Pipeline cellulose vertical down welding method

A welding method and cellulose technology, applied in welding equipment, welding accessories, tubular objects, etc., can solve the problems of high construction cost, difficult repair, inconsistent welding seam width, etc., reduce the investment of manpower and material resources, and require high professional quality. , the effect of improving the construction speed

Inactive Publication Date: 2020-09-01
SHAANXI HUASHAN ROAD & BRIDGE ENG
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Problems solved by technology

After the existing ordinary welding rod welding construction is completed, the flaw detection test detects that the pipeline has welding quality problems such as slag inclusions, pores, and weld width inconsistencies. It is difficult to repair, and it is difficult to achieve the desired effect. Welding requirements; moreover, in the

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  • Pipeline cellulose vertical down welding method

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Embodiment Construction

[0029] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but only to illustrate the technical solutions of the present invention.

[0030] Such as figure 1 As shown, a kind of pipe cellulose vertical down welding welding method provided by the invention comprises the following steps:

[0031] S1, prepare before welding,

[0032] Grind the groove of the pipe and some areas of the base metal on both sides to remove scale, oil, slag and surface layers that affect the quality of the joint. Usually, the cleaning range is controlled on the groove and the base metal on both sides 20mm area, while smoothing the uneven areas; check whether the performance of the welding machine is good, and dry...

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Abstract

The invention discloses a pipeline cellulose vertical down welding method. The method includes the following steps: S1, making preparation before welding; S2, performing pipeline weld bond fitting-upand positioning; S3, sequentially performing backing welding, hot welding, filling welding and cosmetic welding on grooves by using a DC arc welding machine in cooperation with a cellulose electrode;S4, performing weld seam quality inspection, evaluating the result according to an inspection standard, if the result meets the inspection standard, performing post-welding heat treatment, otherwise,performing repairing or reworking; and S5, performing a hardness test on the weld seam after heat treatment, if the result meets a hardness requirement, performing a bulge test, otherwise, performingreworking to continue heat treatment.

Description

technical field [0001] The invention relates to a pipeline welding method, in particular to a pipeline cellulose vertical downward welding welding method, which is suitable for urban central heating pipeline welding construction. Background technique [0002] Urban central heating system is an important infrastructure for urban economic and social development, and its development level is a symbol of urban modernization. With the development of urban central heating, the welding technology in pipeline construction (including welding equipment, welding process, welding quality, etc.) ) puts forward higher requirements, especially for urban heating pipelines with long lines, large pipe diameters and high pressures, higher requirements for pipeline welding processes, and stricter quality control. [0003] Pipeline welding is a systematic project consisting of many links. At present, many cities are promoting central heating, so large-scale heating pipe network construction is f...

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Application Information

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IPC IPC(8): B23K9/00B23K9/235B23K9/32B23K101/06
CPCB23K9/0026B23K9/235B23K9/32B23K2101/06
Inventor 王陕郡姬文渊尚广旗严坤茹国梁雷鹏珍
Owner SHAANXI HUASHAN ROAD & BRIDGE ENG
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