Petroleum Cracking Alloy Seamless Steel Pipes/Tubes
Product Description: Petroleum Cracking Alloy Seamless Steel Pipes/Tubes are engineered to meet the rigorous demands of the petrochemical industry, specifically for use in processes such as ethylene production and other catalytic cracking operations. These pipes are manufactured from high-strength, heat-resistant alloy steel, ensuring they can withstand the extreme temperatures and pressures characteristic of petroleum cracking units.
Advantages:
- Alloy Composition: Provides superior heat and pressure resistance compared to standard carbon steel.
- Seamless Design: Eliminates potential weaknesses at the seams, enhancing the structural integrity.
- Longevity: Designed for extended service life, reducing maintenance and replacement costs.
- Uniform Wall Thickness: Ensures consistent heat transfer and pressure resistance throughout the pipe.
- Resistance to Corrosion: Alloying elements enhance resistance to corrosive environments.
Product Parameter Table:
Attribute | Specification |
Standard | ASTM A333, ASTM A335, ASME SA333, ASME SA335 |
Material Grade | 33 Grade 1, 33 Grade 6, 335 Grade P1, 335 Grade P11, etc. |
Diameter Range | Typically from 1/8" to 24" (varies by manufacturer) |
Wall Thickness | Varies with diameter and application requirements |
Length | Standard lengths available; custom lengths upon request |
Mechanical Properties:
Property | Typical Values |
Tensile Strength | 485-620 MPa |
Yield Strength | 240-415 MPa |
Elongation | ≥ 20% (for most grades) |
Chemical Composition:
Element | Typical Range (%) |
C | 0.12-0.30 |
Mn | 0.35-0.60 |
Si | ≤ 0.50 |
Cr | 0.40-0.75 (for some grades) |
Mo | 0.20-0.35 (for some grades) |
P | ≤ 0.025 |
S | ≤ 0.025 |
Diameter Tolerances:
- The tolerances for outer diameter are typically ±1% of the nominal diameter or ±0.125 mm, whichever is greater.
Applications:
- Petroleum Refineries: Used in the piping systems for transporting and cracking heavy hydrocarbons.
- Chemical Plants: Ideal for high-temperature chemical processing and reaction vessels.
- Heat Exchangers: Suitable for use in heat exchangers that require high thermal efficiency and resistance to thermal shock.
- Pressure Vessels: Employed in the construction of vessels for high-pressure chemical reactions.
- Gas Processing: Utilized in gas processing plants for the transportation of natural gas and other gases.


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