Seamless carbon pipe for specified plant and steam-line orders
A106 Grade B seamless pipe covers our published NPS 1/2–24 range for plant pipework and fabrication. Wall thickness, delivery condition and end preparation follow the material requisition. Grade C is quoted as a separate material request.
Two published Grade B size/wall selections are listed below. The linked Baolai fire-pipe catalog, PDF page 11, right-hand printed page 22, contains the wider A106 Grade B panel. Grade C and other wall requests retain their separately quoted scope.
| Order item | Published or reviewed scope | Purchase detail |
|---|---|---|
| Grade B pipe | A106 seamless carbon pipe, NPS 1/2–24 | Required edition, grade and line quantities |
| Wall selection | Selected Grade B Sch 40/80 dimensions below; other specified-wall inquiries | NPS/schedule or OD/wall, unit system and acceptance basis |
| Grade B — NPS 1/2 | Nominal OD 21.3 mm | Nominal wall: Sch 40, 2.77 mm / Sch 80, 3.73 mm |
| Grade B — NPS 6 | Nominal OD 168.3 mm | Nominal wall: Sch 40, 7.11 mm / Sch 80, 10.97 mm |
| Delivered condition | Hot-finished pipe; cold-drawn requests reviewed separately | Required final condition and any specified treatment record |
| Lengths | 6 m, 12 m or specified cut pieces | Actual length, piece count and length tolerance |
| Ends | Plain or beveled; thread/groove requests to joint detail | Prepared end, mating connection and quantity |
| Grade C request | Separately reviewed dimensions and delivery requirements | Grade C requisition and applicable material records |
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We review nominal-schedule and minimum-wall requirements on their stated acceptance basis. A106/A106M-26 is the cited reference; the order identifies the edition and additions required by your project.
Grade B and Grade C have different strength minima and carbon limits. The table gives selected material references; Grade C supply is reviewed separately against the required dimensions and condition.
| Grade | Carbon maximum (%) | Silicon minimum (%) | Minimum yield (psi / MPa) | Minimum tensile (psi / MPa) |
|---|---|---|---|---|
| B | 0.30 | 0.10 | 35,000 / 240 | 60,000 / 415 |
| C | 0.35 | 0.10 | 40,000 / 275 | 70,000 / 485 |
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Carbon is a maximum and silicon is a minimum in this selection. The published psi and MPa values retain their independent unit bases. Actual chemistry and mechanical results are checked against the ordered specification and grade; these selected references are neither a complete chemistry table nor the allowable stress or pressure rating for an operating line.
Hot-finished pipe is quoted with its required final delivery condition. A separate normalizing treatment is identified when it is part of the specified supply.
Cold-drawn supply identifies the final condition after drawing, with the required treatment record and any project-specific material requirements.
We price cut pieces by finished length, tolerance and count. Material references are retained through preparation, with any facing or machining allowance included in the specified blank length.
Plain or beveled ends follow the required joint detail, including the root face where specified. Threaded and grooved requests are reviewed separately for their mating connection and pipe dimensions.
The delivered pipe’s treatment record covers its supplied condition. Any post-weld heat treatment applies later to the fabricator’s welded assembly, under that joint procedure and project specification. Our offer identifies the straight pipe and end work being supplied; fabrication of a complete pressure spool has its own scope.
Temporary oil or protective treatment is selected for handling and storage. Cleaning and later coating requirements are retained in the finish scope, separately from the installed service coating.
Required bore cleaning, inspection and end closure are included alongside the outside protection. The pipe is quoted for the internal condition specified at receipt.
Bevels and specified end bands retain their required preparation. Preservation identifies the treated areas and any cleaning needed before welding, with end protection for handling.
ASME SA-106 requests are reviewed against the named code edition and required material records. The quotation retains that code-material requirement separately from an ordinary ASTM A106 purchase.
A dual-standard request identifies each specification and edition. The offered pipe needs records covering the required combination, including its manufacturing route and delivery condition.
The material report links the supplied heat or lot to its grade and test results. Grade B and Grade C use their own acceptance requirements, including correctly directed chemical limits. The report’s actual values are reviewed in the specified unit system rather than replaced by catalog minima.
Required manufacturing or treatment records identify the condition of the delivered pipe. The material and processed-piece references connect those records to the ordered lengths. Additional final-treatment requirements remain distinguishable from the base material results in that document package.
Dimensional records use the required diameter, wall and length acceptance basis. Pipe-body test or examination records follow the applicable requirement for the selected material order. Any supplemental test method, extent or acceptance record is identified with that scope before release.
Project inspection notes are reviewed before production. The agreed plan identifies document checks, witness points and the party responsible for dispatch release.
An order for fixed lengths states the finished length and piece count. An agreed variable-length order states its permitted length basis and quantity unit. Our offer keeps that distinction visible when comparing weight, linear-length or piece pricing, with the purchased preparation identified on each line.
Bundles identify grade, size, length group and material reference. Grade B, Grade C and different delivery conditions have distinct packing entries, with the agreed supports and end protection.
Our quotation separates the specified pipe, preparation, preservation and required inspection work. It identifies the production schedule, packing and shipment terms for the stated destination. Delivery priorities use the material-line groups agreed with your receiving and fabrication teams.
Attach the relevant class page or material note with the affected pipe lines. The class number alone may not carry the grade, wall basis, delivery condition or added inspection requirements to the supplier. That reference gives the quotation the same material scope as your project list.
Yes. Fittings and flanges are separate lines with their own specification, grade, dimensions and applicable pressure class. We review them alongside the A106 pipe for the stated connection requirements.
Send the revised document with its revision and the affected lines. We reconcile changes to grade, wall, condition, preparation or inspection scope with the quoted quantities and price. The accepted revised scope then establishes the material and processing requirements released for that order.
A higher strength minimum does not approve a different pipe wall. The project design and material specification select the grade and thickness together; any change needs that approval.
No. The delivery-condition and treatment records identify the material after drawing. Surface appearance alone does not establish that final condition.
They are different acceptance descriptions. A minimum-wall purchase states its required basis; a schedule designation identifies nominal dimensions and retains the tolerances of the ordered pipe specification.
Attach the requisition and any referenced pipe-class notes, with line quantities and destination. Include the required edition, grade, size and wall basis, delivery condition, lengths, prepared ends and added inspection requirements. For an initial inquiry, send the A106 Grade B lines you already have. We return itemized material and preparation prices with the proposed condition, record package, quantity basis, packing and shipment terms.