The milling process of X65 pipe steel and the inspection data of mechanical properties (tensile strength, DWTT and hardness)are introduced in detail.
详细介绍了X65卷板的生产流程和有关力学性能（拉伸性能、冲击性能及硬度）的检验结果。
The characteristics of corrosion fatigue crack propagation of X60 pipe steel at different loading frequencies and in different corrosion media were studied.
研究了不同腐蚀介质中及加载频率下x 6 0管线钢的腐蚀疲劳裂纹扩展特性。
After the water quenching of the drill pipe steel grade, the cooling method of drill pipe welds is changed to the quick water cooling instead of the previous high-pressure air cooling.
钻杆钢种水淬化后，焊缝热处理的冷却方式由以前的高压空气冷却转变为快速水冷却。
This research topic is an integral part of the "research on the Heat-stewed BendTechnology of X80 Pipe Steel" by CNPC.
本课题作为中国石油天然气集团公司“X80级管线钢管热煨弯管技术研究”的一部分。
The main properties of RPM pipe are introduced and compared with the properties of the plastic pipe, steel pipe, ductile iron pipe and reinforced concrete pipe.
本文介绍了RPM管的主要性能，并与塑料管、钢管、球墨铸铁管及钢筋混凝土管的相应性能作了分析和比较。
In this paper, the traditional HAZ grain growth model is analyzed. Based on the model, analytical model of austenite grain growth fit to high strength pipe-steel is introduced.
分析了传统的焊接热影响区（HAZ）晶粒长大模型，在此基础上，介绍了适用于高强度管线钢的奥氏体晶粒长大的耦合模型。
It is forbidden to throw steel pipe, steel, wrenches and other materials and tools, so as not to destroy the waterproof layer.
严禁抛掷钢管、钢筋、扳手等材料和工具，以免破坏屋顶防水层。
It is forbidden to throw steel pipe, steel, wrenches and other materials and tools, so as not to destroy the waterproof layer.
严禁抛掷钢管、钢筋、扳手等材料和工具，以免破坏屋顶防水层。
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