backing weld

Progress in backing weld technology for stainless steel tubes

不锈钢管打底焊接工艺的进展

Penetrant flaw detection agent was used to detect the backing weld surface, and the number of cracks was indicated by surface crack rate.

打底焊缝正面使用渗透探伤剂探伤，用表面裂纹率表示裂纹的数量。

The progress of the backing weld technology for stainless steel tubes is reviewed.

综述了不锈钢管打底焊接技术的进展,指出了各种方法的特点及应用场合.

Investigation into Backing Weld Procedure Technique of All-position Narrow Gap and Thick-walled Pipe Welding

管道全位置焊接打底焊工艺研究

This paper describes the reasons for various kinds of defects of backing weld and their recognition on X_rays films It also introduces the protective measures for them

剖析带垫板焊缝中各种缺陷产生的原因及在射线底片上进行辨认的方法，并提出这些缺陷的防止措施

The Development of An All-Position Automatic Welder with STT Technology for Pipe Backing Weld

STT全位置自动打底焊机的研制

Basic flux-cored wire for backing weld to T91 tube was studied in this paper.

研究了用于T91钢管打底焊的碱性渣系药芯焊丝。

Indirect Quirk Backing Weld of Thick-walled Vessel

厚壁容器的单面深槽打底焊