Description
Product Description A335 P5/5b/5c/ Seamless Pipe
Alloy steel pipes are essential components in various industrial applications, particularly in high-temperature and high-pressure systems. Among these, the A335 P5, P5b, and P5c are among the most widely used alloys, especially in industries such as power generation, petrochemical, and chemical processing. These pipes are manufactured according to ASTM A335 specifications, making them reliable and suitable for critical applications.
What is A335 P5/5b/5c Seamless Alloy Steel Pipe?
The ASTM A335 is a standard specification that covers seamless ferritic alloy steel pipe intended for high-temperature service. The grades within the ASTM A335 standard are designed for usage in environments where high temperatures, pressure, and corrosive elements are present.
A335 P5, P5b, and P5c are specific grades of the A335 seamless pipe series, each distinguished by minor variations in their chemical composition and mechanical properties. These pipes are typically used in power plants, refineries, chemical plants, and other high-temperature service industries.
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ASTM A335 P5
: Alloy steel pipe designed for high-temperature service. It provides good resistance to oxidation and corrosion at elevated temperatures.
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ASTM A335 P5b
: Similar to P5 but with additional focus on mechanical properties that enable it to withstand higher pressures in certain applications.
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ASTM A335 P5c
: A slightly improved version of P5, offering enhanced mechanical properties, particularly in terms of creep strength and resistance to thermal fatigue.
These pipes are available in various schedules and diameters, suitable for a range of high-pressure and high-temperature applications.
A335 P5/5b/5c Alloy Steel Pipe Dimensions
NPS (in) OD (in) SCH 10 (WT/ID) SCH 40 (WT/ID) SCH 80 (WT/ID) SCH 160 (WT/ID) SCH XXS (WT/ID)
1/8 0.405 0.049 / 0.307 0.068 / 0.269 0.095 / 0.215 0.123 / 0.159 0.215 / 0.215
1/4 0.540 0.065 / 0.410 0.088 / 0.364 0.119 / 0.302 0.157 / 0.226 0.302 / 0.302
1/2 0.840 0.083 / 0.674 0.109 / 0.622 0.147 / 0.546 0.187 / 0.466 0.294 / 0.294
3/4 1.050 0.083 / 0.884 0.113 / 0.824 0.154 / 0.742 0.218 / 0.614 0.308 / 0.434
1 1.315 0.109 / 1.097 0.133 / 1.049 0.179 / 0.957 0.250 / 0.815 0.358 / 0.599
1 1/4 1.660 0.109 / 1.442 0.140 / 1.380 0.191 / 1.278 0.250 / 1.160 0.382 / 0.896
1 1/2 1.900 0.109 / 1.682 0.145 / 1.610 0.200 / 1.500 0.281 / 1.338 0.400 / 1.100
2 2.375 0.109 / 2.157 0.154 / 2.067 0.218 / 1.939 0.344 / 1.687 0.436 / 1.503
3 3.500 0.120 / 3.260 0.216 / 3.068 0.300 / 2.900 0.438 / 2.624 0.600 / 2.300
4 4.500 0.120 / 4.260 0.237 / 4.026 0.337 / 3.826 0.531 / 3.438 0.674 / 3.152
6 6.625 0.134 / 6.357 0.280 / 6.065 0.432 / 5.761 0.719 / 5.187 0.864 / 4.897
8 8.625 0.148 / 8.329 0.322 / 7.981 0.500 / 7.625 0.906 / 6.813 1.125 / 6.375
10 10.750 0.165 / 10.420 0.365 / 10.020 0.500 / 9.750 1.250 / 8.250 1.406 / 7.938
12 12.750 0.180 / 12.390 0.375 / 12.000 0.500 / 11.750 1.406 / 9.938 1.562 / 9.625
A335 P5 Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.05 – 0.15 |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Silicon (Si) | 0.50 – 1.00 |
| Chromium (Cr) | 4.00 – 6.00 |
| Molybdenum (Mo) | 0.45 – 0.65 |
| Other Elements | None specified |
A335 5b/5C Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.10 – 0.20 |
| Manganese (Mn) | 0.30 – 0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Silicon (Si) | 0.50 – 1.00 |
| Chromium (Cr) | 4.00 – 6.00 |
| Molybdenum (Mo) | 0.45 – 0.65 |
A335 P5 Mechanical Properties
| Property | Value |
| Tensile Strength, min (MPa) | 415 MPa (60,000 psi) |
| Yield Strength, min (MPa) | 205 MPa (30,000 psi) |
| Elongation, min (%) | 30% |
| Hardness, max | Not specified |
A335 5b/5C Mechanical Properties
| Property | Value |
| Tensile Strength, min (MPa) | 415 MPa (60,000 psi) |
| Yield Strength, min (MPa) | 205 MPa (30,000 psi) |
| Elongation, min (%) | 30% |
| Hardness, max | Not specified |
Key Features of A335 P5/5b/5c Alloy Steel Pipes
- High-Temperature Resistance: These pipes are designed to perform in high-temperature environments, making them ideal for steam and heat exchange systems.
- Corrosion and Oxidation Resistance: A335 P5/5b/5c pipes exhibit excellent resistance to oxidation, ensuring long-term durability in industrial settings.
- Strength and Toughness: These pipes are made to withstand the pressure and mechanical stresses that occur during high-temperature applications.
- Seamless Construction: The pipes are manufactured using a seamless process, ensuring uniform strength and integrity without the need for welded seams, which may present weaknesses in high-pressure applications.
Applications of A335 P5/5b/5c Seamless Alloy Steel Pipe
The A335 P5/5b/5c seamless alloy steel pipes are primarily used in industries that require materials capable of performing in high-pressure and high-temperature environments. Their applications include:
- Power Plants: These pipes are used in steam piping systems, superheaters, and reheaters where high pressures and temperatures are encountered.
- Petrochemical Industry: Used for transporting various chemicals at high temperatures.
- Refining and Distillation: These pipes are essential in distillation columns, heat exchangers, and reactors where elevated temperatures and corrosive environments are prevalent.
- Boiler Systems: Suitable for use in the construction of boilers and other high-pressure systems within power generation plants.
- Heat Exchanger Tubes: Used in heat exchangers for cooling systems or heat recovery applications.
Heat Treatment and Process of Manufacturing
A335 P5/5b/5c seamless alloy steel pipes undergo specific heat treatments to ensure their mechanical properties meet industry standards. The typical heat treatment processes for these pipes are:
- Normalizing: This process involves heating the pipe to a high temperature (usually 900°C) and then air-cooling it. This treatment refines the grain structure, improving toughness and strength.
- Quenching and Tempering: The pipes are heated to a specific temperature range and then quenched in water or oil, followed by tempering to achieve the desired hardness and strength.
- Stress Relieving: After quenching, the pipe is reheated to a lower temperature to reduce residual stresses that could affect its performance.
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