To ensure the quality of welding products, welding procedure evaluation must be made before welding construction.
为确保产品的焊接质量，在正式焊接施工前必须进行焊接工艺评定。
It analyzed the transmission rule of sound wave in steel tubular welding construction aims at the geometry of tube-tube joints.
针对管-管节点的几何特征，分析了声波在钢管焊接结构中的传播规律。
The performance, advantages and disadvantages of PE pipe material and the main points in quality management of welding construction are discussed.
论述了PE燃气管材的性能和优缺点、焊接施工质量管理要点。
Based on viaduct over airport expressway in Zhengzhou, this paper mainly expounds supervising measures about full-welding construction of steel box girder.
结合郑州跨机场路高架桥，主要阐述了全焊接钢箱梁施工的监理措施。
Substituting inner-hole welding construction for traditional end surface welding construction is a fundamental method for raising the stabilities of anti-stress corrosion and anti-slit corrosion.
用内孔焊结构代替传统的端面焊结构是提高换热器管子与管板焊接接头抗应力腐蚀和缝隙腐蚀稳定性的根本途径。
Substituting inner-hole welding construction for traditional end surface welding construction is a fundamental method for raising the stabilities of anti-stress corrosion and anti-slit corrosion.
用内孔焊结构代替传统的端面焊结构是提高换热器管子与管板焊接接头抗应力腐蚀和缝隙腐蚀稳定性的根本途径。
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