Ship standard flange - flange connection or flange joints, is defined by the flanges, gaskets and bolts of the three interconnected as a set combination detachable connection seal structure, pipe flange means piping plumbing fixtures in France Portland, import and export of equipment used in the flange means on the device. There are holes on the flange, so that the two flange bolts tightly connected. Between the flange sealing gasket. Threaded flange connection points (threaded connection) flange and welding flange and flange clip. GB flange of another layer of meaning is: according to the national standard dimensions, tolerances and other production of flange, different from the production of non-standard size piece flange, also known as two standard flange (someone called non-standard flange is incorrect), usually some unscrupulous businesses will reduce the flange thickness, diameter size to achieve the purpose of saving the two materials, as well as with scrap steel or scrap steel processing flange, usually this steel chemical composition and mechanical performance is not up to the waste.