All PT Coupling raw castings are manufactured from primary master ingot and/or virgin stocks and ferroalloys in U.S. foundries and machined in our own machine shop, Central Machine & Tool. Our petroleum handling couplings come with an advanced design self-locking handle and are designed to last longer, even under harsh conditions. Our Petroleum Handling Drop Elbows Boast Half the moving & replacement parts which makes our elbows the lightest weight and easiest to maintain in the industry.PT Coupling manufactures an extensive variety of products designed for petroleum handling. These include tank truck flanges, tight fill elbows, API for bottom loading, dry disconnect couplings and Wedgon breakaway fittings, as well as several products for vapor recovery. PT's petroleum handling products are made from quality aluminum or stainless steel, and built to last.