Abstract

Polyurethane (PU) foam insulation is widely used on various process purpose pipelines. However, on PU foam insulated pipelines, due to problems with self-compensation of thermal expansion, more intensive damage development of girth welded joints is observed. The article presents experience in solving the problem of timely detection of welded joints with developing damage ahead of the estimated time through the use of complex diagnostics on heat lines and gas and oil PU foam insulated pipelines using non-contact magnetometric express inspection in combination with additional non-destructive testing in areas of test drilling and insulation opening.

中文翻译：

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聚氨酯泡沫保温管道焊缝损伤诊断

摘要

聚氨酯（PU）泡沫绝热材料广泛应用于各种工艺用途管道。然而，在聚氨酯泡沫保温管道上，由于热膨胀自补偿问题，环焊缝损伤发展更为严重。本文介绍了通过使用非接触式磁力快速检测并结合附加技术对热线和天然气和油 PU 泡沫绝缘管道进行复杂诊断，解决及时检测提前出现损坏的焊接接头问题的经验。测试钻孔和绝缘开口区域的无损检测。