管线清管的目的是清除焊接时留在管道内的泥沙、焊渣等杂物，为管线测径和管线正常运行提供保障。
The purpose of the pipeline pigging is clear in pipe welding of mud, welding slags sundry, for pipeline caliper and normal operation of pipeline to provide security.
焊管经张力减径机处理后有人称之为“焊管无缝化”，这种焊管与无缝钢管在一些质量指标上仍存在差异。
After welded pipes are treated by reducing tension mills known as "welded pipe seamless process". There are still some differences between welded pipe and seamless pipe in quality index.
在成型和定径时运用成组技术，可用一套开口孔型辊、定径辊生产一组外径相近的焊管。
With the grouping technique it is allowed to produce a group of tube sizes with similar O.
海洋平台构件中的导管、撑管，因管径小，其环焊缝只能采用单面焊双面成型焊接工艺。
Owing to the small diameters of conduit pipes and bracing tubes, the girth welding has to be done with one side welding both sides formation technology.
简要介绍了等径焊接三通自动焊的设备结构、工作原理以及典型工艺。
This article introduces the construction, working theory and typical technology of automatic welding equipment for equal diameter welding tee to solve the low efficiency by manual welding.
应尽量少用长径异径对焊弯头。
Reducing long radius butt weld elbows shall be kept to a minimum.
研究表明，用多个扇形模具块对焊管端口进行机械扩径时，椭圆管坯的塑性变形具有显著的局部特性，且主要集中于悬空段。
The study shows that plastic deformation of the elliptical tube which has a significant local characteristic mainly concentrates in the vacant section, when expanding using several expanding punches.
目前，国内大跨径悬索桥钢箱梁大多为全焊结构，具有结构复杂、熔透焊缝多，制造难度大等特点。
The domestic steel box beam for long-span suspension bridge is mostly welded structure at present, which features complex structure, a great deal of penetration welds, difficult manufacture.
焊接变压器采用了新型高效焊网变压器，调档可分为八个级别，扩大了焊接丝径范围。
Welding transformer applies new high efficient fence welding transformer with eight shifting grades that expand welding wire diameter range.
中径电阻焊管生产线，用来生产圆管、方管和矩形管，起始原料是根据BTM 520标准的76- 165 mm的热轧和冷轧钢卷。
ERW pipe and profile machine complete line to manufacture, round square and rectangular pipes. install and start the BTM520 (76-165mm) hot and cold rolled steel coils.
中径电阻焊管生产线，用来生产圆管、方管和矩形管，起始原料是根据BTM 520标准的76- 165 mm的热轧和冷轧钢卷。
ERW pipe and profile machine complete line to manufacture, round square and rectangular pipes. install and start the BTM520 (76-165mm) hot and cold rolled steel coils.
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