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.
介绍了现代国际上高压输送天然气管道，管线钢及焊管的使用情况。
The service conditions of the international high-pressure natural gas transmission pipeline, pipeline steel and welded pipe at present are introduced.
研究了焊剂碱度对管线钢埋弧焊熔敷金属显微组织和韧性的影响。
The effect of flux basicity on the microstructures and toughness of SAW deposited metals on pipe line was investigated.
由于高压厚壁油气长输管线建设的迫切需求，采用自动GMAW焊是提高管线建设生产率的关键。
Due to the rapidly growing requirement for high-pressure heave-wall pipeline installation, mechanized GMAW process is a key technology for increase welding productivity.
文章叙述了X80管线钢的化学成分、力学性能，并重点介绍了采用全自动焊和手工焊的焊接材料及焊接工艺。
This paper depicts the chemical composition, mechanical performance of X80 line pipes, giving emphasis to the welding materials and welding processes of fully automatic welding and manual welding.
对低碳钢管线用的氩弧焊丝的化学成分、机械性能、可焊性能、耐腐蚀性能进行对比分析，为合理选用焊丝提供了依据。
The chemical composition, mechanic property, weldability and corrosion resistance of argon arc welding wire for low carbon steel pipe line are contrasted and analyzed.
介绍了俄罗斯直缝埋弧焊钢管和螺旋缝埋弧焊钢管的生产设备和工艺等制管技术以及独特的热处理管线钢管的特点。
The characteristic of pipe manufacturing technology and its unique heat-treatment pipe for pipeline for production units and processes of Russian LSAW pipes and SSAW pipes is introduced.
对国外高压输送天然气管线用钢的技术条件，管线用焊管的生产工艺和生产特点作了论述。
The technical condition of steel used in high-pressure natural gas transmission pipeline and the productive technique and feature of the welded pipe used in the pipeline is discussed.
指出管线运行载荷谱及焊管缺陷对石油管线的服役寿命有重要影响。
It is indicated that operational pressure spectrum and defects of pipeline has important influence on the lifetime of crude oil pipeline.
由于低屈强比和组织均匀，管线钢采用针状铁素体组织可以具有较好的（管）成型性及耐腐蚀性。 用针状铁素体管线钢平板或卷板制造的焊管的力学性能彼此相差不大。
Pipeline steel adopting the spicular ferrite owns the better properties of forming and anti corrosion for its low ratio of yield strength and tensile strength and uniform microstructure.
它可作为X80管线钢埋弧焊的推荐焊接规范。
It can be used as welding criterion of X80 pipeline steel submerged-arc welding.
宝钢开发以热连轧方式生产用于制造直缝埋弧焊管的海底管线用x 65级管线钢板，其产品具有高强度、高韧性和良好的焊接性等综合性能。
The grade X65 pipeline steel used for LSAW submarine line pipe has been developed at Baosteel, which is produced by hot continuum rolling processing.
直缝埋弧焊管是长距离输送石油、天然气的主要管线产品，钢管由厚钢板压制成形。
LSAW pipes, made by thick steel plates through compacting, are main pipeline products for long-distance transportation of oil, natural gas.
介绍了武钢在高性能管线钢埋弧焊、气保焊及手工焊焊接材料开发方面所作的工作。
The development work done by Wuhan steel with welding material for submerged arc welding, gas yield welding and manual welding of pipeline steel with high performance is introduced.
X级管线钢板材是生产直缝埋弧焊管的主要原材料。
The X grace steel sheet is used as main material for SAW straight weld pipes for pipe line purpose.
在苏丹管线用螺旋埋弧焊管生产过程中，根据钢级及强度匹配要求，选用J557焊条作为打底焊材料。
During the manufacturing of SSAW pipe for Sudan pipeline, J557 electrode shall be applied as bottom weld materials according to the matched requirement of grade and strength.
X80钢螺旋缝和直缝埋弧焊管的批量试制结果全部符合“X80级管线钢管应用工程”钢管技术条件的要求；
The results of batch manufacture grade X80 spiral and longitudinal submerged arc welded pipe all meet the pipe technical conations required by"Grade X80 Pipeline Steel Pipe Application Project";
提出了2 1世纪中国建设大口径直缝埋弧焊钢管生产线及管线钢用宽厚板国产化的必要性。
It also raises the necessity that China shall build LSAW pipe production line and produce wide and thick plate for pipeline steel in 21 century.
密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，使用寿命长、可通毛球清扫管线等特点；
Sealing surfaces are spray carbide, with corrosion, abrasion, erosion, etc. , long life, can pass the ball clean wool pipeline and other characteristics;
密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，使用寿命长、可通毛球清扫管线等特点；
Sealing surfaces are spray carbide, with corrosion, abrasion, erosion, etc. , long life, can pass the ball clean wool pipeline and other characteristics;
应用推荐