Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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Alloy Steel Seamless Pipe ,ASTM A335/ ASME SA335 P9 , Fire Furance Pipe, Steam Furnace Tube
| ASTM A335 Alloy Steel Seamless Pipes ASTM A335 GR P5 | GR P9 | GR P11 | GR P22 | GR P91. Alloy Steel Seamless Pipes (IBR APPROVED & NACE APPROVED) ASTM A335 PIPES | ASTM A335 GR P5 PIPES | ASTM A335 GR P9 PIPES | ASTM A335 GR P11 PIPES | ASTM A335 GR P22 PIPES | ASTM A335 GR P91 PIPES Size Range: 1/8" - 26" |  |
Alloy Steel Seamless Pipes (ASME SA335 Grade P5)
Alloy Steel Seamless Pipes (ASME SA335 Grade P5) offered by us are made available in ASME SA335 as well as P1, P5, P9, P11, P12, P91 grades. Our expertise lies in offering these in different sizes & schedules, with IBR & latest edition NACE MR 0175 reports.
ASME Alloy Steel Seamless Tubes / Pipes (SA335 Grade P9)
ASME Alloy Steel Seamless Tubes / Pipes (SA335 Grade P9) manufactured, supplied and exported by us are used for various industrial applications. Our specialization in offering precision engineered alloy steels allow us to deliver these for various engineering applications in various grades like A-387 GR. P1, P5, P9, P11, P12, P22, P91, ASTM A-335 and others.
Alloy Steel Pipes (ASTM A335 P11)
Alloy Steel Pipes (ASTM A335 P11) offered by us are made as per IBR standards and are used mainly for boiler operations. We source these seamless pipes in varied size range. Further, we can also get these customized as per boiler piping requirements. For ensuring in them optimum quality standards, we source these from quality manufacturers. We also offer clients of having their own mark on them.
Alloy Steel Pipes (ASTM A335 P12)
Alloy Steel Pipes (ASTM A335 P12) offered by us are available with ASTM A335 P12 standard and finds application in industries like Petrochemicals, Refineries, Fertilizers, Pharmaceuticals and others. We can source these seamless pipes in size range of up to 26 inches.
Alloy Seamless Pipes (ASTM A335 Grade P91 NACE)
Alloy Seamless Pipes (ASTM A335 Grade P91 NACE) offered by us are made available in ASTM A335 Grades. Made as per IBR standards, these are mainly used in boiler operations. Further, our expertise lies in offering these pipes in various size range as well as in customized parameters as per boiler piping requirements. Sourced from quality conscious manufacturers, we also offer our clients the option of adding their own mark on them.
Alloy Steel Tubes (ASME SA213 Grade T11)
Alloy Steel Tubes (ASME SA213 Grade T11) manufactured and supplied by us are of ASME SA213 Grade. Our expertise lies in offering these in various sizes as well as other specifications as per the required demands. These Alloy Steel Tubes find usage mainly in different industrial applications.
Heat Treatement Requirement
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| P5, P9, P11, and P22 |
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| Grade | Heat Treatment Type | Normalizing Temperature Range F [C] | Subcritical Annealing |
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| P5 (b,c) | Full or Isothermal Anneal |
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| Normalize and Temper | ***** | 1250 [675] | |
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| Subcritical Anneal (P5c only) | ***** | 1325 - 1375 [715 - 745] | |
| P9 | Full or Isothermal Anneal |
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| Normalize and Temper | ***** | 1250 [675] | |
| P11 | Full or Isothermal Anneal |
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| Normalize and Temper | ***** | 1200 [650] | |
| P22 | Full or Isothermal Anneal |
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| Normalize and Temper | ***** | 1250 [675] | |
| P91 | Normalize and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] | |
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| Quench and Temper | 1900-1975 [1040 - 1080] | 1350-1470 [730 - 800] | |
Chemical Requirements
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| Grade | P-5 | P-9 | P-11 | P-22 | P-91 | P-91 shall also include the following: |
| Element | UNS Designation | K41545 | S50400 | K11597 | K21590 | K91560 | ||
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| Carbon | 0.15 max | 0.15 max | 0.05 - 0.15 | 0.05 - 0.15 | 0.08 - 0.12 | V at 0.18 - 0.25 | |
| Manganese | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | 0.30 - 0.60 | N at 0.030 - 0.070 | ||
| Phosphorous, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.020 | Ni at 0.40 max | ||
| Sulfur, max | 0.025 | 0.025 | 0.025 | 0.025 | 0.010 | Al at 0.02 max | ||
| Silicon | 0.50 max | 0.25 - 1.00 | 0.50 - 1.00 | 0.50 max | 0.20 -0.50 | Cb at 0.06 - 0.10 | ||
| Chromium | 4.00 - 6.00 | 8.00 - 10.00 | 1.00 - 1.50 | 1.90 - 2.60 | 8.00 - 9.50 | Ti at 0.01 max | ||
| Molybdenum | 0.45 -0.65 | 0.90 - 1.10 | 0.44 - 0.65 | 0.87 - 1.13 | 0.85 - 1.05 | Zr at 0.01 max | ||
Tensile Requirements
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| Seamless |
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| P-5 | P-9 | P-11 | P-22 | P-91 | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. | ||
| Tensile Strength, min., psi | ||||||||
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| ksi | 60 | 60 | 60 | 60 | 85 | ||
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| MPa | 415 | 415 | 415 | 415 | 585 |
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| Yield Strength, min., psi |
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| ksi | 30 | 30 | 30 | 30 | 60 |
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| MPa | 205 | 205 | 205 | 205 | 415 |
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ermissible Variation in Wall Thickness
| NPS [DN] Designator | Tolerance, % from Specified |
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| Over |
| Under |
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| 1/8 to 2 1/2 [6 to 65] incl., all t/D ratios |
| 20.0% |
| 12.5% |
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| Above 2 1/2 [65], t/D < or = 5% |
| 22.5% |
| 12.5% |
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| Above 2 1/2 [65], t/D > 5% |
| 15.0% |
| 12.5% |
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| (t = Specified Wall Thickness; D = Specified Outside Diameter) |
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Elongation Requirements
| Calculated Minimum Elongation Values | ||||||
| Elongation in 2 in. or 50 mm, min % | ||||||
| Wall Thickness | P5, P9, P11, P22 | P91 | ||||
| in. | mm | Longitudinal | Transverse | Longitudinal | ||
| 5/16 (0.312) | 8 | 30 | 20 | 20 | ||
| 9/32 (0.281) | 7.2 | 28 | 19 | 19 | ||
| 1/4 (0.250) | 6.4 | 27 | 18 | 18 | ||
| 7/32 (0.219) | 5.6 | 26 | 17 | |||
| 3/16 (0.188) | 4.8 | 24 | 16 | |||
| 5/32 (0.156) | 4 | 22 | 15 | |||
| 7/8 (0.125) | 3.2 | 21 | 14 | |||
| 3/32 (0.094) | 2.4 | 20 | 13 | |||
| 1/18 (0.062) | 1.6 | 18 |
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| 12 | |
| Permissible Variations in Outside Diameter Outside Diameter at any point shall not vary from standard specified more than: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Mechanical Tests Specified | |
| Transverse or Longitudinal Tension Test and Flattening Test, Hardness Test, or Bend Test | |
| For material heat treated in a batch-type furnace, tests shall be made on 5% of the pipe from each treated lot. For small lots, at least one pipe shall be tested. | |
| For material heat treated by the continuous process, tests shall be made on a sufficient number of pipe to constitute 5% of the lot, but in no case less than 2 pipe. | |
| Notes for Hardness Test: | P91 shall not have a hardness not exceeding 250 HB/265 HV [25HRC]. |
| Notes for Bend Test: | For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test. |
| Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser. | |
| The bend test specimens shall be bent at room temperature through 180 without cracking on the outside of the bent portion. | |
| The inside diameter of the bend shall be 1 inch [25 mm]. | |
| Hydrostatic Test | Each length of pipe shall be Hydro tested, at option of manufacture nondestructive electric testing can be used. |