UPDATE 4-U.S. steel pipe makers defend energy business with trade case
July 03, 2013 at 20:36 PM EDT
July 3 (Reuters) - A group of U.S. companies that produce specialty steel pipe used to drill for oil and gas has launched one of the biggest steel trade cases in years, asking the U.S. International Trade Commission to stem what they say is a flood of unfairly traded products from nine countries.