海外油田用X52NS/825冶金复合钢管的开发及性能研究

Development and Performance Study of X52NS/825 Metallurgical Clad Steel Pipe as to Serve in Oversea Oilfield

分析复合钢管成型工艺的优缺点,针对原油含有腐蚀性介质的特点,以国产X52NS/825轧制复合板通过JCO成型以及PAW+SAW+GTAW组合焊接工艺开发出X52NS/825冶金复合钢管。对X52NS/825复合钢管管体和焊缝的化学成分、拉伸性能、冲击性能、硬度和基材的抗HIC和SSC性能,以及覆层的耐点蚀和晶间腐蚀性能进行检测。结果显示:X52NS/825复合钢管的各项性能远优于技术标准要求,具有较好的力学性能和耐腐蚀性能,可用于高含硫含盐的油田地面管道。

Analyzed here in the paper are the advantages and the disadvantages of the formation process for the clad steel pipe.Addressing the characteristic quality of the crude oil that contains corrosive medium of the targeted overseas oilfield,the X52NS/852 metallurgical clad steel pipe is developed by means of using the home-made X52NS/852 rolled clad steel plate as the blank,and employing the JCO formation process and the PAW+SAW+GTAW integrated welding process.All the major performances and properties of both the body and weld seam of the said clad pipe are inspected and tested,including chemical composition,tensile property,impact property,hardness,HIC and SSC resistance of the base metal as well as pit-corrosion and inter-granular corrosion resistance of the cladding layer,etc.It is proved via the test results that the X52NS/825 metallurgical clad pipe as developed is in possession of all the performances and properties as better than what specified under relevant technical specification,being capable of servicing as the ground piping of the oilfeld highly containing sulfur and salt due to its good mechanical properties and corrosion-resistance.