ASME SA192 is a lower-carbon seamless tube for stationary boiler banks, while SA210 covers higher-strength Grade A1 and Grade C material for boiler and superheater duty. The grade on the approved drawing controls because the materials are not interchangeable. For a Kanpur buyer, fix that grade with the tube OD, minimum wall and documentation requirement before matching the enquiry to the Kanpur steel-pipe range.
SA192 vs SA210 Gr A1 vs Gr C — Kanpur buyer comparison
| Attribute | SA192 | SA210 Gr A1 | SA210 Gr C |
|---|---|---|---|
| Chemistry level | Lower-carbon specification | Medium-carbon Grade A1 requirements | Grade C requirements |
| Mechanical requirement | Base boiler-tube grade | Higher than SA192 | Higher than Grade A1 |
| Numeric acceptance values | Check purchased edition and MTC | Check purchased edition and MTC | Check purchased edition and MTC |
| Design limits | Use code allowable stress and approved calculation | Use code allowable stress and approved calculation | Use code allowable stress and approved calculation |
| Application | As stated on approved tube schedule | As stated on approved tube schedule | As stated on approved tube schedule |
| IBR tube form | Confirm applicable Form III-B | Confirm applicable Form III-B | Confirm applicable Form III-B |
| May 2026 band at 50.8 × 3.6 mm | Baseline | +10.9-12.4% over SA192 | +26.6-26.7% over SA192 |
| Availability | Confirm heat, mill and documents on quote | Confirm heat, mill and documents on quote | Confirm heat, mill and documents on quote |
When to choose SA192
Choose SA192 when the approved boiler drawing and tube schedule call for it. Confirm the specification edition, outside diameter, minimum-wall basis, calculated tube-metal temperature, allowable stress and fabrication procedure before purchase. A duty label such as waterwall, economiser or generating bank is useful context, but it does not prove that SA192 is acceptable without the designer's calculation.
When to choose SA210 Gr A1 or Gr C
Choose SA210 Grade A1 or Grade C only when that exact grade appears on the approved drawing or a formally approved material revision. The designer must use the governing code edition and actual design inputs rather than a generic service-temperature band. Where IBR applies, put the applicable Form III-B, mill approval and inspection scope on the enquiry; the quotation should state document and timing terms for that order.
IBR Form III-B — what to verify for boiler tube
The Indian Boiler Regulations use Form III-B for tubes; Form III-A is for steam pipes and Form III-C is for boiler mountings or fittings. For an IBR-regulated tube order, state the required form, registered-mill details, Inspecting Authority scope and heat traceability on the PO. Before dispatch, obtain the order-specific document list and confirm how originals or authenticated copies will travel with the consignment. At receipt, match each documented heat number to the tube marking and the MTC. See our SA192 standard page, SA210 standard page and IBR overview.
Why grade substitution fails inspection
Boiler drawings reference a specific grade because the design calculation depends on material properties and allowable stress under the governing code. SA192 and SA210 can look similar at receipt, so appearance cannot authorize substitution. The reviewer should compare the PO, approved tube schedule, Form III-B where applicable, heat-wise MTC and physical marking; any mismatch needs formal engineering disposition before the material is released.
Who should specify SA192, and who should step up to SA210
SA192 can be considered where the approved tube schedule names it and the governing calculation accepts it for the actual boiler duty. For a Kanpur enquiry, send the drawing reference, code edition, OD, minimum wall, length, quantity and fabrication scope. The quotation should identify the proposed mill heat, inspection documents and order-specific availability rather than relying on a generic stock statement.
Use SA210 Grade A1 or Grade C when the approved design names that grade. Do not select a grade solely from a “higher heat flux” label or substitute one SA210 grade for another without checking the purchased specification and code calculation. Ask the current quotation to state mill, inspection stage, documentation, delivery basis and required-date feasibility; those terms vary by heat and order.
Do not transfer a boiler-tube grade to a different coil or piping service merely because dimensions look similar. First establish the governing product specification and design code. Likewise, do not substitute SA192 where the drawing calls SA210, or one SA210 grade for another, without a documented engineering revision and corresponding document review.
Worked example: weight and cost of a 50.8 mm tube bank
Take a generating bank of 100 tubes, 50.8 mm OD by 3.6 mm wall, 6 metres each. The site weight formula gives W = (50.8 − 3.6) × 3.6 × 0.02466 = 4.19 kg per metre. Total length is 600 metres, so the quoted and priced quantity below is about 2,514 kg, or 2.51 MT.
A dated May 2026 planning snapshot listed Rs 105 to Rs 128 per kg ex-warehouse Kanpur for this SA192 example and Rs 118 to Rs 142 per kg for the matching SA210 Grade A1 example. Applied to 2,514 kg, those archived bands produce Rs 2.64 lakh to Rs 3.22 lakh and Rs 2.97 lakh to Rs 3.57 lakh respectively, before the tax and transport stated on a current quotation. The endpoint difference was about Rs 33,000 to Rs 35,000, or 10.9 to 12.4 percent, in that dated snapshot only. It is not a current price, fixed tax treatment, or general grade premium; obtain like-for-like offers for the exact wall, mill, documents and delivery basis.
RFQ checklist: what to send with a boiler-tube enquiry
A complete enquiry provides enough information for a technically comparable offer. Send these eight lines and resolve document requirements before purchase.
- Grade: SA192 or SA210 Gr A1 / Gr C, exactly as drawn on the boiler GA.
- Size: OD and minimum wall in mm, plus length per piece in metres.
- Quantity: number of lengths and total MT on the quotation's stated theoretical or actual-weight basis.
- Certification: applicable IBR Form III-B and Inspecting Authority scope, plus the inspection-document type required by the PO.
- Fabrication: straight or bent supply, end finish, and bend radius where tubes are shop-formed.
- Inspection: TPI scope and hold points, and whether the TPI charge sits with buyer or supplier.
- Packing: mill packing or export packing, end caps, and heat-number tagging per bundle.
- Delivery basis and destination, with the required site date so the IBR slot can be booked.
Common mistakes and inspection points in boiler-tube procurement
Common procurement failures include a grade that differs from the approved tube schedule, the wrong IBR component form, heat numbers that do not match the MTC, and purchase quantities raised on a different weight basis from the quotation. Resolve the required-date feasibility and inspection sequence in the order acknowledgement instead of assuming a standard IBR-slot duration.
At receipt, check the Form III-B where applicable and the order-specific inspection documents, then match every heat number marked on the tubes against the MTC. Follow the project sampling plan for OD, wall and visual inspection rather than inventing an acceptance sample. Record bore condition and end damage before signing the GRN, and store tubes under the preservation method stated by the project or manufacturer.
Standards and compliance
SA192 and SA210 sit in ASME Boiler and Pressure Vessel Code Section II Part A, which adopts the ASTM specifications as SA-192/SA-192M and SA-210/SA-210M. The linked public ASTM abstracts identify scope and grade families; numeric acceptance values must be checked against the applicable purchased edition and heat-wise MTC. In India, the official regulations identify Form III-B for tube material, while the precise IBR applicability and Inspecting Authority scope must be established for the component and order. EN 10204 document type is a purchaser requirement, not an automatic consequence of naming a boiler-tube grade.
Key points
- SA192 is the lower-carbon option for boiler banks whose approved design remains within that grade's allowable-stress envelope.
- SA210 Gr A1 and Gr C provide successively stronger grade options where the boiler drawing and stress calculation require them.
- The grades are not interchangeable; any substitution needs a documented design review and revised approval.
- For IBR-regulated tube, confirm Form III-B, inspection scope and heat traceability on the specific order.
- The displayed 10.9 to 12.4 percent difference belongs only to the archived May 2026 50.8 mm × 3.6 mm snapshot; obtain current like-for-like quotations.
FAQ — SA192 vs SA210 procurement
Both are seamless carbon-steel boiler tube specifications under ASME Section II Part A, but SA192 is the lower-carbon material intended for stationary boiler tube banks, while SA210 covers higher-strength medium-carbon grades for boiler and superheater duty. Grade A1 and Grade C carry progressively higher mechanical requirements. The grade on the approved boiler drawing controls, so the materials are not interchangeable.
When the approved boiler drawing and governing design calculation call for an SA210 grade. The decision must use the adopted code edition, calculated tube-metal temperature, allowable stress, wall basis, corrosion or wastage allowance and fabrication requirements. A service label such as waterwall or superheater is not a universal grade rule. For IBR-regulated tube, confirm the applicable Form III-B and inspection scope.
SA192 uses a lower-carbon chemistry than the medium-carbon SA210 family, while SA210 Grade C permits a stronger chemistry and mechanical envelope than Grade A1. Public ASTM abstracts identify the materials and grade families but do not print the numeric acceptance limits. Check every chemistry and tensile value against the applicable purchased standard edition and the heat-wise MTC.
No. SA192 and the SA210 grades are distinct specifications, not a quality ladder that permits automatic upgrading or downgrading. Use the exact grade on the approved drawing unless the boiler designer formally revises the material selection. Welding procedure, heat treatment, allowable stress and inspection requirements must be checked for the ordered material and governing code edition.
Where IBR applies, specify the tube grade, applicable Form III-B, mill approval, Inspecting Authority scope and required inspection document on the enquiry. Availability, document originals, counter-signature requirements and dispatch timing must be confirmed for the named mill heat and purchase order; they are not implied by the grade alone.
Related pages
- Boiler tube price list: SA192 / SA210 bands, May 2026
- SA192 boiler tube product page
- SA192 standard reference
- SA210 standard reference
- IBR Indian Boiler Regulations
- Seamless boiler tubes in Kanpur
- Sugar mill boiler tubes
- Quality, MTC & TPI
- Request a quote
Sources and references
- ASTM A192/A192M: Standard Specification for Seamless Carbon Steel Boiler Tubes for High-Pressure Service, ASTM International. Public abstract on store.astm.org (HTTP 200, retrieved 3 Sep 2026; no numeric chemistry or tensile limits shown).
- ASTM A210/A210M: Standard Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes, ASTM International. Public abstract on store.astm.org (HTTP 200, retrieved 3 Sep 2026; no numeric tensile limits shown).
- ASME BPVC Section II Part A: Ferrous Material Specifications (home of SA-192 and SA-210), American Society of Mechanical Engineers. ASME Codes and Standards (verified 2 Sep 2026).
- Indian Boiler Regulations, 1950: component-specific material forms including Form III-A for steam pipes, Form III-B for tubes and Form III-C for boiler mountings or fittings. Official forms PDF on dpiit.gov.in (verified 3 Sep 2026).
- EN 10204:2004: Metallic products, types of inspection documents, European Committee for Standardization. cen.eu (site registry citation).
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