摘要
KL2气田是我国大型的含CO2凝析气田,单井产量高,集输管网面临高压、高温、高氯离子条件下的CO2腐蚀,气田地面工程采用了双相不锈钢。由于双相不锈钢在我国油气田属于首次大规模使用,因此,双相不锈钢的技术要求对安全应用尤为重要。结合工程的特点和标准规范要求,对双相不锈钢2205的各种材料,包括钢管、管件、复合钢板等,提出了附加技术要求。其中特殊检验要求包括了耐现场环境的应力腐蚀试验,控制制造质量的有害金属间相试验检验等,其中金属间相试验采用ASTMA923方法B冲击韧性试验、方法C氯化铁溶液点蚀试验。工程成功运行6年,证明这些特殊技术要求达到了预期的效果。
KL2 Gas Field is a large CO2 condensate gas field with high output and its gas gathering and transportation pipelines suffer severe CO2 corrosion. Duplex stainless steel is used in the gas field development, since this kind of material is used largely for the first time in China’s condensate gas field development, its technical requirements are very important for safe application. Based on relative requirements in codes, standards and specifications followed in the gas field surface engineering design and combined with technical features of this project, additional technical requirements are put forward for steel pipes, fittings and clad steel plates made of duplex stainless steel. Special examination requirement in these additional technical requirements includes stress corrosion test being able to bear or endure environment conditions at site and detrimental intermetallic phase test being able to control fabrication quality, in which method B and C in ASTM A 923 is adopted respectively for impact toughness test and ferric chloride solution pitting corrosion test. The gas field has been developed for 6 years successfully, which has proved that these special technical requirements for duplex stainless steel have good effects for the project and are suitable to similar projects.
出处
《天然气与石油》
2011年第3期58-60,75,共4页
Natural Gas and Oil
基金
KL2气田地面建设工程资助项目(S2002-62D)
关键词
双相不锈钢
试验
金属间相
Duplex stainless steel
Test
Intermetallic phase
