Heat treatment after welding heat treatment after welding, otherwise, any kind of heat treatment after welding. Heat treatment after welding code and application requirements, it also need through a service environment. The purpose of heat treatment after welding is to increase light resistance and pressure.
　　1. Metal hose, this is a very important steel not cooled to room temperature. On the contrary, it should be between the heating temperature, PH value of temperature. After the general heating temperature is 450 degrees or so. This is a very important metal hose structure does not fall at room temperature, because it can cause cracking of potential problems.
　　2. Most applications don't need to be heated. In general, when heated to reduce because of the sensitive metal base and micro potential hydrogen cracking problems.
　　3. As a result of the manufacturing process, is to reduce the heat and stress of the structure of metal hose radiation stress. In many cases, the residual stresses due to the metal hose. Therefore, it is very important to the proper pressure relieve technology, to minimize the potential problem.
　　4. When you don't know whether I need the serotonin, you must consider the basic metal alloy system or before heat treatment.