DG Digest: PHMSA revisits requalification period for certain DOT 4-series cylinders, issues special permits

Summer doldrums this week as regulatory activity eases along. August is traditionally a slow month in our nation’s capital. PHMSA however stayed active and is the only player in this week’s digest. Here’s all the latest: PHMSA PHMSA is proposing to revise requirements on the requalification period for certain DOT 4-series specification cylinders in non-corrosive