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Requirements for welding of threading pipe


Release time:

Dec 31,2020

In the process of using threading pipe, sometimes the pipe will be welded according to the need, and in terms of welding, what are the requirements?

In the process of using threading pipe, sometimes the pipe will be welded according to the need, and in terms of welding, what are the requirements?

First, check whether the parts can be used normally, such as checking whether the parts of the welding machine work normally, especially before use, measure whether the temperature of the welding machine plus plate is within the standard temperature range. Then, for the adjustment of the temperature of the heating plate, the influence of the surface temperature and the ambient temperature on the actual temperature of the heating plate should be considered. Check the wrong mouth rate before threading pipe butt joint, the wrong mouth rate is not more than 10% of the pipe wall thickness, if the wrong mouth rate exceeds 10% of the pipe wall thickness, will make the welding contact surface is less than the pipe wall thickness, affecting the welding effect.

After the threading pipe welding is completed, the pressure is allowed to enter the cooling time. If forced cooling methods such as water cooling and air cooling are used after welding, virtual welding will occur at the welding place and affect the welding quality. Therefore, natural cooling should be adopted for cooling.
 

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