Straight A213 T11 and T22 tubes with a defined wall and heat-treatment condition
We supply straight seamless T11 and T22 alloy tubes for boiler fabrication and planned replacement. The A213 grade, actual outside diameter, wall basis and delivery condition stay together on the material schedule. Full lengths and prepared cuts are separate order items, ready for the next fabrication operation.
| Product | Straight seamless chrome-moly boiler, superheater and heat-exchanger tube |
|---|---|
| Material specification | ASTM A213/A213M; exact grade and ordered edition |
| Grades in this page | T11 and T22 |
| Dimensions | Actual OD × wall with minimum or specified average-wall basis |
| Ends | Plain-cut or beveled to the fabrication detail |
| Delivery condition | Grade-specific manufacturing and heat-treatment condition retained in material records |
Keep the wall basis beside the selected dimension when preparing the tube schedule.
| Tube grade | Actual OD (mm) | Selected wall (mm) | Length basis (m) |
|---|---|---|---|
| T11 / T22 | 13.7 | 2.24 / 3.02 | 5.8–12 or cut |
| T11 / T22 | 21.3 | 2.77 / 3.73 | 5.8–12 or cut |
| T11 / T22 | 33.4 | 3.38 / 4.55 | 5.8–12 or cut |
| T11 / T22 | 114.3 | 6.02 / 8.56 | 5.8–12 or cut |
No matching specification. Clear the search to see every row.
Scroll sideways to see every column.
Selected OD and wall entries from our round alloy-tubular dimensional catalog provide starting dimensions for A213 T11/T22 inquiries. Each supplied combination retains its grade, minimum or specified average wall, tolerance and heat-treatment condition. The equipment design establishes the required pressure and temperature basis.
The A213 T11 composition reference specifies 1.00–1.50% chromium and 0.44–0.65% molybdenum by mass. Its UNS identity is K11597. We retain that grade and heat identity through straight-length and cut-piece orders.
T22 has higher specified chromium and molybdenum ranges: 1.90–2.60% Cr and 0.87–1.13% Mo by mass, under UNS K21590. It is a different material choice, even when the outside diameter and wall match a T11 line item.
A T11-to-T22 change needs the accepted welding and heat-treatment route for that material. The equipment specification authorizes the selected grade, and the tube certificate records the supplied heat and its material results.
A213 permits minimum-wall tubing and average wall when specified in the order. The same numerical wall value has a different acceptance basis in those two orders, so we carry that basis into the offer and inspection scope.
A scheduled replacement can use full straight lengths or a defined cut list. The original tube schedule and field measurement help separate installed length from allowance for trimming and fit-up.
A square-cut expansion end and a butt-weld bevel serve different joints. End squareness, bevel, land and any extra machining allowance follow the connection drawing.
Loose debris and temporary preservation residues can affect the next workshop operation. The order states the required internal condition and any restriction on protective oils.
This page supplies straight tube. U-bends, panel assemblies and other formed elements require their own drawings, dimensional checks and post-forming treatment scope.
A fabricator can keep T11 and T22 items separate within a mixed tube schedule. Each line carries the wall basis and material condition needed for the approved fabrication route.
Replacement purchasing starts from the equipment material schedule and the actual tube dimensions. Service exposure or deterioration may require an engineering review before copying the old grade into a new order.
Inspection uses the purchased minimum or average wall and its applicable tolerance. Wall readings are evaluated against that ordered tube basis, with the selected dimension retained in the inspection record.
Actual OD, finished length and the specified straightness requirements affect tube-sheet fit and fabrication. End damage and ovality are checked before packing.
Heat identity connects the delivered tube with its chemical, mechanical and delivery-condition records. Required heat-treatment documentation is included in the agreed release package.
A213 examinations and any supplementary tests follow the ordered grade and specification. Additional witnessing, nondestructive testing or special acceptance criteria are identified in the inspection plan.
End protection keeps debris away from clean bores, while suitable supports limit handling damage to thin tube ends. The temporary preservation treatment matches the receiving fabrication requirements.
T11 and T22, different dimensions and different heats remain identifiable in separate bundles or clearly segregated groups. Cut pieces retain the link to their original material records.
Our quotation separates the defined tube combination from cutting, end work and additional inspection. Piece count, supplied length, packing and destination terms describe the same release scope.
An accepted substitution compares A335 P11 pipe with the required A213 T11 tube specification, including product form, dimensional tolerances, wall basis and tests. The equipment specification and responsible engineering approval govern that change.
A213 specifies a hydrostatic test or a nondestructive electric test for each tube. An order requiring both, a particular method or witnessing identifies that requirement separately. The agreed test records state the actual method and acceptance basis.
XRF checks chromium and molybdenum to help distinguish the alloy families. Tube acceptance also reviews the heat-linked treatment condition, mechanical properties and completed product tests, with any specified PMI results included in that record set.
A grade change requires engineering approval of the alloy chemistry, delivery condition, welding route and actual service requirements. We retain the approved T11 or T22 designation alongside the specified OD and wall.
Yes. Supply the cut list with grade, OD, wall basis, finished length, piece count and end details. The quotation returns the agreed cut scope with the production and shipping schedule for the required delivery date.
The material certificate identifies the supplied heat and recorded test results. A remaining-life assessment combines that information with operating history, temperature, stress and observed degradation under the applicable engineering method.
Other items in the same product category.
We wrote these for buyers specifying and receiving exactly this kind of package.
Send the A213 grade, actual OD, wall and its basis, lengths, quantity and end detail. Include the required delivery condition, inspection documents and destination. Our offer keeps tube supply, preparation and additional examination as defined line items.