The method of selective welding of seamless steel pipe should be based on the material and wall thickness of the seamless steel pipe. Since different welding methods have different arc heat and arc force, different welding methods have different characteristics.
For example, tungsten arc welding is characterized by low current density, stable arc combustion and good weld formation. It is especially suitable for thin plate welding, but thick plate welding is not an option. The plasma arc is characterized by high arc temperature and high energy density. , The plasma arc has good straightness, wide adjustment range of stiffness and flexibility, stable work, but complicated operation. Submerged arc welding has the characteristics of strong penetration ability and high welding efficiency, so it can greatly improve the welding speed and reduce the welding cost, but the labor conditions and environment are relatively poor.
It can be seen that different welding methods have different functions and different running costs. According to the material and wall thickness of the seamless pipe, the reasonable selection of the welding method is a very important task to ensure the welding quality, improve the productivity and reduce the cost.
In addition, the same welding method, type and magnitude of welding current, arc voltage, welding speed, welding material used, etc., have a greater impact on arc heat and arc force. Therefore, different welding methods can only be applied to welding of different materials and different thicknesses.
Post time: Dec-14-2022