日韩精品一区二区三区四区蜜桃,欧美专区,亚洲AV超清无码不卡在线网络,精品成在人线AV无码免费看

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.