污污污www精品国产网站_六十路av_午夜天堂av_台湾佬综合网_成人免费版欧美州_超碰色偷偷_西西444www无码大胆_亚洲拍拍视频_日韩欧美天堂_av在线网页_aaa亚洲精品_欧美一级爽片_精品在线一区二区_女郎av在线_午夜一区二区三区四区

the construction quality steel welding acceptance of the relevant provisions

Guangzhou Steel tells you: the construction quality steel welding acceptance of the relevant provisions

Guangzhou Steel tells you :( a) General provisions
Carbon structural steel should be cooled to ambient temperature in the weld, low-alloy structural steel welding should be completed after 24h, conduct inspection of welds.
(B) steel member Welding Engineering
1. Master Project
(1) Match rod, wire, flux, electroslag weld nozzles and other welding material and the base material shall comply with the design requirements and current national industry standard "construction steel welding procedure" JGJ81-2002; the electrodes, flux, medicine cored wire, melt in the mouth, etc. before use, should be required to its product specifications and welding process documents for baking and storage.
(2) welder must pass the examination and obtain a certificate. Certified welders welding must pass the examination in their projects and their scope of accreditation. Should fully examine all welders certificate and scope of accreditation, valid.
2. General Project
Weld feel should be achieved: a uniform shape, good shape, bead and bead between the bead and base metal transition smoother, welding slag and spatter basic clean.