Oil prices are at six-year lows but business remains robust for pipeline manufacturer Polyflow LLC, who has now opened the company's third office in the Eagle Ford shale region. Polyflow LLC moved into a leased two-acre facility off IH-35 in Dilley earlier this month. Sales director Jeremey Hohn told the San Antonio Business Journal that the Dilley location will serve as an operations yard and sales office. Got Energy Sign up for our Energy Inc. newsletter here Polyflow provides flexible and…