U BEND TUBE For Heat Exchanger

U-Bend TubeU-bend tubes are widely used in heat-exchanger systems. Heat-exchanger equipment on the basis of seamless stainless U-tubes is essential in strategically important and critical fields ? nuclear and petrochemical machine building.A tube-bending line,Website:http://www.unidusgroup.com, that was installed at our factory in the end of 2005, allows to produce U-tubes?as per such standards:1. ASTM A688/A688M2. ASTM A803/A803M3. ASTM A556/A556M, ASME SA-5564. ASME SA-179/SA213Steel Grades:Carbon & AlloyFerriteAusteniteDuplexSuper DuplexNi-alloysTitaniumA179 T11 T12 T22TP410TP 304 /?304L TP 316 /?316L TP 316Ti TP 317 /?317L TP 321 TP347S* S*S* S*N* N* N* N* N*Gr.2Tubes of other alloys and steel grades can be produced upon agreement. Technical requirements Straight tubes for bending: ASTM/ASME SA 179; SA 213; ASTM B 163; ASTM B 729; ASTM B 407; ASTM B 423; ASTM A 789 U-bend Tubes: -TEMA RCB 2.31 Standards of the Tubular Exchanger Manufacturers Association (9th edition). -ASTM A688 Standard specification for welded tubes of austenite corrosion resistant steel grade designed for feed water boilers. -ASTM B163 Standard technical requirements for tubes of nickel and nickel alloy for condensers and heat exchangers. -Customer specifications.? ? ? ? ? ??u bendingBENDING RADIUS: from 1.5 OD to 1250 mm.When ordering tubes with R?1.5D it is necessary to agree precision of geometrics.STRAIGHT TUBES MAXIMUM LENGTH (before bending): * mm.LEG LENGTH: min 1 meter, max 10.5 meters (for max R=1250 mm)Note: other sizes are available upon agreement.HEAT TREATMENT: Stress Relieved after U bending.HYDROSTATIC TEST: maximum test pressure 600 bar, soaking 10 sec. with demineralized water. Compressed air cleaning after hydro-test.Marking: before bending by marking machine all over the tube length (bent section after heat treatment without marking).Marking is also possible after bending on the straight parts of U-bent tube.Packaging: closed wooden boxes of corresponding dimensions for eac....

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