STAINLESS STEEL U BEND TUBE, STAINLESS STEEL U SHAPED TUBES,HEAT EXHANGER TUBE, SEAMLESS STAINLESS STEEL U BEND TUBE, ASME SA 213 STAINLESS STEEL U BEND TUBE, EN10216 STAINLESS STEEL U BEND TUBE, HEAT EXCHNAGER TUBING, U BEND TUBING, AUSTENITIC STAINLESS STEEL U BEND TUBING, U BEND TUBES MANUFACTURE IN CHINA
U bend tube is one of components fixed to U bend heat exchangers by flow baffles or tube supports and placed in a shell to control the fluid present in the exterior of the tube assembly. The fluid is guided into the tubes by a head assembly which is fixed to the shell by bolts. Heat exchanger Tube is designed for heat transfer processing for heating, ventilation, cooling, condensation and evaporation of liquids, gases and steams. They are always made with cold finished condition as one of components placed inside the barrel for fabricating the shell & tube, plate & frame heat exchangers, cooling towers, air & seawater coolers, condensers, evaporators, heaters and re-heaters, etc.
Features
Ideal heat transfer performance: due to the excellent performance of stainless steel material and the use of thin-walled tubes with smooth inner walls to enhance the heat transfer effect.It has a high thermal conductivity and good isothermal.
High Safety: High temperature steam resistance, corrosion resistance and strong vibration resistance.
Processing Description
All U bend tubes' wall thining at the bend to be <17% of original tube wall thickness.
All U bend tubes' ovality at the bend to be <10% of original tube outside diameter.
After bending, solution annealing shall be carried out for those items, bend radius < 5D. The heating shall be done by electric resistance heating in a protective atmosphere and followed by rapid quenching.
Scale formed during the heat treatment shall be removed by pickling or polishing inside and outside surfaces.
All U bend tubes bends to be supplied with correct leg lengths,cut square and de-burred.
After bending, solution annealing and pickling, all U-tube shall be hydro tested.
On completion and final inspection, all U-tubes to be tagged with row number and packed in steel structure with plywood
Industries Applied
Nuclear Industry, Chemical Industry
Petrochemical industry, Food and Beverages
HVAC (Heating Ventilation Air Conditioning), refrigeration
Power Generation, Petroleum Refineries ,Natural-gas processing
General Information
| Outside Diameter (OD) | 12.7 - 38.1mm |
| Wall Thickness (WT) | 0.89 - 3.77mm |
| Bending Radius | From 1.5 * OD to 1500mm |
| Straight Tubes Max. Length | (Before Bending): 35000 mm |
| Leg Length | Min 1 Meter, Max. 16500 mm (For Max R=1500mm) |
| Initial Length | Maximum Lengths of 27000mm,Other Size Are Available Upon Agreement. |
| Straightness tolerance max | max. 1,5 mm per 1.0 m |
| Radius tolerance | +/- 3 mm for R 100 mm; +/- 5 mm for R ≥ 100 mm |
| Tube ends | vertically cut to the tube axis,covered with plastic caps |
| Heat Treatment | Stress Relieved After U - Bending (Bending Area Plus 300MM For Each Leg) |
| Packing Details | Vertical separators for eachradius,packing lists are placed on each plywood case for identification |
| Heat Treatment | Stress Relieved After U - Bending (Bending Area Plus 300MM For Each Leg) |
Standard
| Designation | Specification |
| ASTM, ASME Standards | |
| A213/SA213 | Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes |
| A269/SA269-15 | Seamless and welded austenitic stainless steel tubing for general service |
| A312/SA312 | Seamless and welded austenitic stainless steel pipes |
| A/789/SA789 | Seamless and welded ferritic-austenitic stainless steel tubing for general service |
| A790/SA790 | Seamless and welded ferritic-austenitic stainless steel pipe |
| DIN Standards | |
| DIN 17456 | General purpose seamless circular stainless steel tubes |
| DIN 17458 | Seamless circular Austenitic stainless steel tube subject to special requirement |
| DIN 28180 | Stainless steel heat exchanger tubes |
| DIN 17459 | Seamless Circular High Temperature Austenitic Stainless Steel Tube Subject To Special Requirement |
| European Standards | |
| EN 10216-5 | Seamless steel tubes for pressure purposes |
| JIS Standard | |
| JIS G 3459 | Stainless steel pipes |
| JIS G 3463 | Stainless steel boiler and heat exchanger tubes |
| GOST Standards | |
| GOST 9941 | Seamless stainless steel tubes, cold and hot finished |
| TU 14-3-460 | Seamless Steel Pipes for Steam Boilers and Pipelines |
Typical Material Grades and Chemical Composition
| Austenitic | Nearest equivalent standard | Typical Chemical composition | ||||||||
| ASME | AISI UNS | GB | EN | JIS | Cmax | Cr | Ni | Mo | Cu | Others |
| TP304 | S30400 | 0Cr18Ni9 | 1.4301 | SUS 304 | 0.08 | 18.0–20.0 | 8.0–11.0 | |||
| TP304L | S30403 | 00Cr19Ni10 | 1.4307 | SUS 304L | 0.035 | 18.0–20.0 | 8.0–12.0 | |||
| TP304H | S30403 | 07Cr19Ni10 | 1.4948 | SUS 304H | 0.04-0.1 | 18.0–20.0 | 8.0–11.0 | |||
| TP321 | S32100 | 0Cr18Ni10Ti | 1.4541 | SUS 321 | 0.08 | 17.0–19.0 | 9.0–12.0 | 5(C+N)<Ti< 0.7 | ||
| TP321H | S32100 | 1Cr18Ni9Ti | 1.4878 | SUS 321 | 0.04-0.1 | 17.0–19.0 | 9.0–12.0 | 4(C+N)<Ti< 0.7 | ||
| TP347 | S3470 | 0Cr18Ni11Nb | 1.455 | SUS 347 | 0.08 | 17.0–20.0 | 9.0–13.0 | 10×C<Nb<1 | ||
| TP347H | S34709 | 1Cr19Ni11Nb | 1.4912 | SUS 347 | 0.04-0.1 | 17.0–19.0 | 9.0–13.0 | 8×C<Nb<1.10 | ||
| TP316 | S31600 | 0Cr17Ni12Mo2 | 1.4401 | SUS 316 | 0.06 | 16.0–18.0 | 10.0–14.0 | 2 | ||
| TP316L | S31603 | 00Cr17Ni14Mo2 | 1.4404 | SUS 316L | 0.03 | 16.0–18.0 | 10.0–14.0 | 2 | ||
| TP316H | S31609 | 07Cr17Ni12Mo2 | 1.4919 | SUS 316H | 0.04-0.1 | 16.0–18.0 | 11.0–14.0 | 2 | ||
| TP316 Ti | S31635 | 0Cr18Ni12Mo2Ti | 1.4571 | SUS 316Ti | 0.03 | 16.0–18.0 | 10.0–14.0 | 2 | N0.015(C+N)<Ti< 0.7 | |
| TP317 | S31700 | 0Cr19Ni13Mo3 | 1.4438 | SUS 317L | 0.08 | 18.0–20.0 | 11.0–15.0 | 3 | ||
| TP317L | 31703 | 00Cr19Ni13Mo3 | 1.4438 | SUS 317L | 0.03 | 18.0–20.0 | 11.0–15.0 | 3 | ||
| TP309S | S30908 | 06Cr23Ni13 | 1.4833 | SUS 309S | 0.8 | 22.0–24.0 | 12.0–15.0 | |||
| TP310 | S31000 | 20Cr25Ni20 | 1.4841 | SUS 310 | 0.08 | 24.0–26.0 | 19.0–22.0 | |||
| TP310S | S31008 | 0Cr25Ni20 | 1.4845 | SUS 310S | 0.1 | 24.00-26.0 | 19.00-22.0 | |||
| TP310H | S31009 | 1.4845 | SUS 310H | 0.08 | 24.0–26.0 | 19.0–22.0 | ||||
| TP904L | N08904 | 015Cr21Ni26SiMo5Cu2 | 1.4539 | SUS 904L | 0.02 | 19.0 – 23.0 | 23.0 – 28.0 | 4 | 1.0-2.0 | |
| Austenitic Ferritic Steel / Duplex Stainless Steel | ||||||||||
| 2101 | S32101 | 1.4162 | DP2 | 0.04 | 20.0-23.0 | 1.0-3.0 | 0.1 | 0.1 | N 0.20 | |
| 2205 | S32205 | 022Cr23Ni5Mo3N | 1.4462 | DP2 | 0.03 | 21.0-23.0 | 4.5-6.5 | 3 | N 0.14 | |
| S31803 | S31803 | 022Cr22Ni5Mo3N | 1.4462 | DP2 | 0.03 | 21.0-23.0 | 4.5-6.5 | 2.5 | N 0.08 | |
| 2304 | S32304 | 1.4362 | DP2 | 0.03 | 3 | <0.05-0.6 | 0.6 | N 0.2 | ||
| 2507 | S32750 | 022Cr25Ni7Mo4N | 1.441 | DP2 | 0.03 | 24.0-26.0 | 6.0-8.0 | 3 | 0.5 | N 0.32 |
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