Study on FCAW-G repair procedure for original SAW weld under EMUA 158 standard

JIANG Dingcun; CHEN Zhe; MIN Xiangjun; SUN Qiang; LIU Yajie

doi:10.7512/j.issn.1001-2303.2021.07.16

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Study on FCAW-G repair procedure for original SAW weld under EMUA 158 standard
Vol. 51, Issue 7, Pages: 86-88(2021)
Published：2021
DOI： 10.7512/j.issn.1001-2303.2021.07.16
稿件说明：

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DOI：

JIANG Dingcun, CHEN Zhe, MIN Xiangjun, et al. Study on FCAW-G repair procedure for original SAW weld under EMUA 158 standard[J]. Eletric Welding Machine2021, 51(7): 86-88. DOI： 10.7512/j.issn.1001-2303.2021.07.16.

摘要

基于EEMUA 158标准要求

返修焊接工艺与原焊缝不同时需要进行返修焊接工艺评定。针对S355级别结构钢

原始焊缝采用埋弧自动焊工艺

焊接完成后进行外观和无损检测以及碳弧气刨和打磨处理

返修深度为母材壁厚的1/2

返修范围包含原始焊缝和母材

返修工艺使用药芯焊丝气体保护焊

返修完成后进行外观、无损检测

对返修焊缝进行横向拉伸、全焊缝拉伸、冲击试验、宏观腐蚀及硬度测试等相关理化试验

试验结果满足EEMUA 158标准要求

并取得DNV GL的认证。

Abstract

According to EEMUA 158 standard

the welding procedure qualification is required when the repair welding procedure is different from the original weld. In this paper

for S355 grade structural steel

the original weld is welded with automatic submerged arc welding procedure. After welding

the visual and non-destructive tests are carried out. Then carbon arc gouging and grinding are performed on the original weld.The repair depth is half of the wall thickness of the base metal.The repair area includes the original weld and base material.The flux cored arc welding procedure is used for the repair welding. After the repair

the visual and non-destructive tests are carried out. The related mechanical tests

such as transverse tensile test

full weld tensile test

impact test

macro-corrosion examination and hardness test are carried out on the repaired weld. The test results meet the requirements of EEMUA 158 standard and obtain the approval of DNV GL.