涂塑钢管管道接头的连接和防腐蚀方法

指出徐塑钢管接头处的连接和防腐蚀是制约涂塑钢管推广应用的瓶颈,介绍了内(外)涂塑钢管接头连接和防腐蚀的几种实用方法。塑料防蚀带缠绕包覆法、收缩带包覆法、火焰喷涂法等外补口方法以及螺纹连接、沟槽连接、法兰连接、滑入式接口、内衬短管焊接等内补口方法较为实用。补口机内补口技术,只适宜长距离直管道,且设备复杂;记忆合金材料内补口技术,成本高,应用较少。只要注意补口涂层施工质量,严格操作规程,其质量是可靠的。

Connection and Corrosion-prevention Methods for Plastic-coated Steel Tube Line

It is emphasized that the connection and connection corrosion-prevention of plastic-coated steel pipe line is just the bottleneck impeding spreading application thereof. Several methods currently used at home and abroad for connection and connection corrosion-prevention of plastic-coated steel pipe line are described. Among the said methods there are the technique of inner joint-repair with the special machine which is too complicated and applicable for long-distance pipe line only and the technique of inner joint-repair with memory alloy material which is used with a very narrow scope due to high operational costs. The other methods include techniques for outer joint-repair like wrapping with anti-corrosion plastic tape or shrinking tape and flame spray and techniques for inner joint-repair like thread connection, groove connection, flange connection, slide-in connection and welding of internally-lining short-pipe, which are all rather applicable and enable reliable quality of joint repair and coating provided the engineering quality is well controlled and the relevant operation procedures closely followed.