flange (BL (S)), flange cover (BL). 2, according to the petrochemical industry standard score: threaded flange (PT), welded flange (WN), flat welding flange (SO), socket welding flange (SW), loose flange (LJ), flange Cover (not table note). 3, according to the machinery industry standard score: integral flange, welded flange, plate flat welding flange, welding neck collar loose flange plate, flat plate welding ring loose flange, loose flange plate flange ring, flange cover. 4, according to the national standard of: integral flange, threaded flange, welded flange, with neck flat welding flange, with neck socket welding flange, welding neck collar Loose hubbed flange, welded flange plate , Loose plate flange butt, flat plate welding ring loose flange, plate flange ring loose flange, flange cover.