Welding groove form and welding process of container adapter tube or blind flange adapter tube

Abstract

The invention discloses a welding groove form and welding method of a container adapter tube or a blind flange adapter tube. According to the welding groove form, different groove forms are set according to the wall thickness, in this way, backing welding can be conveniently conducted through manual tungsten electrode argon arc welding, thus one-side welding both-side formation is completed, and the quality of a weld seam is more stable; and in the welding process, backing is conducted firstly through manual tungsten electrode argon arc welding, one-side welding both-side formation is achieved, the backing weld seam does not need to be polished, then whole welding is completed through manual arc welding, the weld seam is beautiful in formation, weld lines are uniform, the weld seam is stable in quality, and the deformation of a container or a blind flange is small.

Description

technical field [0001] The invention relates to a welding groove form, and also relates to a welding process for a container joint or a blind flange joint. Background technique [0002] For pressure vessels, the quality requirements for the pressure-bearing welds are relatively high. Although the single-side welding and double-side forming technology of manual arc welding can guarantee the welding quality, it requires high skills for welders. Most welders cannot guarantee the back forming and welding quality. Manual argon tungsten arc welding has become the preferred welding process method for bottom layer welding of containers due to the back forming and stable welding quality. The groove form of the traditional container and blind flange is a 45° single V or 45°K groove, and the requirements for the blunt edge and the gap size of the groove are not high, and the 45° single V or 45°K groove is usually narrow However, if the weld bead is deep, the weld bead cannot be ground...

AI Technical Summary

Problems solved by technology

[0002] For pressure vessels, the quality requirements for the pressure-bearing welds are relatively high. Although the single-side welding and double-side forming technology of manual arc welding can guarantee the welding quality, it requires high skills for welders. Most welders cannot guarantee the back forming and welding quality. Manual tungsten argon arc welding has become the preferred welding method for bottom layer welding of containers due to the back forming and stable welding quality

The groove form of the traditional container and blind flange is a 45° single V or 45°K groove, and the requirements for the blunt edge and the gap size of the groove are not high, and the 45° single V or 45°K groove is usually narrow However, if the weld bead is deep, the weld bead cannot be ground and repaired by an angle grinder, which often causes defects such as incomplete penetration, incomplete fusion or slag inclusion of the root bead. Generally speaking, the welder's skills are high and the welding quality is unstable.

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