Stainless Steel U-tube 1) Material: 304,316 and so on. 2) ... : ASTM/AISI/DIN/JIS 3) OD : 1/2''-48'' SEAMLESS STAINLESS STEEL U-TUBES Features: 1) Specifications: OD: 8- 630mm and THK ... machinery, papermaking, heat preservation and refrigeration, mechanical equipment, food, electricity, water conservancy, architecture, aerospace, navigation shipbuilding, environmental protection and boiler heat ...