In order to avoid the risk of ferrous sulfides spontaneous combustion during the pigging operation in the submarine gas pipeline,the internal corrosion products of this pipeline have been analyzed by means of energy disperse spectrometer,X-ray diffraction and micro calorimeter.The results show that the internal corrosion of submarine gas pipeline is mainly caused by H2S,nature gas transported through this pipeline contains H2S,and the H2S solution forms in the presence of condensate water,then leads to the corrosion for this pipeline;the major internal corrosion products of submarine gas pipeline is FeS and FeS2,which have higher risks of spontaneous combustion,the internal corrosion products which has spontaneously combusted still have the possibility of spontaneous combustion under certain conditions.Some effective preventive measures are proposed to prevent spontaneous combustion accidents of sulfur iron compounds.
关键词
海底输气管道/内腐蚀产物/硫铁化合物/自燃/预防措施
Key words
submarine gas pipeline/internal corrosion products/sulfur iron compounds/spontaneous combustion/preventive measures
维普
万方数据