注意：所有阀体带固定承插连接端口的阀门必须安装在开阔的地方，使得粘固剂蒸汽能够顺畅蒸发而不会损坏内部部件。
CAUTION: all valves with fixed socket end connectors in the body must be installed in the open position to aid in evaporation of solvent vapors which can attack internal components.
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.
它们以前仅仅涵盖承插类型连接件。
将管件分成与管子连接的两端的承插部分（1）和中间的弯曲部分（2）。
The pipe fitting is divided into a socket part (1) of two ends connected with a tube and a central bending part (2).
加工成承插焊和螺纹混合的连接型式。
Fittings can also be processed into the combination models of socket and threading.
加工成承插焊和螺纹混合的连接型式。
Fittings can also be processed into the combination models of socket and threading.
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