Stainless steel joints in the marine industry In the hydraulic industry, stainless steel joints are widely used in ships, and the types of stainless steel pipe joints are also very many, in 4800 multi-purpose container ships belong to technology-intensive ships, high process requirements, strict quality control, in the ship system all equipment accessories stainless steel joints, stainless steel pipe joints (including pipes, valves, stainless steel joint couplings) are supplied by Noray precision matching The hydraulic system stainless steel joint coupling adopts the ferrule joint, the entire hydraulic system shares hundreds of ferrule joints, specifications from 6 to 22 a total of five kinds of stainless steel joints and stainless steel pipe joints. The installation quality of the ferrule joint is the key to ensure the tightness of the system. To ensure the quality of the installation of the ferrule joint, first of all, let's analyze the structural characteristics and sealing principle of the ferrule joint in stainless steel fittings.
A, the sealing principle of the ferrule stainless steel joint

      The basic structure of the ferrule type stainless steel pipe joint consists of three basic parts: stainless steel joint body, ferrule and compression nut (Figure 1), of which the ferrule is the key part.

      The ferrule is a metal ring with an edge at the inner gland end, which has good rigidity, hardness and toughness. Stainless steel joint ferrule surface hardness is generally between 5 ~ 63, hard layer depth of 05 and II, the base hardness between 9891 ~ 96. Stainless steel joint ferrule in the assembly process, when tightening the compression nut, the ferrule in the axial force, was pushed into the stainless steel joint body 24 "tapered hole, stainless steel joint ferrule in the radial force under the radial contraction, so that the inner edge of the ferrule cut into the outer wall of the tube and form a ring-shaped groove, as shown in Figure 2, paragraph 0. The annular groove depth is about 3~0501111, forming a seal between the outer wall of the ferrule and the tube; at the same time, the outer wall of the ferrule and the stainless steel joint body of the 24-iron cone hole are completely and closely fit together, forming a seal between the ferrule and the cone hole of the stainless steel joint body. As shown in Figure 2, paragraph 6. ", 6 two sealing bands to complete the sealing of a tube. From the sealing principle of the ferrule stainless steel pipe joint can be seen, the quality of the manufacturing of the ferrule itself and the sealing belt ", 6 formed well or not is the key issue related to the pipeline stainless steel joints have no leakage.

And stainless steel pipe joints application