Boiler Bank Tubes Manufacturer India | Generating Bank Tubes
Convection Generating Tube Bundles with Swaged & Annealed Ends
Generating bank tubes connect the upper steam drum to the lower mud drum in bi-drum water-tube boilers. Precision bent on computerized mandrel benders, each tube is guaranteed to exact curvature templates. Specially annealed tube ends ensure zero-leak roller expansion tightness into drum tube holes without work-hardening or micro-cracking.
What is Boiler Bank Tubes?
Boiler Bank Tubes (generating bank tubes) are convective evaporative tube nests connecting the upper steam drum to the lower water/mud drum in bi-drum water-tube boilers, creating the primary natural convective steam circulation loop. Modern Boilers Pvt. Ltd. manufactures precision CNC-bent boiler bank tubes from cold-drawn seamless carbon steel (ASTM SA210 Gr. A1/C, SA192, BS 3059). Every tube end is precision cropped, cold swaged, and bell annealed to guarantee zero-leak, crack-free roller expansion tightness into drum tube holes with curvature template accuracy within ±1.5 mm.
Manufacturing & Engineering Parameters
Every component is designed, formed, and tested under strict adherence to the Indian Boiler Regulations 1950 and ASME Section I Power Boilers code.
| Material Grade | ASTM SA210 Gr. A1, ASTM SA192, BS 3059 Part 1 |
| Standard Diameters | 50.8 mm (2"), 63.5 mm (2.5"), 76.2 mm (3") |
| Wall Thickness | 3.6 mm, 4.0 mm, 4.5 mm seamless |
| Tube End Processing | Cold swaged, precision cropped, and bell annealed |
| Bending Accuracy | ± 1.5 mm template compliance across entire nest |
| Expansion Allowance | Machined for standard 0.05 mm roller expansion clearance |
| Hydrostatic Test | 100% individual mill hydro-test + assembly test |
Industrial Applications & Boiler Types
- Bi-drum industrial steam generators (10 TPH to 120 TPH)
- Sugar factory bagasse co-gen boilers
- Full furnace re-tubing overhauls during planned annual plant shutdowns
- Waste heat recovery boilers with convective evaporator banks
Quality Control & NDT Testing
- Supplied in color-coded sequence nests for error-free site erection
- Drift expansion and flattening tests conducted on tube ends per ASTM A450
- Packaged with protective plastic end caps and anti-rust varnish coating
Direct heavy trailer dispatch from Nagpur MIDC to Chandrapur (3 hrs), Bhilai (6 hrs), Raipur (7 hrs), and Hazira (20 hrs).
Frequently Asked Engineering & Procurement Questions
Technical answers curated directly by our senior boiler design engineers for plant heads, O&M managers, and procurement teams.
Request Technical Quote & Drawing Review
Submit your tube schedule, drawing number, or replacement bill of quantities (BOQ). Our engineering desk in Nagpur provides commercial proposals within 4 business hours.
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