高钢级天然气输送管线钢强度特性

近十年来，随着天然气耗用量增大．管线钢技术也有了很大的发展，天然气能够安全、经济地输送，管线至关重要。比如近海天然气田深水管线对管线管壁厚和高韧性的要求，又如长距离输气管线对管线钢强度的要求在X80钢级以上，用以降低输气成本。为满足上述对安全和经济性的要求，制钢技术得到充分发展，X100级钢也因此得到进一步研究。然而，为使X100级钢管用于管线建设，还需要对X100钢的各种特性进行深入研究。如变形行为特征、焊接设计、动态延性断裂止裂、管材性能、X100管线建设规范等。

The Strength Characteristic of High Grade Gas Transmission Pipeline Steel

In recent ten years,pipeline steel technology also made great development through the augmentation of natural gas consumption.It is very important for pipeline to safely and economic transmission of natural gas,for example,it requires the pipeline WT and high toughness to deep water pipeline of offing gas field,and long distance gas transmission pipeline requires above X80 grade pipeline strength to reduce the gas transmission cost.To meet the above requirements of safety and economic,steel making technology gains sufficient development,therefore X100 Grade gained further study.However,it still need to further study all characteristics of X100 grade,such as characteristic of distortion action,welding design,dynamic ductibility fracture crack arrest,the property of pipe material and X100 pipeline construction specification for the X100 grade pipe applied on the construction of pipeline.