CAJ | 학술논문

集油管线用塑料合金复合管在使用过程中发生了管体爆裂失效事故。为了探讨复合管的失效原因，采用红外光谱分析、差热-热重分析、VST等分析手段，研究了复合管用内衬塑料层和外结构层玻璃钢树脂基体的结构成分、热性能等。结果表明：复合管内衬材料添加剂含量较多或分散不均，而复合管玻璃钢基体树脂的玻璃化转变温度远低于标准要求。较低的固化度和偏高的树脂含量导致玻璃钢结构层力学性能下降，在长期服役过程中的老化及介质腐蚀共同作用下，复合管最终爆裂失效。
집유관선용소료합금복합관재사용과정중발생료관체폭렬실효사고。위료탐토복합관적실효원인，채용홍외광보분석、차열-열중분석、VST등분석수단，연구료복합관용내츤소료층화외결구층파리강수지기체적결구성분、열성능등。결과표명：복합관내츤재료첨가제함량교다혹분산불균，이복합관파리강기체수지적파리화전변온도원저우표준요구。교저적고화도화편고적수지함량도치파리강결구층역학성능하강，재장기복역과정중적노화급개질부식공동작용하，복합관최종폭렬실효。
An anticorrosion plastic alloy composite pipe for oil gathering and transportation failed during service. Investigations were performed to identify the possible failure causes of the pipe. Composition and thermal analysis of inner plastic alloy and outer GRP resin were systematically studied by using FTIR, TG-DSC, VST, etc. Results reveal that additives in failed plastic alloy may have not been stirred enough before extrusion or the content of additives may exceed their normal range. The glass transition temperature of GRP resin was much lower than that stated in standard. Hence, the lower state of cure for resin as well as the higher resin content of GRP layer makes the outer GRP structural layer have a relatively lower mechanical property, giving rise to the final failure of the composite pipe after serving for a long time under the co-effect of the aging and corrosion.