Airport project: metal expansion joint for fire protection system of T3 terminal building of Beijing Metropolitan Airport
Shanghai Dongfeng Pump and Valve Factory assists in the infrastructure airport project, supporting the metal expansion joint product for the fire protection system of the T3 terminal building of Beijing Metropolitan Airport. This product mainly plays the role of vibration reduction and is widely used by many fire protection systems.
Introduction to metal expansion joint of fire protection system of airport T3 terminal:
The metal expansion joint compensator is composed of design, manufacturing, installation, operation management and other links. Therefore, reliability should also be considered from several aspects. In addition to its working efficiency, it should also consider its medium, working temperature and external environment. We must also consider the possibility of stress corrosion, water treatment agents, and pipeline cleaning to affect the materials, and on this basis, weld with the metal expansion joint materials, Forming, material cost and performance, pointed out the economic and practical production of materials to optimize metal expansion joints.
Under normal circumstances, the metal expansion joint materials shall meet the following conditions: high elasticity, limit, tensile strength and fatigue strength, to ensure that the metal expansion joint works, good plasticity, to facilitate the forming and processing of the metal expansion joint, and through the subsequent processing (processing hardening, heat treatment, etc.), to obtain sufficient hardness and strength.
Good corrosion resistance to meet the requirements of metal expansion joints working in different environments. Good welding performance to meet the requirements of welding process. For the trench laying of heat pipe network, when the low-lying pipeline, rain or accidental sewage will be soaked in the metal expansion joint compensator, the more corrosion resistant materials such as iron should be considered, and nickel alloy should be selected, High nickel alloy, etc.
Due to the manufacturing of metal expansion joints with the rising price of this material, we can consider that an additional corrosion layer of the surface wear-resistant alloy is only used in the corrosive medium, the type of fatigue life of the metal expansion joint and the cause of failure Analysis of the design compensation shows that the stability, stability and corrosion cycle of the metal expansion joint are two pairs of displacement and fatigue life, Too low will lead to lower stability and corrosion resistant metal expansion joint fatigue life.