Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASME SA213 Stainless Steel Seamless TP304L Bend U Boiler Tube
YuHong can offer SA213/A213 seamless stainless steel bend U tubes and we sell these products with highest quality in more than 70 countries.
ASME SA213 / ASTM A213 This specification covers seamless ferritic and austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades T5, TP304, etc.
U tubes are manufactured by bending straight tubes. Bending is done cold on an automatic U-bend. To ensure tube wall thinning and diameter ovality are controlled, tube bending is accomplished with a mandrel inserted into the tube. What's more, the U-bend of the U-tube is stress relieved under controlled conditions and cycles for extended life.
Specifications
| Sizes / Thickness | Sizes and thicknesses usually furnished to this specifification are 1 ⁄ 8 in. [3.2 mm] in inside diameter to 5 in. [127 mm] in outside diameter and 0.015 to 0.500 in. [0.4 to 12.7 mm], inclusive, in minimum wall thickness or, if specifified in the order, average wall thickness. | ||||
| Manufacture | Tubes shall be made by the seamless process and shall be either hot finished or cold finished, as specified. | ||||
| Heat Treatment | seamless tubing immediately following hot forming may be individually quenched in water or rapidly cooled by other means, provided that the temperature of the tubes after hot forming is not less than the minimum specifified solution temperature (direct quenched). | ||||
| Length | As required by clients | ||||
| Surface Condition | 1.Cold-fifinished steel tubes shall be free of scale and suitable for inspection. A slight amount of oxidation is not considered scale. 2.Hot-fifinished steel tubes shall be free of loose scale and suitable for inspection. 3.Stainless steel tubes shall be pickled free of scale.When bright annealing is used, pickling is not necessary. | ||||
| Bending Radius | From 1.5*OD(Outside Diameter) To 1500mm, ≤1.5*OD,necessary To agree precision of geometrics | ||||
| Straight Tubes | max length 35000mm | ||||
Test Required Bend U tube
1.Corrosion Test
2.Chemical Analysis
3.Mechanical Tests: Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test
4.Reverse-bend and Re. flat tests
5.Eddy Current Testing
6.Hydrostatic Testing
7.Air Under Pressure Test
8.Visual Inspection
Chemical Composition S30403
| Chemical Composition | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Cr | Ni |
| 0.035 | 2 | 0.045 | 0.03 | 1 | 18-20 | 8-12 |
For small diameter or thin walls, or both, where many drawing passes are required, a carbon maximum of 0.040% is necessary in Grades TP304L.
Mechanical Property
| Steel Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness max |
| TP304L | 485min | 170min | 35min | 192HBW/200HV 90 HRB |
Applications Industry
Pharmaceutical Equipment
Off-Shore Oil Drilling Companies
Chemical Equipment
Power Generation
Sea Water Equipment
Petrochemicals
Heat Exchangers / Condensers / Boiler
Gas Processing
Specialty Chemicals
Pulp and Paper Industry
