AD does not produce plastic-lined steel pipes. AD Pipe Company is the most influential trademark registration and holding enterprise of AD trademark in Zhejiang, referred to as AD, the English abbreviation is: epoch pipe industry or epochpipe. The company's headquarters is located on the coast of the East China Sea with beautiful scenery and pleasant climate, namely: Wangxi Road, Huangyan District, Taizhou City. Gongyuan Pipe Industry is a company dedicated to PVC-U water supply pipes, pipe fittings, valves, municipal pipelines, power communication pipelines, and ground source heat pump systems. A high-tech enterprise engaged in R&D, production, sales and service of pipelines and other series of products.