The main technologies are flaring pipe connection technology, card sleeve pipe connection technology and so on. WALFORM pipe end molding technology as a new way of pipeline connection, known as the current best leakage prevention scheme. WALFORM technology consists of only three parts: 24° conical joint, nut and seal ring. The molded pipe ends are connected with a conventional DIN standard joint and DIN standard nut, and the sealing ring is installed in the * possible leakage path. The joint