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确定预制直埋保温管聚乙烯外护管(层)壁厚时主要考虑以下因素:对防腐的要求,聚乙烯外护管(层)应力水平的要求,埋地条件下承受垂直土压力的要求,管材在吊装运输储存过程中的防护要求,接头补口电热熔焊接、承受土壤应力要求。基于以上要求,对喷涂缠绕保温管的聚乙烯外护层壁厚减薄成因进行分析。
Determine the prefabricated buried pipe insulation polyethylene pipe (wall thickness of the main factors to consider the following: the requirements of anti-corrosion, polyethylene outer protective layer (layer) stress level requirements, buried under the conditions to withstand vertical earth pressure , Pipe in the hoisting transport storage process of protection requirements, joints fill electric welding, to withstand the soil stress requirements. Based on the above requirements, the causes of the thinning of the polyethylene sheath of the spray-wrapped insulation tube were analyzed.