Quality supply: Plate welded flange, PL plate welded flange production: (Contact: Ma Yuanyuan phone: 187,327,0358 QQ: 619 688 609) company mainly engaged in various materials pipe: 304,304 L, 316,316 L, 321 310S ,18-8, 16Mn, petroleum, chemical, metallurgy, electric power, shipbuilding, machinery and other industries, piping, valves, pressure vessels, condensers, heat exchangers, towers, manholes, hand holes, etc. at the flange connection seal Finish: rust-proof black paint, anti-rust varnish, transparent anti-rust oil, hot-dip galvanizing, cold galvanizing, 3PE coating, epoxy coating. Product quality: has passed ISO9001 international certification, pressure vessel manufacturing license. Advantages: with neck flat welding flanges are welded flange, because there is a short-necked, thereby increasing the strength of the flange improved flange bearing efforts. It can be used in higher pressure pipelines. Disadvantages: higher cost, compared with the plate welded flange in transit due to the characteristics of its shape more easily bump