城镇燃气铸铁管网改造方式的概述

Summary of the Reconstruction of Cast Iron Pipeline for Urban Fuel Gas

当铸铁管输送的人工煤气被置换成天然气后,其承插接口和机械接口会因失去水分和芳香烃类物质而收缩,导致天然气泄漏。该文介绍了国内城市天然气置换时常用的几种对铸铁管进行改造的方法及其各自特点。

After manufactured town gas transmitted by cast iron pipeline is replaced by natural gas,fuel gas will leak out at the bell socket and mechanical connection because of shrinkage caused by water and aromatic hydrocarbon loss. The paper introduces some common ways of reconstruction of cast iron pipeline applied for urban natural gas change.