The Precision Tubes plant has added a new 4inch Mill from OTO Mills to its existing 2inch and 3 inch mills, thereby extending the Precision Tubes range to 114.3 Outer Dia and 6mm thickness with a combined capacity of 90,000 tonnes per anum.
Key features of the 4 inch new Precision Tubes Mill
- The new mill is powered by world class technology from OTO Mills, LOI Thermoprocess, Bultmann and MAIR Research
- ERW range from 31.75mm to 114.30mm OD with thickness range of 1.50mm to 6.00mm
- Cold Drawn Tubes from 15mm to 105mm OD with thickness range of 1.0mm to 5.50mm
- Advanced coolant filtration and Solid State Welder for consistency in weld and controlled internal bead
- Fully integrated Cold Draw line with high speed cold draw bench, multi roll straightener, NDT, multi head tube cutting and packaging system
- Bright annealing furnace – fully automatic roller hearth furnace with provision for Normalising, Annealing and Tempering
- Matching surface treatment facility with tube transporter, auto dip and temperature control
- Shock Absorber and Telescopic Front Fork customized tube cutting line to suit customer’s length specification
- Enhanced surface quality of dawn tube through use of reactive oil with bright annealed tubes
Strength of Tata Precision Tubes
- Weld quality
- In house steel raw material with typical high fatigue strength properties
- Capability to supply high strength tubes with high ductility
- Capability to offer ERW / CEW tubes with low tolerances on OD and thickness
- Bright normalized surface requirements on request
- TS 16949 certified and recognized as “Self Certified Boiler Tube and Pipe Manufacturer” under Indian Boiler Regulations
- In house R&D integrated with resources across Tata Steel group
Strength of Tata Steel in the Hydroforming Business
- In-house Tube and steel making facilities.
- Availability of customized steel grades.
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In-house Hydroforming expertise with Tata Steel Europe
- R & D capability including simulation tools and expertise
- Complete solution to OE from Conceptual design to Prototyping and final supply of component.
- Access to data base & experience on Hydroforming process and component design of Tata Steel Europe Hyfo & Tata Steel Europe RD&T.
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Applications
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Attributes
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| Specification | Grade |
Rm Kgt/mm2 N/mm2 Min. |
Re Kgt/mm2 N/mm2 Min. |
Crushing Test %mm | Chemical Composition |
Tolerances
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| C% | Mn% | Mean Outside/ Inside Diameter | Tolerance +/- mm | Thickness | Tolerances on Mean Thickness | |||||||||
| Min. | Max. | Min. | Max. | Over mm | U.T.I mm | Over mm | U.T.I mm | +/- mm | ||||||
| IS: 3074-2005 |
CEW-1 (annealed) |
32 310 |
17 160 |
50 | - | 0.12 | - | 0.60 | - | 38 | 0.10 | - | 2 | 0.08 |
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CEW-1 (as drawn) |
44 430 |
38 370 |
25 | - | 0.12 | - | 0.60 | 38 | 51 | 0.13 | ||||
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CEW-2 (annealed) |
44 430 |
28 270 |
50 | - | 0.25 | - | 1.20 | 51 | 64 | 0.16 | ||||
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CEW-2 (as drawn) |
56 550 |
46 450 |
25 | - | 0.25 | - | 1.20 | 64 | 77 | 0.19 | 2 |
5 >5 |
0.10 2% |
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Rm: Tensile Strength; Re: Yield Strength; D: Outside Diameter; t: Wall Thickness
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Applications
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Attributes
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| Specification | Grade |
Rm Kgt/mm2 N/mm2 Min. |
Re Kgt/mm2 N/mm2 Min. |
Flattering Test | Drift Expansion on D% |
Chemical Composition
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Tolerances
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Thickness | |||||
| IS: 3074-2005 |
C%
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Mn%
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Mean Outside Diameter | Tolerance +/- mm | |||||||||
| min. | max. | min. | max | Over mm | U.T.I mm | ||||||||
| ERW-1 |
32 310 |
17 160 |
3t | 12.5 | - | 0.12 | - | 0.60 | - | 25 | 0.10 | +/- 8% (excluding the weld). The height of the internal tin shall not be greater than 60% of the specified wall thickness. | |
| ERW-2 |
39 380 |
25 240 |
5t | 10 | - | 0.25 | - | 1.20 |
25 51 |
51 63 |
0.13 0.18 |
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| ERW-3 |
44 430 |
28 270 |
8t | 7.5 | - | 0.35 | - | 1.30 |
63 76 |
76 88 |
0.20 0.25 |
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OUR CAPABILITY WITHIN ASTM A513 ROUND TUBINGS
A513 Standard Specification for Electric - Resistance - Welded Carbon and Alloy Steel Mechanical Tubing
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Specification
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Specified Condition of Tube Supply
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Our Capability
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Type No.
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Code Letter
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Description
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CD Range
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Thickness Range
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Condition
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Grade Designation
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ASTM A513
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1. | S.D.H.R | 'Sink Drawn' from hot rolled steel | 0.59" to 4.14" | 0.079" to 0.236" | Cold Sink Drawn and Stress - relieved | 1008 to 1050 |
| 2. | S.D.C.R. | 'Sink Drawn from cold rolled steel | 0.59" to 4.14" | 0.039" to 0.089" | Cold Sink Drawn and Stress - relieved | 1008 to 1050 | |
| 3. | M.D. | Mandrel Drawn | 0.59" to 4.14" | 0.039" to 0.22" | Mandrel Drawn and Stress - relieved | 1008 to 1050 | |
| 4. | S.S.I.D. | Special smooth inside diameter* | 0.59" to 4.14" | 0.039" to 0.22" | Mandrel Drawn and Stress - relieved | 1008 to 1050 | |
Note:
Tubing thickness will be approgriate to OD
* Surface smoothness of inside diameter - better than 32 microinches Ra
| Straightness |
1 in 600 in case of ERW and 1 in 1000 in case of CEW unless otherwise specifically arranged. |
| End Finish | Plain end, mill untrimmed finish |
| Surface Finish | Hot rolled pickled & cold rolled finish; based on end use requirements |
| Packing | Requirements fulfilled based on mutual agreement |
| Off-line | Nondestructive testing and hydraulic testing on request based on requirement and mutual agreement. |
