.@TribLIVE letter: All 350 miles of Mariner East 2 pipe “wil aspwv1970-01-01T00:00:00-05:00January 1st, 1970|Twitter| .@TribLIVE letter: All 350 miles of Mariner East 2 pipe “will be bought from and rolled by American steel plants.” https://t.co/M5vgokD2rD Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkEmail