1. When the HDPE water supply pipe is welded, the two pipe axes are centered, and the ends of the two pipes are first spot welded. HDPE water supply pipe and flange welding, the water supply pipe should be inserted into the flange first, after spot welding, use the square to find the right, after leveling and then welding. The flange shall be welded on both sides and the inner weld shall not protrude from the closed face of the flange.
2. When the wall thickness of HDPE water supply pipe is more than 5mm, the groove should be cut to ensure sufficient penetration. The groove forming can be processed by gas welding cutting or beveling, but the slag and iron oxide should be removed and polished with a trowel until the exposed metal light steel pipe is cut. The cutting section should be perpendicular to the center line of the pipe to ensure the welding of the pipe. Concentricity. The flange should be perpendicular to the center line of the pipe, and the surfaces should be parallel to each other. The flange gasket should not protrude into the pipe. The bolt specifications of the connecting flange should be matched with the flange. The length of the screw protruding nut should not exceed 1/2 of the screw diameter.
3. When welding the water supply pipe, the pipe interface should be cleaned of rust, dirt and grease. Flange gaskets should be selected according to the drawings and specifications. The cold water system uses rubber mats and the hot water system uses asbestos rubber mats.
Therefore, since the HDPE pipeline adopts hot-melt and electric-heat-melt connection, the interface and the pipe are integrated, and the hoop stress and the axial impact stress generated by the pressure can be effectively resisted, and the HDPE pipe does not add the heavy metal salt stabilizer. The material is non-toxic, non-fouling, and does not breed bacteria. The way the HDPE water supply pipe is connected is fixed.