Lap joint flange is that used flanging or steel rings on the pipe end of flange , lap joint flange can be active on the tube end. Steel ring or flanging is the sealing surface, the purpose of the lap joint flange is to press them down. This shows that because of the steel ring or flanging are blocked, lap joint flange is not contact with the media. Generally used on the pipe, in that case, loose bolts can be rotated on both sides of the pipe, and then tighten. It can be more convenient to disassemble the pipe fittings. A lap joint is also called a loose flangeRequest a quote
Lap joint is one king of flange pipe fittings,it is suitable for connection of non-ferrous metal ( Steel, aluminum ) and stainless steel containers ,and Corrosion resistant pipeline. Lap joint is a movable flange piece,which is usually attached to the water supply and drainage fittings(the most common on the expansion joint),When the manufacturer leaves the factory, there is a flange at each end of the expansion joint, which is directly connected with the pipeline and equipment bolt in the project.
American standard: ANSI B16.5 ,Class150、300、600、900、1500（WN、SO、BL、TH、LJ、SW).
Japanese standard：JIS 5K、10K、16K、20K（PL、SO、BL、WN、TH、SW）.