Astm A335 P22 Alloy Steel Pipe
ASTM A335 P22 seamless chrome-moly alloy steel pipe designed for high-temperature and high-pressure service. Widely used in power plants, refineries, and petrochemical facilities where high creep strength, oxidation resistance, and long-term thermal stability are required.
Standard & Grade
- Standard: ASTM A335 / ASTM A335M
- ASME Equivalent: SA335
- Grade: P22
- Product type: Seamless ferritic alloy steel pipe
- Service: High-temperature and high-pressure applications
Chrome-Moly Material Note
- Commonly referred to as chrome-moly (Cr-Mo) pipe
- Chromium (Cr) improves oxidation and corrosion resistance
- Molybdenum (Mo) increases strength, elastic limit, wear resistance, impact strength, and hardenability
Material & Manufacture
- Pipe may be supplied hot finished or cold drawn
- Finishing heat treatment applied in accordance with ASTM A335
- Suitable for bending, flanging, forming operations, and fusion welding
Heat Treatment Options
- A (Annealed)
- N + T (Normalized and Tempered)
- Q + T (Quenched and Tempered)
Dimensions
- Outer Diameter (OD): 19.05 mm – 114.3 mm
- Wall Thickness: 2.0 mm – 14 mm
- Length: up to 16000 mm
Inspection & Testing
- Hydrostatic test applied to each pipe length
- Non-destructive examination (NDE) in accordance with applicable practices
- Chemical composition inspection
- Mechanical tests: tensile, yield, elongation
- Flattening test
- Hardness test or bend test
- Impact test (where specified)
- Surface and dimensional inspection
Mechanical Test Sampling
- Batch-type furnace: tests on 5% of each treated lot (minimum one pipe)
- Continuous heat treatment: minimum two pipes or 5% of the lot
Surface Treatment
- Oil-dip
- Varnish
- Passivation
- Phosphating
- Shot blasting
Packing & Marking
- Bare packing, bundle packing, or crate packing
- Wooden protection at both pipe ends
- Sea-worthy export packing as required
- Each crate marked with order number, heat number, dimensions, weight, and bundle details