OnlineOilfield pipe tariff exemption deniedOil country tubular goods request turned down by US Department of CommerceRolls of steel are shown at the Borusan Mannesmann Pipe manufacturing facility Tuesday, June 5, 2018, in Baytown, Texas. Borusan is seeking a waiver from the steel tariff to import 135,000 metric tons of steel piping annually over the next two yearsKathrine Schmidt