The paper states the preset, shape and building measures of after pouring seam, and finds out split reasons in after pouring seam and puts forward relevant countermeasures.
阐述了后浇缝的留置、形式和施工措施。找出了后浇缝产生裂缝的原因并提出了相应的对策。
The defects will be found in the seam side with ultrasonic inspection but hardly found with X ray inspection as the small diameter spiral pipe production with the split strip steel.
采用纵剪带钢生产小口径螺旋焊管时，超声波检验经常在焊缝的一侧发现缺陷波，而X射线拍片检验却很难发现。
The defects will be found in the seam side with ultrasonic inspection but hardly found with X ray inspection as the small diameter spiral pipe production with the split strip steel.
采用纵剪带钢生产小口径螺旋焊管时，超声波检验经常在焊缝的一侧发现缺陷波，而X射线拍片检验却很难发现。
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