成品油长输管道冬季焊接防护措施

宁夏石化成品油外输管道工程沿线耕地较多,为降低成本,需在气温较低的冬季耕地、无经济作物时施工。冬季焊接施工主要采用焊前预热、使用防风棚、保持层间温度、焊后后热保温和挡板封堵等措施保证质量。对L245管线钢采取上述措施保证焊接质量,焊接接头经力学试验和射线探伤检测,一次性合格率99.64%,符合质量标准要求。既保证了冬季焊接质量,又控制了施工成本,经济和社会效益明显。

Protective measures of welding in winter of long-distance refined oil pipeline

Along the pipeline engineering of refined oil transportation produced by Ningxia Petrochemical Corporation,there are many cultivated lands,in order to reduce the cost,the pipeline engineering should be constructed in winter when the temperature is low and there are no cash crops.Welding in winter construction mainly takes measures such as preheating,windbreak shelter,keeping interpass temperature and post welding heat treatment,flap closure and so on,to ensure the welding quality.When the measures accounted above are used in the welding of L245 pipeline steel,the radiographic inspection test and mechanical properties of weld joint one-time qualified quality reaches 99.64%,which can satisfy the quality standards.Moreover,after the quality assurance measures are taken in the winter construction,the quality of the weld has been improved,the cost has been reduced and following great economic and social benefits.