DELLOK Low Heat Exchanger U Tube , Seamless Stainless Steel U Bend Superheater Tube
- Mobile：+8613761381662
- Fax：+86 25 69755709
- Email：commercial@bestfintube.com
Description
ASTM A213 TP321 / 321H , Seamless Stainless Steel U Bend Superheater Tube
ASTM A213/A213M : Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
U-Bend Tubes are accordance with the Following Standards:
1. ASTM A688/ASME SA688
2. ASTM A803/ASME SA803
3. ASTM A556/ASME SA556
Steel Grade:
Ferrite | Austenite | Duplex | Super Duplex | Ni-Alloys | Titanium |
TP410 TP405 S44400 S44660 TP430 | TP304/304L TP316/316L TP316Ti TP317/317L TP321 TP347 | S31803 S32205 S32304 | S32750 S32760 | N06600 N08020 N00880 N08825 N08904 | Gr.2 |
Straight Tubes Maximum Length:
(Before Bending): 35000 mm.
Unit Leg Length
Min 1 Meter, Max. 16500 mm (For Max R=1500mm)
Heat Treatment
Stress Relieved After U-Bending (Bending Area Plus 300MM For Each Leg).
Hydrostatic Test After U Bending
Maximum Test Pressure 600 Bar, Holding time: 10 Sec.
Medium: Dematerialized Water.
Compressed Air Cleaning After Hydro-Test.
Packaging
In Strong Transport-Worthy Pre-fumigated wooden boxes of corresponding dimensions for
each tube Length, Radius, Diameter, According To PO requirements as well as wrapped In polyethylene
films With soft plastic caps on both end of Tube.
General Quality Tests
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Supplementary Testing : Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing. The tests conducted under this include:
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