Metal bellows and finned bellows in the internal combustion engine cooler application, in the gas and diesel engine cooler shell or cooling core between the two plates installed 1-1000 with intermittent convex concave metal bellows, using the expansion method, welding method and other methods to fix it in one end of the plate, so that the flow state of the cooling medium is changed to improve the heat transfer coefficient, to improve the heat transfer efficiency. Increase the heat transfer efficiency. The invention is a novel idea, practical technology, low cost, reliable performance, high heat transfer efficiency, no scaling, long life, and low thermal stress.
1、Pressure according to the actual working pressure of the hose, and then check the nominal diameter of the corrugation and the pressure gauge, decide whether to use the stainless steel mesh sleeve type.
2, size hose nominal diameter, the choice of joint type (mainly flange connection, threaded connection, quick coupling connection) and the size, hose length.
3, the state of the hose according to the state of use, with reference to the correct use of metal hose and installation methods and the best length of the hose in the settlement compensation. Hose length calculation of various movement states and the minimum number of bends and minimum bending radius of the hose and other factors, the parameters of the correct selection of hose length, and the correct installation.
4, temperature hose medium in the working temperature and range; hose work when the ambient temperature. High temperature, shall be according to the metal bellows high temperature working pressure temperature correction factor, determine the temperature correction pressure to determine the selection of the correct pressure level.
5、The chemical properties of the medium conveyed in the medium hose, according to the hose material corrosion resistance performance parameter table, to determine the material of each part of the hose.
6、The vacuum hose is mainly used in the production of single crystal silicon to make it reach negative vacuum
Mainly used in steel belt class
Steel belt corrugated pipe also called steel belt reinforced polyethylene spiral corrugated pipe is a kind of high-density polyethylene (PE) as the matrix (inner and outer layer) and the surface coating bonding resin steel belt composite winding structure wall pipe. The wall structure is composed of three layers: the inner layer is a continuous solid wall PE inner pipe, the inner layer is wound with a ring-shaped corrugated steel reinforcement (formed into a "V" shape by steel plate), and the outer layer of polyethylene is compounded outside the corrugated steel reinforcement to form the overall corrugated spiral pipe. The typical structure is shown in the figure. The modulus of elasticity of steel is nearly 200 times that of polyethylene (the modulus of elasticity of carbon steel  is around 190,000 MPa), and combining the advantages of metal and plastic is obviously the ideal way to achieve high stiffness and low consumption, which can combine the high stiffness and high strength of steel and the excellent characteristics of plastic such as corrosion resistance, wear resistance and flexibility, etc., to bring into play the advantages of both sides and make up for the shortcomings of both sides to achieve The unity of high performance and low cost.