welding is carried out in the welding technological requirements.docVIP

下载本文档

3
0
约8.37千字
约 5页
2017-03-18 发布于贵州
举报
版权申诉

welding is carried out in the welding technological requirements.doc

1、本文档共5页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
5、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
6、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
7、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
8、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

Welding is carried out in the welding technological requirements, including the welding method, welding material, welding specification (current, voltage, energy), welding sequence and welding deformation and temperature control. (2) the weld defects Multi-layer welding interlayer exists defects such as cracks, porosity, slag inclusion, defect is cleared. (3) the welding equipment Welding equipment operation is normal, including welding power supply, wire feeding mechanism, roller frame, flux bracket, cooling device, running gear, etc. For large oil storage tanks, for example, side plate and side slabs seam welding, in order to reduce the deformation of floor surface for seam welding, welding inspection is particularly important. Welding in the welding test should be according to the following procedure: 1. The first pass local processing, if discover creates stress due to welding deformation cracks on butt weld root, application of carbon arc air gouging or polishing machine for a thorough treatment, and PT inspection qualified can be carried out only after the next step work arrangement, the inspection work is especially important for large storage tank. 2. Spot welding: at the end of the welding work above, the side surface outlet can produce buckling deformation in different degrees, make originally joint tight clearance between side plate and plate, must check before spot welding processing. 3. Welding: all side slabs seam after welding, and welding. Second, the inspection after welding (a) visual inspection 1. The use of low power magnifying glass or whether there is a macroscopic observation of weld surface bite edge, slag inclusion, porosity, surface defects such as cracks. 2. Use welding inspection ruler, measure the weld residual high, flash, sag hi-lo, etc. 3. Check whether welding deformation. For example, large vertical cylindrical storage tank welding appearance inspection requirements, bite side of the butt weld depth, shall not be greate