这个标准涵盖采用承插热熔和对焊热熔方法对聚烯烃材料管道和连接件进行热连接的程序。
This standard covers the procedures for the heat joining of pipe and fittings made from polyolefin materials utilizing either the socket or butt fusion methods.
济南不锈钢管的衔接方法常用的有对焊衔接、承插焊衔接以及管螺纹衔接。
Ji 'nan stainless steel pipe connection methods are commonly used welding connection, socket welding connection and pipe thread connection.
目前有三种不同类型：带螺纹的，碰焊，承插焊接。
There are available in three different kinds: threaded, butt-weld, and socket weld.
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