The Westlake Chemical Corporation of Houston has lost sales to a Canadian vinylpipe maker that is cutting back production because it can’t bid for some American jobs.
The following table is based on the guidelines of ASTM D 2855, "Standard Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride (PVC) Pipe and Fittings".
下表以美国材料实验协会ASTM D 2855“聚氯乙烯（PVC）管道和管件液状粘固剂连接标准规程”有关标准制定。