A Double-contained Testable Half-barrel Sump
Original Publication Date: 1986-Nov-01
Included in the Prior Art Database: 2005-Mar-09
The figure shows a design for chemical spill containment which uses two concentric 1/4" thick (or greater) steel vessels with an annular space in between. These steel vessels provide "double containment" for chemical spills. High integrity spill containment is assured by minimizing the number of welds (only two degree welds at ends of half-barrel), by improving the welds by using thicker steel, as well as providing an air pressurizable inner space to determine if primary and secondary steel vessels are leak free. If the steel containment is used for inorganics, the steel should be appropriately coated (both layers) for chemical resistance. An option for inorganics would be fused PVC or other durable plastic in the same configurations.