chemical composition testing of weld 焊缝金属化学成分检验
In this case, testing of the weld area of the finished pipe is not required.
在这种情况下，成品管道焊接区域的焊接试验并不是必需的。
Lifting and handling. Welded joints. Part 2: weld quality classes. Extent of the non-destructive testing.
提升和搬运。焊接接点。第2部分：焊接质量等级。无损检测范围。
These methods of testing are more costly than the other above mentioned tests and are ideal for use with weld coupons to determine the effectiveness of the passivation procedure for the system.
这些方法比上述检测方法费用要大，但它们是检测焊接样管以确定系统的钝化操作的效果的理想方法。
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