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Durable Alloy Steel Seamless Boiler Tube 52'' For High Temperature Service
Since 2008, TIPTOP has been supplying seamless high pressure boiler pipes, with OD up to 56'' 1422mm and wall thickness up to 140mm. TIPTOP is your trusted partner for large OD & heavy wall thickness seamless pipes.
1. Available Size Range:
| OD | Thickness | ||
| mm | inch | mm | SCH |
| 88.9~1422 | 3''~ 56'' | 2.11~140 | ≥SCH10 |
| *If the steel grades and size you are looking for are not listed above, please contact us for further information. | |||
2. Standards
ASTM A106 ——Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A335 ——Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
3. Application
For the high-pressure boiler and steam pipes, and the petrochemical industry pipes;
Power plant; Chemical Fertilizer; Petrochemicals; Offshore Oils; Gas Productions; Refineries and etc.
4. Steel pipes No. of main production:
ASTM A335 Grade P5, P9, P11, P12, P22, P91, P92
ASTM A106 Grade B, C
5. Dimensional Tolerance
| Pipe types | OD (mm) | Tolerance | WT (mm) | Tolerance |
| High Pressure Boiler Tube | 219~457 | ±1.0％ | ≤20 | -10% ~ +12.5% |
| 20~40 | -10% +10% | |||
| 457~1422 | ±0.9％ | ＞40~70 | -7％, +9％ | |
| ＞70~20 | -6％, +8％ |
6. Chemical Composition:
| High Pressure Boiler Tube Chemical Requirements | ||||||||||||
| Standard | Grade | UNS Designation | Composition, % | |||||||||
| C | Mn | P | S | Si | Cr | Mo | Ni | V | Others | |||
| ASTM A335 | P5 | K41545 | 0.15max | 0.30-0.60 | 0.025 | 0.025 | 0.50max | 4.00-6.00 | 0.45-0.65 | ... | ||
| P9 | S50400 | 0.15max | 0.30-0.60 | 0.025 | 0.025 | 0.25-1.00 | 8.00-10.00 | 0.90-1.10 | ... | |||
| P11 | K11597 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 | ... | |||
| P12 | K11562 | 0.05-0.15 | 0.30-0.61 | 0.025 | 0.025 | 0.50 max | 0.80-1.25 | 0.44-0.65 | ... | |||
| P22 | K21590 | 0.05-0.15 | 0.30-0.60 | 0.025 | 0.025 | 0.50 max | 1.90-2.60 | 0.87-1.13 | ... | |||
| P91 | K91560 | 0.08-0.12 | 0.30-0.60 | 0.02 | 0.01 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 | 0.4 | 0.18-0.25 | N 0.030-0.070 | |
| Al 0.02max | ||||||||||||
| Cb 0.06-0.10 | ||||||||||||
| Ti 0.01 max | ||||||||||||
| Zr 0.01max | ||||||||||||
| P92 | K92460 | 0.07-0.13 | 0.30-0.60 | 0.02 | 0.01 | 0.50 max | 8.50-9.50 | 0.30-0.60 | 0.4 | 0.15-0.25 | N 0.03-0.07 | |
| Al 0.02 max | ||||||||||||
| Cb 0.04-0.09 | ||||||||||||
| W 1.5-2.00 | ||||||||||||
| B 0.001-0.006 | ||||||||||||
| Ti 0.01 max | ||||||||||||
| Zr 0.01 max | ||||||||||||
| ASTM A106 | Grade B | 0.3 | 0.29–1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.15 | 0.4 | 0.08 | ||
| Grade C | 0.35 | 0.29–1.06 | 0.035 | 0.035 | 0.1 | 0.4 | 0.15 | 0.4 | 0.08 | |||
7. Mechanical Properties
| Standards | Steel pipes No. | Tensile strength | Yield strength | Elongation | Impact energy | Hardness |
| (Mpa) | (Mpa) | (%) | (J) | |||
| ASTM A335 | P5 | ≥415 | ≥205 | ≥22 | ≥35 | ≤187HB |
| P9 | ≥415 | ≥205 | ≥22 | ≥35 | ||
| P11 | ≥415 | ≥205 | ≥22 | ≥35 | ≤163HB | |
| P12 | ≥415 | ≥220 | ≥22 | ≥35 | ≤163HB | |
| P22 | ≥415 | ≥205 | ≥22 | ≥35 | ≤163HB | |
| P91 | 585～760 | ≥415 | ≥20 | ≥35 | ≤250HB | |
| P92 | ≥620 | ≥440 | ≥20 | ≥35 | ≤250HB | |
| ASTM A106 | Grade B | ≥415 | ≥240 | ≥22 | ≥35 | / |
| Grade C | ≥485 | ≥275 | ≥20 | ≥35 | / |
