SA192 Boiler Tubes — Seamless Cold-Drawn, IBR Form III-B

ASME SA-192 (and its metric twin SA-192M) is a low-carbon, seamless boiler-tube specification. Suitability must follow the approved boiler drawing, governing design code, ordered material standard and engineering review of the actual service. RP Sales handles SA-192 enquiries from Kanpur, but availability, mill route and certificate scope are confirmed against the exact OD, wall, length and quantity. Where IBR applies to the tube, the component-specific statutory document is Form III-B; the heat-wise MTC is a separate inspection record.

What ASME SA-192 actually covers

SA-192 sits inside Section II Part A of the ASME Boiler & Pressure Vessel Code as a specification for seamless carbon steel boiler tubes. Procurement should carry the exact SA-192 or SA-192M designation shown on the approved drawing rather than converting it to a different grade from a general service description. Boiler geometry, design pressure, metal temperature, heat flux, corrosion allowance and the governing code all belong in the designer's material review. Our role is to quote the ordered standard and documentation package without replacing that review with a universal selection limit.

The tube is manufactured by hot piercing a billet, then cold-drawing the resulting shell to final OD and wall thickness across one or more passes. The ordered edition, approved drawing and mill route control heat treatment, test method and surface acceptance. State the required finish and inspection evidence in the RFQ; the proposed lot and its documents must be confirmed on the order rather than inferred from a product-page description.

Chemical composition (SA-192 / SA-192M)

Mechanical properties & testing

• Tensile strength: 325 MPa (47 ksi) minimum
• Yield strength: 180 MPa (26 ksi) minimum
• Elongation: 35 % minimum in 50 mm (longitudinal strip)
• Hardness: 77 HRB maximum
• Hydrostatic test: 100 % of finished tubes, or equivalent NDT (eddy-current)
• Flattening test: ring sample from each tube end

OD & wall thickness range we supply

Use these dimensions to prepare an enquiry, then confirm the actual mill or yard lot before scheduling:

IBR Form III-B for SA192 tubes — Kanpur buyer checklist

For an IBR-controlled SA-192 tube order, write Form III-B on the enquiry and require the quotation to identify the mill lot, Inspecting Authority and heat-number linkage. Do not request Form III-C: the official forms assign III-C to boiler mountings and fittings, while III-A covers steam pipes. The statutory form and MTC must agree with the tube marks and approved drawing. Use the seamless boiler tubes in Kanpur page for local enquiry context, and read more on how we handle MTC and TPI across the order.

SA-192 vs SA-210 — when to upgrade

SA-192 and SA-210 should be compared against the approved material specification, tube schedule and design calculations for the actual boiler location. Do not upgrade or substitute a grade from a generic temperature rule. If the engineering team is reviewing alternatives, send the drawing revision, governing code, service data and required inspection documents before commercial comparison. Supporting references include our forthcoming SA192 vs SA210 comparison, our SA-210 standards page, and the broader boiler tubes catalogue page. For project-specified alloy pipe grades, also see ASTM A335 P11/P22/P91.

Buyer typology — who orders SA-192 from us

• Package boiler OEMs & service contractors — re-tubing 6 to 20 TPH boilers in sugar mills, paper mills, food and pharma plants.
• Waste-heat recovery boiler fabricators — behind diesel gensets, kilns, and process furnaces.
• Feed-water heater & deaerator builders — tube-bank enquiries where the approved drawing and code calculation specify SA-192.
• Sugar-mill & distillery maintenance teams — replacement enquiries tied to the approved tube map, current lot, inspection route and outage plan.

Confirming whether SA-192 belongs on the order

Start with the latest approved drawing and tube schedule. The material designation, dimensions, minimum-wall basis, heat-treatment condition, testing route and IBR documentation should agree across the drawing, purchase order and inspection plan. Service descriptions such as boiler bank, waterwall, economiser or superheater are not substitutes for the designer's material callout. Where those documents conflict, hold the enquiry for written engineering clarification before placing the mill order.

A substitution review should record the governing design code, ordered standard, drawing revision and responsible engineering approval. It should also confirm whether the proposed material is accepted for the specific location and fabrication route. RP Sales can compare availability, certification and mill lead time after that technical basis is clear, but we will not infer a universal service cut-off or replace the project engineer's selection.

Worked weight calculation for ASME SA-192 tubing

Procurement planning requires accurate material weights to estimate transport freight and yard handling limits. The theoretical weight of seamless carbon steel tubes is calculated using a standard volumetric formula. The weight per meter is a function of the outside diameter and the wall thickness:

Weight (kg/m) = (OD - t) × t × 0.02466

Where OD is the nominal outside diameter in millimeters, and t is the specified wall thickness in millimeters. The following calculation uses an enquiry dimension of 50.8 mm outside diameter and 3.6 mm wall thickness; it is not a stock statement:

Weight = (50.8 - 3.6) × 3.6 × 0.02466 = 47.2 × 3.6 × 0.02466 = 4.19 kg/m

For an order cut to 6.0 metres per tube, the unrounded formula gives 25.14 kg per tube after rounding. A Kanpur Dehat maintenance order for 100 tubes at that specified cut length has an estimated theoretical mass of about 2,514 kg, or 2.51 metric tons. Mill random-length supply must instead be totalled from the actual bundle lengths on the packing list before transport is booked.

Procurement checklist and RFQ specifications

Vague descriptions on purchase orders lead to delays or incorrect material dispatches. When sending an RFQ for boiler tubes, verify these five entries on the technical sheet:

• Exact Dimensions: Outside diameter in millimeters and wall thickness in millimeters. Do not specify in nominal pipe sizes.
• Wall Thickness Basis: State that the order is on a minimum-wall basis and carry the same basis into the drawing, purchase order and inspection record. Verify supplied wall measurements against the ordered requirement.
• Length Basis: State the permitted mill random-length range or the specific cut length and tolerance required by the boiler tube map.
• Certification: Heat-wise MTC and, where IBR applies to the tube, Form III-B confirmed against the approved inspection plan.
• Inspection Hold Points: Coordination for third-party inspection agencies at the mill if required by your project ITP.

Common procurement mistakes in boiler tube sourcing

In practice, sourcing departments often make two recurring errors when procuring SA-192 boiler tubes. First, buyers confuse boiler tubes with standard carbon steel pipes. A 2-inch ASTM A106 Grade B pipe has an outside diameter of 60.3 mm, whereas a 2-inch boiler tube has an outside diameter of 50.8 mm. Ordering pipe dimensions for a tube sheet designed for boiler tubes makes the material completely unusable, causing costly return freight.

Second, buyers fail to carry the minimum-wall ordering basis through the drawing, purchase order and inspection plan. An average-wall pipe description is not interchangeable with a minimum-wall boiler-tube callout. Ask the engineering team to resolve the basis before order placement, then check the mill certificate and measured wall results against the approved requirement.

Sources and standard references

The technical details on this page are compiled from primary industry specifications and regulatory standards. Sourcing engineers can verify the chemical and physical limits through these reference materials:

• ASME BPVC Section II Part A: use the controlled project edition of SA-192 / SA-192M for the ordered material requirements and acceptance criteria.
• Indian Boiler Regulations: use the applicable controlled regulations and approved inspection plan; tube certification is Form III-B, distinct from III-A steam-pipe and III-C mounting/fitting forms.

FAQ — SA-192 supply & documentation