A 335 Grade P91 Pipes,ASTM A335 Gr P91 Seamless Pipe,A 335 P91 Pipes
China ASTM A335 Grade P91 Pipes
We are a professional A335 P91 Seamless steel pipe supplier and exporter in China.A335 P91 Pipes is a typical Cr-Mo alloy steel pipe for powerplant service.As a experienced A335 P91 Pipes supplier in China.We produce and stock high quality of A335 P91 Pipes.
A335/SA335 P91 Pipes is a ferritic alloy steel that has very high strength properties, which do not deteriorate with time, and are creep resistant. It is also called 9 Cr 1 Mo steel, or chrome moly pipe, based on its composition.
Compared to its predecessors, the T22 or P22 grade, grade P91 exhibits high strength, enduring temperatures up to 600 °C. The oxidation temperature limits are also higher allowing elements to be engineered with less thickness. This contributes to an almost 10 times higher thermal fatigue life and allows engineers to increase the operating temperature to a higher level, increasing efficiency.
P91 is most commonly used in the power industry and petrochemical plants where fluids and gases are transported at extremely high temperatures and pressures.
A335 Grade P91 can be used as the starting material to manufacture the A234 Wp91 pipe fittings etc.
ASTM A335 P91 SEAMLESS ALLOY STEEL PIPE Specification |
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| Type | Seamless |
| Standard | ASTM A335 P91, SA335 P91 |
| Craft | Hot rolled and Cold drawn |
| Length | 6 meters,SDR,DRL,or cut length |
| Schedules | SCH 40, SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules |
| Origin | China |
| Size | 1/2” NB to 36” NB |
| Tolerance | ASTM A335,ASTM B36.10 |
| Specialized in | Large Diameter ASTM A335 P91 Pipe |
| End | Plain End, Beveled End, |
| Application | Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service |
A 335／A335M-05a Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
Standard Specification for Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service
The most commonly used P grades in the power generation industry and petro-chemical plants are P11, P22 & P91.
This specification covers seamless ferritic alloy-steel pipe for high-temperature service. The pipe shall be suitable for bending, flanging (vanstoning), and similar forming operations, and for fusion welding. Grade P2 and P12 steel pipes shall be made by coarse-grain melting practice. The steel material shall conform to chemical composition, tensile property, and hardness requirements. Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices. The range of pipe sizes that may be examined by each method shall be subjected to the limitations in the scope of the respective practices. The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.
Alloy Steel A335 P91 Pipes Chemical Composition
| Alloy Steel P91 | C | Cr | Mn | Mo | P | S | Si |
| 0.08-0.12 | 8.00 – 9.50 | 0.30-0.60 | 0.85 – 1.05 | 0.020 max | 0.010 max | 0.20 -0.50 |
Alloy Steel A335 P91 Pipe Mechanical Properties
| Tensile Strength, MPa | Yield Strength, MPa | Elongation |
| 585 min | 415 min | 20 min |
A335 Grade p91 Pipe may be either hot finished or cold drawn with the finishing heat treatment noted below.
A335 Grade p91 Pipe Heat Treatment
- A / N+T
- N+T / Q+T
- N+T
Mechanical Tests Specified of ASTM A335 P91
- 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.
ASTM A335 P91 High Pressure Semaless Boiler Pipe Alloy Seamless Steel Pipe ASTM A335 P91 Seamless Alloy Steel Pipe
Steel grade: ASTM A335 P91
ASTM A335 P91 alloy steel pipe
Each length of pipe shall be subjected to the hydrostatic test. Also, each pipe shall be examined by a non-destructive examination method in accordance to the required practices.
The different mechanical test requirements for pipes, namely, transverse or longitudinal tension test, flattening test, and hardness or bend test are presented.Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
How to order our A 335 P91 alloy seamless steel Pipes?
16″ NB X SCH XXS ASTM A 335 Grade P91 seamless Pipes,length 6000mm,Qty:120 pcs
