ASTM A335 P91 Seamless Alloy Steel Pipe High Pressure Boiler tube 1422 * 140mm size
1. Reference Documents
- ASTM A999/A 999M Specification for General requirements for Alloy and Stainless Steel Pipe.
- ASTM E 213 Practice for Ultrasonic Examination of metal Pipe and Tubing
- ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
- ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
- ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
- ASME B26.10M Welded and Seamless Wrought Steel Pipe
2. Standards:
ASTM A335 Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
3. Application:
For high pressure boiler and steam header pipes; petrochemical industry pipes; thermal power plant; nuclear power plant; USC boiler.
4. Ordering Information
Quantity (feet, meters, or number of lengths),
Name of material (seamless alloy steel pipe),
Grade (P91),
Manufacture (hot-finished or cold-drawn),
Size using one of the following:
NPS and schedule number;
Outside diameter and nominal wall thickness;
Outsider diameter and minimum wall thickness;
Inside diameter and nominal wall thickness;
Inside Diameter and minimum wall thickness.
Length (specific or random)
End finish (plain end or bevel end)
5. Chemical Requirements
| Chemical Requirements |
| Grade | UNS Designation | Composition, % |
| C | Mn | P
max | S
max | Si | Cr | Mo | Others |
| P91 | K91560 | 0.08-0.12 | 0.30-0.60 | 0.020 | 0.010 | 0.20-0.50 | 8.00-9.50 | 0.85-1.05 | V 0.18-0.25 |
| N 0.030-0.070 |
| Ni 0.40max |
| Al 0.02max |
| Cb 0.06-0.10 |
| Ti 0.01 max |
| Zr 0.01max |
6. 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. |
7. Tensile Requirements
Tensile Strength min.: 85ksi / 585MPa
Yield Strength min.: 64ks / 415MPa
8. Inspection & Test
Chemical composition, mechanical properties ( tensile strength, yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension, NDE, hydrostatic test.
9. Manufacture
Hot Rolled or Cold Drawn
10. Manufacturing Process
Raw Material Inspection → Cold Centering → Heating → Piercing & Rolling → SIzing → Heat Treatment → Testing → Finishing → NDE → Visual & Dimension Inspection → Marking → Storing & Shipping
11. Supplementary Requirements
S1. Product Analysis
S2. Transverse Tension Tests
S3. Flattening Test
S4. Metal Structure and Etching Tests
S5. Photomicrographs
S6. Photomicrographs for Individual Pieces
Product Tags:
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ASTM A335 P91 Seamless Alloy Steel Pipe High Pressure Boiler tube 1422 * 140mm size Images
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