Then, if needed, the pipe undergoes heat treatment or just goes to the quality testing line.
然后，如果有需要，这些管子将经过热处理或者直接进入质量测试环节。
The problem is that testing has to use that thin pipe to discover failures.
问题是测试必须使用那个细管道来发现错误。
Renewal of qualification may be made for any process by welding a single test coupon of either plate or pipe, and by testing of that coupon as required by QW-301 and QW-302.
如需重新获得资质，则该焊工需要遵照QW - 301和QW - 302的要求，在一个板材附件试片，或一个管材附件试片上，进行焊接试验。
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