PBS Water Tech [P] Ltd. Offers Heat Exchanger with 250 mm Tube Sheet Thickness. PBS Water Tech [P] Ltd. Is an ISO 9001:2000 certified company. Heat Exchanger with 250 mm Tube Sheet Thickness is available in diameter 3000 mm x length 10000 mm with 50 tons equipment weight, 63 mm shell thickness and 600 Kg/cm2 test pressure. Heat Exchanger with 250 mm Tube Sheet Thickness comes with duplex stainless steel, stainless steel, alloy steel finishes.