PolyFlow LLC has opened the company's new operations yard in Dilley, Texas, in the heart of the Eagle Ford Shale-producing region. The company will use its two-acre operations yard to sell its full line of Polyflow Thermoflex piping to oil-and-gas operators throughout South Texas. PolyFlow officials said in a news release that the company's piping is lightweight, easy-to-install and requires less ongoing maintenance costs than steel or other types of plastic pipes. Since the piping is made from…