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一、9%Ni钢乙烯球罐基本情况北京燕山石油化工公司为确保三十万吨乙烯装置连续、稳定、安全生产,从法国CMA公司引进四具1500M~3乙烯球罐。内径14.45米,设计温度—24~—104℃,设计压力22kg·f/cm~2,操作温度—31℃,操作压力18.5kgf/cm~2。球壳板材质为X8Ni9,板厚δ=30mm,采用焊条牌号0K69·45球壳板及焊条化学成分见表1二、增加正三背二焊层透照是非常必要的用9%Ni钢材料制作乙烯球罐在国内还是首次,为此燕化公司组织了设计、施工和使用单位组成的小组赴法国进行初步审查和焊接工艺评定试验。在法国工作期间,发现了采用高许用应力设计,并采用非标准OK69—45焊条,用法方提供焊接工艺的施焊试板中,焊缝裂纹
First, the basic situation 9% Ni steel vinyl cans Beijing Yanshan Petrochemical Company to ensure that 300,000 tons of ethylene plant continuous, stable and safe production, from France CMA company to introduce four 1500M ~ 3 vinyl spheres. The inner diameter of 14.45 meters, design temperature -24 ~ -104 ℃, design pressure 22kg · f / cm ~ 2, operating temperature -31 ℃, operating pressure 18.5kgf / cm ~ 2. Spherical shell plate material X8Ni9, thickness δ = 30mm, the use of welding rod brand 0K69 · 45 ball shell plate and electrode chemical composition shown in Table 1 II is to increase the three back-two welding layer is very necessary to use 9% Ni steel material For the first time, the dome of the dome of the company in China has organized a team of design, construction and use units to go to France to carry out preliminary examination and welding process qualification test. Working in France, found that the use of high-stress design, and the use of non-standard OK69-45 electrode, the use of welding process to provide welding test panels, weld cracks