ASME SA 335 P22 Pipes,ASTM A335 P22 Pipe,2.25Cr-1Mo Pipe
We are a professional A335 P22 Pipe, Chrome Moly Seamless steel pipe supplier and exporter in China.ASTM A335/ASME SA335 P22 Alloy Steel Seamless Pipe, P22 material, A335 Chrome Moly Alloy Pipe Gr. P22, P22 Seamless Ferritic Alloy-Steel Pipe, ASME SA335 Grade P22 Alloy Steel Seamless Pipe, ASTM A335/ASME SA335 P22 Alloy Steel Pipe Manufacturer in China
Sizes:
1/4” Nominal to 24”O.D. Seamless Alloy Pipe
Wall Thickness – Schedule 40 through XXH
Length: Single Random Length, Double Random Length, 20 ft, 40 ft
Ends Types: Plain, Beveled
A335 Gr P22 Pipe can be used as starting material to produce A234 WP22 Pipe fittings,and match with A182 F22 flanges,and A182 F22 forged fittings
ASTM A335 / A335M
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.
A335 P22 is one of the grade in ASTM A335/A335M standard, for 2.25Cr-1Mo boiler and superheater with chromium molybdenum high temperature ferritic steel.
A335 P22 Pipe is mainly used in steam pipeline, 300 600MW large capacity power plant boiler tube wall temperature are less than 580 of the superheater and the tube wall temperature are less than 540 of the wall and the header, A335 P22 has been widely used in the United States, Japan and Europe, has a long history in power plant operation that is a mature steel stable performance, good process performance.
ASTM A335 P22 Pipe also called 2 ¼ Chrome OR UNS K21590,
Material: P22, K21590
Equivalent Material: T22, 10CrMo910, 10CrMo9-10, 1.7380, 11CrMo9-10, 1.7383
A335/SA335 Grade P22 Alloy Steel Seamless Pipes are with chromium, molybdenum, and sometimes vanadium. Chromium, or chrome, improves high-temperature strength, increases oxidation resistance and raises the tensile, yield and hardness at room temperatures. Molybdenum increases the strength, elastic limit, resistance to wear, impact qualities and hardenability. It increases the resistance to softening, restrains grain growth and makes chromium steel less susceptible to embrittlement.
ASTM A335 P22 Pipe Inspection and Test:
Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength,Yield Strength, Elongation, Flaring, Flattening, Bending, Hardness, Impact Test), Surface and Dimension Test,No-destructive Test, Hydrostatic Test.
A335 P22 Pipe Chemical composition
| C, % | Mn, % | P, % | S, % | Si, % | Cr, % | Mo, % |
| 0.015 max | 0.30-0.61 | 0.025 max | 0.025 max | 0.50 max | 1.90-2.60 | 0.87-1.13 |
A335 P22 Pipes Mechanical Properties :
| Tensile Strength, MPa | Yield Strength, MPa | Elongation, % |
| 415 min | 205 min | 30 min |
A335 P22 Pipe WALL THICKNESS Tolerance
The tolerances in WT, in %, from specified are:
- 1/8 to 2 1/2 [6 to 65] incl., all t/D ratios: over 20%, under 12.5%
- Above 2 1/2 [65], t/D < or = 5%: over 22.5%, under 12.5%
- Above 2 1/2 [65], t/D > 5%: over 15%, under 12.5%
t = Specified Wall Thickness; D = Specified Outside Diameter)
A335 P22 PIPE TESTING REQUIREMENTS
- Transverse/longitudinal: tension and flattening, hardness, bend tests- for material which has been heat-treated in batch furnaces, these tests shall be made on the 5% of the pipes from each heat lot number. For smaller lots, one pipe at a minimum has to be tested
- Hydro testing: shall be applied to every length of pipe
- The non-destructive electric test is optional
How to order our A335 P22 Seamless Pipes?
