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| Brand Name: | Yuhong nozzle |
| Model Number: | SA182 F11 Class 2 |
| MOQ: | 1 Pcs |
| Price: | 0-1000000USD |
| Delivery Time: | 5 - 45 Work Days |
| Payment Terms: | T/T, L/C, D/A |
SA182 F11 Class 2 Self Reinforced Nozzle for Pressure Vessel ASME BPVC Section VIII Div.1
The SA182 F11 Class 2 Self-Reinforced Nozzle is a critical component in high-temperature and high-pressure systems. Its robust design, excellent mechanical properties, and resistance to harsh environments make it suitable for demanding industrial applications. Compliance with ASME BPVC and rigorous testing ensures that the nozzle meets the highest safety and performance standards.
1. Common Types of Nozzles in Pressure Vessels
| Nozzle Type | Description | Application |
|---|---|---|
| Self-Reinforced Nozzle | Integral nozzle design with reinforcement built into the nozzle itself, eliminating the need for external pads. | Used in high-pressure and high-temperature applications to reduce stress concentrations. |
| Weld Neck Nozzle | Designed with a long tapered hub that is welded to the pressure vessel body. | Common in pipelines and vessels for transmitting fluids under pressure. |
| Slip-On Nozzle | Nozzle that fits over the pipe and is welded both inside and outside for reinforcement. | Suitable for low-pressure applications where stress is minimal. |
| Threaded Nozzle | Contains threads for screw connections, eliminating the need for welding. | Used in smaller vessels and low-pressure systems. |
| Integral Nozzle | Machined as part of the vessel wall or head, providing seamless integration. | Reduces weak points in vessels and is used in critical applications. |
| Long Weld Neck Nozzle | Similar to a weld neck but with an extended hub for better stress distribution. | Common in high-pressure and temperature systems, especially in thermal power plants. |
2. Common Materials for Pressure Vessel Nozzles
| Material | Standard | Description | Applications |
|---|---|---|---|
| SA182 F11 Class 2 | ASTM A182 | Chromium-Molybdenum alloy steel designed for high-temperature and high-pressure applications. | Widely used in pressure vessels, boilers, and heat exchangers. |
| SA182 F22 | ASTM A182 | A stronger Cr-Mo alloy with better creep resistance and corrosion resistance than F11. | Suitable for higher temperature and more aggressive environments. |
| SA516 Gr. 70 | ASTM A516 | Carbon steel with excellent weldability and good mechanical properties. | Used in moderate-pressure vessels and low-temperature applications. |
| SA240 304/316 | ASTM A240 | Austenitic stainless steel with excellent corrosion and oxidation resistance. | Common in chemical and food industries for handling corrosive fluids. |
| SA182 F5/F9 | ASTM A182 | High-temperature ferritic steels with chromium content for oxidation resistance. | Used in high-temperature applications and hydrogen service environments. |
3. Dimensions and Tolerance Range for Pressure Vessel Nozzles
| Parameter | Typical Range | Tolerance | Notes |
|---|---|---|---|
| Outer Diameter (OD) | 50 mm – 1500 mm | ±1% for OD ≤ 500 mm, ±2% for OD > 500 mm | OD is critical for matching the pressure vessel wall and pipe connections. |
| Wall Thickness (WT) | 5 mm – 50 mm | ±10% of nominal thickness | Uniform WT ensures structural integrity and pressure resistance. |
| Reinforcement Height | 10 mm – 120 mm | ±0.5 mm | Applicable to self-reinforced nozzles to meet ASME BPVC requirements. |
| Hub Length | 50 mm – 300 mm | ±1 mm | Ensures proper welding and stress distribution. |
| Overall Length | 100 mm – 2000 mm | ±5 mm | Length depends on design requirements and connection type. |
| Bevel Angle | 30° – 37.5° | ±0.5° | Bevel angle ensures proper weld preparation. |
4. Advantages of Alloy Materials (SA182 F11 Class 2)
| Advantage | Description |
|---|---|
| High-Temperature Strength | SA182 F11 Class 2 retains its mechanical properties at elevated temperatures, making it ideal for high-temperature applications. |
| Corrosion Resistance | The alloy offers good resistance to oxidation and corrosion, especially in environments with steam, hydrogen, or sulfur. |
| Creep Resistance | Excellent resistance to creep deformation under prolonged heat and stress exposure. |
| Weldability | Easy to weld using standard procedures, ensuring strong and durable connections. |
| Longevity | The material’s durability reduces maintenance costs and improves the lifespan of pressure vessels. |
| Wide Applicability | Suitable for boilers, reactors, heat exchangers, and other high-pressure equipment. |
5. Common Applications of Nozzles in Pressure Vessels
| Application | Function of Nozzle |
|---|---|
| Heat Exchangers | Acts as an inlet/outlet for fluid flow, ensuring efficient heat transfer between media. |
| Reactors | Allows the transfer of reactants and products while maintaining pressure and temperature integrity. |
| Boilers | Serves as steam outlets, water inlets, and inspection ports. |
| Storage Tanks | Provides access for filling, draining, and venting fluids or gases. |
| Chemical Processing | Handles corrosive fluids under pressure, ensuring safe and efficient chemical reactions. |
6. Testing Standards for Pressure Vessel Nozzles
| Test | Description | Purpose |
|---|---|---|
| Ultrasonic Testing (UT) | Uses high-frequency sound waves to detect internal flaws or discontinuities in the material. | Ensures the nozzle is free from defects such as cracks or voids. |
| Radiographic Testing (RT) | X-ray or gamma rays are used to examine welds and material integrity. | Detects internal defects that could compromise structural integrity. |
| Magnetic Particle Testing (MT) | Magnetic fields are applied to detect surface and near-surface defects. | Identifies cracks or inclusions on or just below the surface. |
| Dye Penetrant Testing (PT) | A dye is applied to the surface to reveal cracks or defects under ultraviolet light. | Used for detecting surface-breaking flaws. |
| Hardness Testing | Measures surface hardness using methods such as Brinell, Vickers, or Rockwell. | Verifies that the material meets required mechanical specifications. |
| Hydrostatic Testing | The nozzle is subjected to internal pressure with water to test for leaks or deformation. | Ensures the nozzle can withstand the design pressure without failure. |
| Impact Testing (Charpy) | Tests the material’s toughness and ability to absorb energy at low temperatures. | Ensures the material is suitable for low-temperature applications. |
| Chemical Composition Analysis | Spectrometric or wet chemical analysis to verify alloy composition. | Confirms compliance with SA182 F11 Class 2 chemical requirements. |
| Dimensional Inspection | Measures dimensions like OD, WT, and length using calipers or micrometers. | Ensures the nozzle meets design specifications and tolerances. |
7. Compliance with Standards
| Standard | Description |
|---|---|
| ASME BPVC Section VIII | Governs the design, fabrication, and inspection of pressure vessels and their components, including nozzles. |
| ASTM A182 | Specifies the chemical and mechanical requirements for alloy steel forgings used in pressure vessels. |
| EN 10222 | European standard for steel forgings, including materials for pressure vessel nozzles. |
| NACE MR0175 | Ensures material suitability for use in sour gas environments to prevent hydrogen embrittlement. |
| ISO 9001 | Ensures quality management systems are in place for manufacturing processes. |
