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| Property | Parameter | Description |
|---|---|---|
| Product Name | High Pressure Boiler Tube | Seamless steel tube designed for high pressure boiler and superheater service |
| Material Grade | ASTM A335 P11 / P22 / P91 | Equivalent to EN 10216-2 13CrMo4-5 / 10CrMo9-10 / X10CrMoVNb9-1, GB 5310 15CrMoG / 12Cr2MoG / 12Cr1MoVG |
| Standard Compliance | ASTM A335 / ASME SA335 | Also available per EN 10216-2, JIS G3462 STBA, GB 5310 |
| Carbon (C) | 0.05 – 0.15% | Per ASTM A335 P11 specification; varies by grade |
| Manganese (Mn) | 0.30 – 0.60% | Enhances strength and hardenability |
| Chromium (Cr) | 1.00 – 9.50% | Provides oxidation and high-temperature corrosion resistance; P11: 1.00–1.50%, P91: 8.00–9.50% |
| Molybdenum (Mo) | 0.44 – 1.10% | Improves creep resistance at elevated temperatures |
| Phosphorus (P) / Sulfur (S) | ≤ 0.025% / ≤ 0.025% | Controlled to ensure weldability and toughness |
| Tensile Strength | 415 – 620 MPa | P11: ≥ 415 MPa, P22: ≥ 415 MPa, P91: ≥ 585 MPa per ASTM A335 |
| Yield Strength | 205 – 415 MPa | P11: ≥ 205 MPa, P22: ≥ 205 MPa, P91: ≥ 415 MPa per ASTM A335 |
| Elongation | ≥ 20% | Minimum elongation in 50 mm gauge length per applicable standard |
| Dimensions (OD × WT × Length) | OD: 12.7 – 914 mm, WT: 2.0 – 100 mm, L: 4 – 18 m | Custom sizes available upon request; cut-to-length service offered |
| Surface Finish | Black painted / Oiled / Varnished | Beveled or plain ends; internal surface cleaned for boiler service |
| Application | High pressure boilers, superheaters, reheaters, petrochemical heat exchangers | Suitable for service temperatures up to 600 °C depending on grade |
| Certification | ISO 9001, PED 2014/68/EU, TÜV, Lloyd's, BV | Mill test certificate EN 10204 3.1 / 3.2 supplied with each shipment |
| Testing | Hydrostatic / Eddy Current / Ultrasonic | 100% NDE per ASTM A335; flattening, flaring, and hardness tests included |
| Packaging | Bundle in hexagonal or square packing | Plastic caps on ends, steel strips bundled, wooden crates for export |
| MOQ | 1 Metric Ton | Smaller quantities negotiable for trial orders |
Initial Marking Issue Resolved — Tubes Themselves Were Fine
Ordered 10 tons of SA213 T22 tubes, OD 38.1mm x 5.1mm, for an HRSG project in Texas. The tubes met all mechanical and chemical specs per our ASME requirements. However, roughly 15% of tubes had heat number stenciling that was partially illegible on arrival, which caused a delay with our QA documentation. Kuaima responded quickly, provided supplementary traceability records within 48 hours, and offered to re-stencil at their cost on future shipments. Problem solved, but it cost us two days on site. Tube quality itself was not in question.
Ordered 10 tons of SA213 T22 tubes, OD 38.1mm x 5.1mm, for an HRSG project in Texas. The tubes met all mechanical and chemical specs per our ASME requirements. However, roughly 15% of tubes had heat number stenciling that was partially illegible on arrival, which caused a delay with our QA documentation. Kuaima responded quickly, provided supplementary traceability records within 48 hours, and offered to re-stencil at their cost on future shipments. Problem solved, but it cost us two days on site. Tube quality itself was not in question.
