Flat welded steel flange: carbon steel pipe at a nominal pressure of not more than 2.5MPa connection. Welded flange sealing surface can be made into a smooth style, bump style and tenon slot three smooth-type flat Welding Electrodes  application amount used for medium conditions easing, such as low-voltage non-purified compressed air.
Low pressure water circulation, it has the advantage of relatively cheap; butt Tungsten Electrode: for the counterparts welding of the flange and the pipe, the reasonable structure, strength and stiffness, and can withstand high temperature and pressure and repeated bending and temperature fluctuations. reliable sealing. nominal pressure 0.25 ~ 2.5MPa welded flange bump-type sealing surface.