中国特种设备安全
中國特種設備安全
중국특충설비안전
CHINA SPECIAL EQUIPMENT SAFETY
2015年
6期
47-53
,共7页
核电工程%主管道%窄间隙自动焊%RT疑似缺陷
覈電工程%主管道%窄間隙自動銲%RT疑似缺陷
핵전공정%주관도%착간극자동한%RT의사결함
Nuclear power project%Main pipeline%Narrow gap automatic welding%The RT suspected defects
文章以方家山核电工程2#机组1U4、1U6主管道焊口在焊接过程中出现的疑似层间未熔合缺陷为例,分析了核电工程主管道窄间隙自动焊的焊接特点,提出了如何避免出现焊接缺陷的措施;分析了核电主管道厚壁铸造奥氏体不锈钢的RT特点,采用焊缝中心透照及偏移焊缝中心两次透照的方法,可以有效避免漏检缺陷,同时,采取UT工艺是检验焊接质量和缺陷定位的良好实践,可以广泛应用于厚壁管的焊接检验。
文章以方傢山覈電工程2#機組1U4、1U6主管道銲口在銲接過程中齣現的疑似層間未鎔閤缺陷為例,分析瞭覈電工程主管道窄間隙自動銲的銲接特點,提齣瞭如何避免齣現銲接缺陷的措施;分析瞭覈電主管道厚壁鑄造奧氏體不鏽鋼的RT特點,採用銲縫中心透照及偏移銲縫中心兩次透照的方法,可以有效避免漏檢缺陷,同時,採取UT工藝是檢驗銲接質量和缺陷定位的良好實踐,可以廣汎應用于厚壁管的銲接檢驗。
문장이방가산핵전공정2#궤조1U4、1U6주관도한구재한접과정중출현적의사층간미용합결함위례,분석료핵전공정주관도착간극자동한적한접특점,제출료여하피면출현한접결함적조시;분석료핵전주관도후벽주조오씨체불수강적RT특점,채용한봉중심투조급편이한봉중심량차투조적방법,가이유효피면루검결함,동시,채취UT공예시검험한접질량화결함정위적량호실천,가이엄범응용우후벽관적한접검험。
Taking the 2# unit 1U4, 1U6 main pipe welding joint with suspected interlayer incomplete fusion defects in FangjiaShan nuclear power project as an example, this paper analyzes the narrow-gap automatic welding characteristics of main pipe, puts forward measures to avoid weld defects. The paper also analyzes the RT characteristics of nuclear power main pipe with thick casting austenitic stainless steel. Using the method of weld center transillumination and migration of weld center twice transillumination, can effectively avoid undetected defects. Also, the UT process is a good practice of welding quality inspection and flaw location, and could be widely applied on the welding test of thick walled tube.