国产精品沙发午睡系列_久章草在线无码视频观看_三级国产国语三级在线_亚洲精品国产嫩草在线观看东京热_人成午夜大片免费视频77777_日本大片免费视频在线_综合久久久久久综合久_东京热久久综合伊人av_青草久久久国产线免费_亚洲国产精品成人久久久

Steel weld repair

Steel weld repair

Guangzhou Steel repair before the repair program prepared by the Guangzhou Steel Engineering technical director consent before implementation after approval by the Guangzhou Steel Engineer.
Guangzhou Steel weld repair process and quality requirements and the same weld, the weld repair the same part number should not be more than twice as twice still unqualified after repair, repair programs should be re-enacted by the project technical director agrees, newspaper engineer approval before implementation.
Welding should be in the groove arc, arc-quenching should be filled crater. Multilayer welding joints should be staggered between the solder layer.
Repair parts should be continuously welded, such as interrupts welding should be taken after the heat insulation measures to prevent cracks.
Preheating temperature welding repair should be higher than the preheating temperature under the same conditions normal welding.
Repair welds shall be furnished NDT report repair construction and repair records before and after, as the project acceptance and archives.