Categories Marine Marine flange welded flange tube is inserted into the inner flange welded flange, welded flange into the neck with a plate welded flange and welding flange take two kinds. Advantages welded flange is to create a simple, low production costs, but not high temperature high pressure, mainly for pressures below 2.5 MPa at room temperature piping, flanges ship most used. Marine also known as high-neck flange welded flange, meaning there with neck tube and pipe welding transition and flange connection. Greater rigidity welded flange distortion, sealed, widely used for high pressure and temperature of the occasion, nominal pressure PN about 16MPa. Mainly used for compressed air piping, piping carbon dioxide. Marine loose flange, also known as loose flanges, high material costs are generally the pipeline, to reduce costs and the use of fittings and flanges inscribed combination of different materials and pipes of the same material, is the use of flange, steel ring such as the flange bearing on the pipe end, a pipe flanges on the activities of the tube end. Loose flanges are generally used for the copper-nickel alloy pipe and expansion joints. Marine hydraulic flange marine hydraulic piping pressure is very high, so are using a special high-pressure method socket blue, depending on the diameter of the flange thickness at 30mm-45mm or so, which generally use a recessed flange flange with a convex flange connection, with O-ring as a sealing material.