Used Ammonia Converter from a 1000 STPD Ammonia Plant with Haldor Topsoe basket built in 1997. The ammonia converter had a complete Halder Topsoe retrofit in 1997 and only operated for about 5 years after this upgrade. Built by Struther Wells, 2600 PSI DESIGN @ 475 DEG. F., 84.125" INSIDE DIAMETER x 75'2.8125" OAL; 4.125" shell thickness; 3.125" head thickness; 19,135 gallon water capacity.