Shanghai T.S. Industrial Co.,Ltd

"U" bent tubes for heat exchangers can be supplied in accordance ASME SA556, ASME SA179, ASME SA192, ASME SA213, ASME SA688, ASME SA803 Reference standards and Steel Grades: 304/304L Austenitic, 316/316L Austenitic, 2205 Duplex, 2507 Duplex,439 Ferritic ASTM A556 Gr. A2 - B2 - C2, ASME SA556 Sect.II Gr. A2 - B2 - C2 "U" Bent tubes in accordance with the standards detailed in table 1, part A can be requested. The bent area can be subject to stress relieving heat treatment by joule effect in inert atmosphere. - Minimum radius treated = 28 mm. - Maximum radius treated = 750 mm. 2. U bend Tube Bundle Dimensions and lengths Tubes with the following external diameters in mm can be bent a upon agreement: 15,8 - 16,0 - 17,0 - 18,0 - 19,05 - 20,0 - 21,3 - 25,4 - 26,7 - 31,8 -38,1. The minimum feasible radius is : 1,5 x external diameter The maximum feasible radius is 1500 mm. A556 U bend Tube 3. U bend Tube Bundle Tolerances Tolerances (diameter and wall thickness) according to ASTM A 556 or given in the standards detailed in table 1 point A are respected. Bending tolerances. The tolerances stipulated in ASTM A 556 are respected. Minimum wall thickness tolerances in the bent area conforming to the TEMA standard "Class R heat exchangers" can be requested or in accordance with specific requests. 4. U bend Tube Bundle Checks and test All the mechanical and technological tests stipulated in the cited standards are carried out. Leak tightness test: electromagnetic test (Eddy Current) is performed on straight tubes. Hydrostatic test on bent tubes is performed only if expressly requested, specifying the test pressure 5. U bend Tube Bundle Standard Technical Range OD 9.5mm - 38.1mm WT up to 6.35mm Bending radii 1.25 x OD up to 1700mm Bends can be supplied in accordance with TEMA R / ASTM SA/A556 Leg length up to 15000mm 6. U bend Tube Bundle Test Heat treatment where required by electric furnance or direct resistance Hydrotesting up to 10,000 psi
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