PBS Water Tech [P] Ltd. Offers Stainless Steel Column. PBS Water Tech [P] Ltd. Is an ISO 9001:2000 certified company. Stainless Steel Column is available in diameter 5000 mm x length 20000 mm with 50 tons equipment weight, 50 mm shell thickness. Stainless Steel Column comes with duplex stainless steel, nickel alloy, alloy steel finishes.