About Boiler Tubes
Seamless and welded carbon- and alloy-steel boiler-tube options. Tell us the governing material standard, grade, dimensions, design conditions, inspection, and any applicable IBR Form III-B scope.
Use this page as a product and specification reference. The quotation must state the exact material grade, dimensions, manufacturer, certification or document scope, inspection, quantity, price, current availability, freight, and proposed delivery timing for the specific RFQ.
Specification reference
| Outer Diameter (OD) | State the tube OD from the approved drawing; do not order boiler tube by a generic pipe NB range. |
|---|---|
| Wall Thickness (WT) | State minimum or nominal wall basis, tolerance, corrosion allowance, and drawing requirement. |
| Grades | SA179, SA192, SA210 Gr. A1/C, SA213 Gr. T11/T12/T22 |
| Lengths | Single Random (SRL), Double Random (DRL), or custom cut |
| Finish | Black painted, anti-rust oiled, bare |
Confirm the exact grade, dimensions, tolerance, test certificate, and current availability for your requirement before ordering.
Common applications
These are enquiry contexts, not universal approvals. The project design and governing specification must approve the exact product, grade, dimensions, and service conditions.
- Power Generation: Superheaters, reheaters, and water walls in thermal plants.
- Petrochemical: Heat exchangers and process heating elements.
- Sugar Mills: Bagasse-fired boilers and evaporation units.
- Paper & Pulp: Steam distribution and recovery boiler systems.
Potential source references
The quotation must identify the proposed manufacturer, current availability, inspection documents, and delivery basis for the specific RFQ.
- Maharashtra Seamless Limited (MSL)
- Jindal Saw Ltd
- ISMT Limited
- Tenaris
Applicable standards and specifications
Technical Definition, Service Conditions, and Governing Codes
Boiler tubes are seamless or welded tubular products ordered for heat-transfer duty in boiler banks, water walls, superheaters, economisers, and heat exchangers. They are specified by outside diameter and wall thickness rather than by relying only on a nominal pipe description. A purchase order should reproduce the equipment drawing terminology so that tube sheets, bends, headers, and replacement pieces match at site.
The quotation should identify the proposed mill and grade for the RFQ rather than implying that every listed source is currently available. Documentation is tied to the order: request the mill test certificate, heat-wise traceability, third-party inspection, and the component-specific IBR document when the project or applicable regulation calls for them. The official forms index assigns Form III-B to tubes; the offer should state which documents are included before material is released.
Grade Selection Matrix: Who It Is For and Who Should NOT Use It
Grade selection belongs to the boiler designer or the approved equipment drawing. The RFQ should name the material specification and grade exactly, then state whether the tube is for a boiler bank, water wall, economiser, superheater, reheater, or heat exchanger. Design pressure, design temperature, corrosion allowance, forming work, welding procedure, and expected inspection all affect that selection. A universal service limit for SA192, SA210, or SA213 is not a safe substitute for the governing design code and drawing.
General plumbing, scaffolding, structural frames, and ordinary water distribution use different product standards and acceptance criteria. Buyers should not upgrade or substitute a boiler grade by description alone. If the drawing is incomplete, pause the enquiry and obtain a written material confirmation from the designer before asking a mill or stockist to quote.
Technical Sizing and Sizing Weight Data Table
Repository outside-diameter, wall, and calculated-mass rows for preliminary boiler-tube takeoffs. Final grade, wall basis, tolerances, and service selection follow the approved specification and drawing.
| OD (mm) | Wall Thickness (mm) | Calculated Weight (kg/m) |
|---|---|---|
| 31.8 | 3.2 | 2.26 |
| 38.1 | 3.2 | 2.75 |
| 44.5 | 3.6 | 3.63 |
| 50.8 | 3.6 | 4.19 |
| 63.5 | 4.0 | 5.87 |
| 76.2 | 4.5 | 7.96 |
These outside-diameter and wall combinations mirror the boiler-tube size rows in the RP Sales repository. Calculated weights are planning values; confirm the ordered minimum wall, length tolerance, and mill mass basis on the quotation.
Worked Sizing and Sizing Weight Calculation
For a practical material takeoff, consider a boiler service company in Kanpur preparing a boiler-bank replacement order for a sugar mill in Kanpur Dehat. The approved drawing calls for 250 tubes at 50.8 mm OD with a 3.6 mm wall, each 6.0 metres long. The grade remains whatever the approved drawing and material specification require; this example calculates mass only.
First, the engineer computes the unit weight per meter of the tube using the standard formula:
Weight (kg/m) = (OD - t) * t * 0.02466
Input values: OD = 50.8 mm, t = 3.6 mm
Calculation: Weight = (50.8 - 3.6) * 3.6 * 0.02466 = 47.2 * 3.6 * 0.02466 = 169.92 * 0.02466 = 4.1902 kg/m (rounded to 4.19 kg/m).
Next, the total length required for the BOQ is calculated:
Total Length = 250 tubes * 6.0 meters/tube = 1,500 meters.
Finally, the total weight of the load is computed:
Total Weight = 1,500 meters * 4.1902 kg/m = 6,285.3 kg (or approximately 6.29 Metric Tons).
Use the result as a planning quantity, then reconcile it with the mill's theoretical or actual mass basis, bundle count, packing method, and vehicle payload before issuing the purchase order.
Common Procurement Mistakes and Failure Modes in Practice
Boiler-tube enquiries can become ambiguous when the purchase description cannot be matched to the drawing, inspection plan, or replacement material:
- Pipe and tube terminology: Quote the outside diameter and wall exactly as shown on the drawing. A nominal pipe description may identify a different outside diameter and can delay fit-up at the header or tube sheet.
- Document scope left until dispatch: State whether Form III-B for tubes, an MTC, heat-wise marking, or third-party inspection is required in the enquiry. The seller can then confirm availability and inspection timing before accepting the order.
- Minimum wall versus nominal wall: Copy the tolerance basis from the material specification. Do not let an informal market description replace the acceptance language on the drawing.
- Replacement samples without identity: Record the removed tube's markings, measured dimensions, orientation, and service location. Share photographs and the equipment drawing so the proposed replacement can be checked before cutting.
Kanpur Steel Market Pricing Mechanics & Regional Delivery Basis
Boiler tubes are commonly quoted by mass, length, or piece depending on the size, source, and cutting requirement. Ask the quotation to separate material, cutting, inspection, packing, freight, and taxes. This makes two offers easier to compare when one is ex-warehouse Kanpur and another is a mill dispatch.
For Kanpur, Panki, Dada Nagar, Fazalganj, Jajmau, Unnao, or a longer route to another city, provide the delivery PIN code, access window, unloading method, and maximum vehicle size. Require the quotation to state current availability, proposed loading date, transport responsibility, and any estimated transit basis; the catalogue makes no standing corridor promise.
Agree the dispatch pack in writing. Depending on the order, it may include the invoice, e-way bill, packing list, mill test certificate, heat list, inspection release note, and Form III-B for tubes when ordered and applicable. The consignee should nominate one person to check seals, bundles, markings, and document references before unloading.
Standards and Regulatory Compliance
The purchase specification should identify the governing material standard, edition, grade, manufacturing route, heat treatment, dimensional tolerance, test route, and acceptance documents. Service selection remains with the design code and approved equipment drawing. Ask the mill or stockist to mark any proposed deviation on the quotation rather than treating a nearby grade or wall as equivalent.
Key Takeaways for Kanpur Boiler Tube Buyers
Procurement and engineering tips for local contractors and project managers sourcing boiler tubes in Uttar Pradesh:
- Source confirmation: The quotation identifies the proposed mill from the supplier list for the grade and size being offered.
- Applicable documents: For a tube item, request Form III-B at enquiry stage when the project requires it; the offer should confirm whether it applies and how it will be supplied. Form III-C belongs to boiler mountings and fittings.
- Dimensional checks: Put outside diameter, minimum or nominal wall basis, length tolerance, end condition, and marking in the purchase description.
- Dispatch planning: Share the Kanpur-area or outstation delivery point, site access, and unloading plan so timing can be confirmed against actual stock and carrier availability.
Inspection handoff before boiler-tube dispatch
Create a short inspection sheet that follows the order from quotation to receipt. Start with the drawing number and revision, then list the ordered grade, outside diameter, wall basis, length, end condition, quantity unit, and document set. The receiving team in Kanpur or at the project site should use the same sheet, which prevents a verbal clarification from disappearing between purchase, stores, and maintenance.
Before release, compare the quotation, purchase order, mill certificate, heat list, and bundle tags. Heat references should remain readable after handling. If cutting or rebundling is planned, agree how identity will be transferred to the cut pieces. Record dents, bent ends, corrosion, damaged caps, mixed markings, or wet documents before the carrier leaves.
For shutdown work, separate confirmed stock from material that still needs inspection or documentation. Confirm the cut plan only after the maintenance team checks the final field lengths. Keep spare pieces identifiable rather than mixing them with general tube stock, and record where each accepted bundle will be used.
Before installation starts, maintenance should reconcile tube quantity with the replacement map and reserve material for bends, trials, and damaged ends under the project's own allowance. Check tube-sheet holes, tooling, cleaning method, and storage racks before opening bundles. If existing equipment measurements differ from the drawing, raise the difference to the designer rather than changing the ordered wall or grade at site.
Close the order with a document index that ties accepted bundles, certificates, inspection notes, and nonconformance records to the equipment. This is especially useful when a Kanpur buyer splits one purchase between a planned outage and future maintenance stock. The unused balance should retain markings, end protection, and a readable storage location so it can be identified later.
What to include in the RFQ
- Specify the relevant standard or grade where known.
- Provide OD or NB, wall thickness or schedule, required length, and quantity.
- State the delivery city or PIN code and any unloading constraints.
- List MTC, IBR, TPI, marking, inspection, or other documentation requirements.