聚乙烯管的插入为太平洋燃气和电力公司节省了35%的常规挖沟成本。如果满足某些标准，水行业也可以使用塑料插入。考虑因素包括压力、流量减少、功能、温度变化和施工技术。包括5个参考文献、表格和图表。

Insertion of polyethylene pipe has saved the Pacific Gas and Electric Company 35 percent of conventional trenching costs. Plastic insertion can be used by the water industry, too, if certain criteria are met. Considerations include pressure, reduction in flow capabilities, function, temperature variations, and construction techniques. Includes 5 references, tables, figure.