Product Details
Place of Origin: Xi'an, Shaanxi Province, China
Brand Name: PeterTrade,China
Certification: ISO9001,CE, API,etc
Model Number: Blind Flanges（BLRF/BLFF)
Payment & Shipping Terms
Minimum Order Quantity: 100 pieces
Price: negotiable
Packaging Details: Plywood case or pallet, or as per your requirement
Delivery Time: about 20-45 days for delivery
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 200 Ton/Tons Per Month
Standard: |
ASME B16.5 |
Product Name: |
Blind Flanges Flat Face(BLFF) |
Pressure: |
Class 300 |
Sizes: |
1/2''-24''(inch) |
Manufacturing Methods: |
Casting, Forging, Casting And Forging, Medium Plate Cutting, Casting |
Connection Type: |
Welded, Threaded, Socket Welded |
Material: |
Carbon Steel Flanges: A105 A350LF2, A694 F60,A694 F52,A694 F65 Etc. |
Face Type: |
Raised Face (RF), Flat Face (FF), Etc. |
Surface Treatment: |
Black Painting, Galvanized, Anti-rust Oil, Etc |
Application: |
Oil And Gas, Chemical Industry, Water Treatment, Etc. |
Standard: |
ASME B16.5 |
Product Name: |
Blind Flanges Flat Face(BLFF) |
Pressure: |
Class 300 |
Sizes: |
1/2''-24''(inch) |
Manufacturing Methods: |
Casting, Forging, Casting And Forging, Medium Plate Cutting, Casting |
Connection Type: |
Welded, Threaded, Socket Welded |
Material: |
Carbon Steel Flanges: A105 A350LF2, A694 F60,A694 F52,A694 F65 Etc. |
Face Type: |
Raised Face (RF), Flat Face (FF), Etc. |
Surface Treatment: |
Black Painting, Galvanized, Anti-rust Oil, Etc |
Application: |
Oil And Gas, Chemical Industry, Water Treatment, Etc. |
ANSI B16.5 Class 300 Carbon Steel Blind Flanges A105 Raised Face and Flat Face BLRF/BLFF for Pipelines
Introduction:
Shaanxi Peter International Trade Co., Ltd., a reputable and experienced company in the industry, is proud to offer our extensive selection of ANSI B16.5 Class 300 Blind Flanges. With a long-standing history of delivering top-quality products and exceptional service, we are dedicated to providing reliable flanges that meet the highest standards of performance.
Our ANSI B16.5 Class 300 Blind Flanges are engineered to perform reliably across a wide range of industrial applications. Manufactured from high-quality materials like carbon steel, stainless steel, and alloy steel, these flanges are designed to endure demanding operational conditions and maintain long-term reliability in piping systems.
Understanding the need for versatility, we offer our ANSI B16.5 Class 300 Blind Flanges in a broad selection of sizes, ranging from 1/2" to 24" (DN15-DN600), ensuring compatibility with diverse piping needs across various industries. These flanges are rated for Class 300 pressure, capable of handling systems with a maximum pressure of 300 pounds per square inch.
Description of Carbon Steel Blind Flanges:
ANSI B16.5 Class 300 Carbon Steel Blind Flanges, made from ASTM A105 material, are commonly used in medium-pressure pipeline systems. The Class 300 rating indicates that these flanges can withstand pressures up to 300 psi, which is suitable for applications where moderate pressure handling is required. The material, carbon steel, is chosen for its durability, strength, and cost-effectiveness, making it ideal for general-purpose piping in industries like chemical processing, oil and gas, and power generation.
There are two main types of blind flanges: raised face (BLRF) and flat face (BLFF). A raised face flange has a raised area around the bolt holes that enhances the seal between the flanges, providing better sealing pressure. This is particularly useful in higher-pressure applications. On the other hand, flat face flanges have a level surface and are more commonly used in systems with lower pressure where the mating flanges also have flat faces. The flat face design simplifies the installation process and is often used in systems where a gasket is responsible for creating the seal.
Blind flanges serve an essential role in pipeline systems by sealing the ends of pipes. They are frequently employed during maintenance, repair, or modification to isolate sections of the pipeline. Because they lack a central hole like regular flanges, they are designed specifically to close off the pipe without creating an opening. Whether used in high-pressure or low-pressure settings, these flanges provide a reliable, cost-effective solution for closing off pipelines and ensuring system integrity.
In summary, these carbon steel blind flanges are a versatile and essential component for sealing pipeline ends in various industries, with the choice between raised face and flat face depending on the sealing requirements and pressure conditions of the specific application.
ANSI/ASME B16.5 Blind Flange Class 300 Dimensions:
| ANSI/ASME B16.5 Class 300 BLIND FLANGES BLRF | |||||||
| Nominal Pipe size | Outside Diameter | O.D.of Raised Face | Thickness | Drilling |
Approximate Weight(lb) |
||
| D | G | T | Bolt circle diameter | Number of holes | Diameter of Bolt | ||
| 1/2'' | 95 | 35.1 | 14.2 | 66.5 | 4 | 15.7 | 2 |
| 3/4'' | 117 | 42.9 | 15.7 | 82.6 | 4 | 19.1 | 3 |
| 1'' | 124 | 50.8 | 17.5 | 88.9 | 4 | 19.1 | 4 |
| 1.1/4'' | 133 | 63.5 | 19.1 | 98.6 | 4 | 19.1 | 6 |
| 1.1/2'' | 155 | 73.2 | 20.6 | 114.3 | 4 | 22.4 | 7 |
| 2'' | 165 | 91.9 | 22.4 | 127 | 8 | 19.1 | 8 |
| 2.1/2'' | 191 | 104.6 | 25.4 | 149.4 | 8 | 22.4 | 12 |
| 3'' | 210 | 127 | 28.4 | 168.1 | 8 | 22.4 | 16 |
| 3.1/2'' | 229 | 139.7 | 30.2 | 184.2 | 8 | 22.4 | 21 |
| 4'' | 254 | 157.2 | 31.8 | 200.2 | 8 | 22.4 | 28 |
| 5'' | 279 | 185.7 | 35.1 | 235 | 8 | 22.4 | 37 |
| 6'' | 318 | 215.9 | 36.6 | 269.7 | 12 | 22.4 | 50 |
| 8'' | 381 | 269.7 | 41.1 | 330.2 | 12 | 25.4 | 81 |
| 10'' | 445 | 323.9 | 47.8 | 387.4 | 16 | 28.4 | 124 |
| 12'' | 521 | 381 | 50.8 | 450.9 | 16 | 31.8 | 185 |
| 14'' | 584 | 412.8 | 53.8 | 514.4 | 20 | 31.8 | 250 |
| 16'' | 648 | 469.9 | 57.2 | 571.5 | 20 | 35.1 | 315 |
| 18'' | 711 | 533.4 | 60.5 | 628.7 | 24 | 35.1 | 414 |
| 20'' | 775 | 584.2 | 63.5 | 685.8 | 24 | 35.1 | 515 |
| 22'' | 838 | 641.4 | 65.3 | 743.0 | 24 | 41.2 | 640 |
| 24'' | 914 | 692.2 | 69.9 | 812.8 | 24 | 41.2 | 800 |
1.Dimensions are in millimeters(mm).
2.Dimensions can be specified by different purchasers.
Features of ANSI/ASME Class 300 Blind Flanges:
A blind flange is a type of pipe fitting used to seal the ends of pipes. Unlike regular flanges, it does not have a central hole, meaning it cannot connect to other pipes but is used to temporarily close off certain sections of a pipeline or system, commonly during maintenance, repair, or construction. Blind flanges are typically made of materials like carbon steel or stainless steel, which are durable and corrosion-resistant, capable of withstanding certain pressures. Their primary function is to prevent fluid leakage and ensure the integrity of the pipeline. Depending on the design, blind flanges can be classified into flat face (FF) and raised face (RF) types. Raised face blind flanges have a protruding part on the flange surface, providing better sealing performance, and are suitable for high-pressure systems, while flat face blind flanges have a flat sealing surface and are typically used in low-pressure systems or where less sealing performance is required. Blind flanges are not only used at the ends of pipelines but are also widely applied for sealing equipment and vessels, serving protective and isolating functions. In pipeline systems, blind flanges are easy to install, effectively prevent system leakage, and offer high sealing capabilities and strength.
Advantages of ANSI/ASME B16.5 Class 300 Carbon Steel Blind Flanges:
ANSI/ASME B16.5 Class 300 Carbon Steel Blind Flanges offer a range of benefits that make them highly suitable for various industrial applications. These flanges are designed to handle moderate to high pressures, typically up to 300 psi, making them ideal for industries like chemical processing, oil and gas, and power generation, where reliable sealing is critical under such conditions.
Made from carbon steel, these blind flanges offer excellent mechanical strength and durability, ensuring they can withstand the demands of a variety of environments. Their robust construction minimizes the need for frequent replacements, providing long-term reliability. The cost-effectiveness of carbon steel is another key advantage, offering a budget-friendly option without sacrificing strength or performance.
In addition to their structural advantages, these flanges serve the important purpose of sealing off pipeline ends, effectively preventing the leakage of gases or liquids. This function ensures both the safety and integrity of the entire system, avoiding costly leaks and maintaining pressure within the pipeline. The ease of installation further enhances their appeal, as the simple design allows for quicker setup and reduced labor costs.
These blind flanges also prove to be versatile in their use, applicable in a wide range of scenarios, such as isolating sections of a pipeline for maintenance or repair. Whether in high-pressure systems or environments requiring sealing solutions, ANSI/ASME B16.5 Class 300 Carbon Steel Blind Flanges offer a reliable, efficient, and cost-effective option.
Grades of Carbon Steel Flanges:
| Grade | Description | Common Applications | Chemical Composition | Yield Strength (min) | Tensile Strength (min) | Charpy Impact Test |
|---|---|---|---|---|---|---|
| A105 | General carbon steel flange for use in standard industrial applications at room temperature. | Common pipeline systems in oil, natural gas, chemical, and water treatment industries. | Carbon (C): 0.35%, Manganese (Mn): 0.60-0.90%, Silicon (Si): 0.10-0.35% | 250 MPa (36 ksi) | 450-620 MPa (65-90 ksi) | Above -20°C (-4°F) |
| A350 LF2 | Low temperature carbon steel flange for use in low temperature environments, with good resistance to brittle fracture at low temperatures. | Used in low-temperature environments such as LNG (Liquefied Natural Gas) and cryogenic equipment. | Carbon (C): 0.30%, Manganese (Mn): 0.60-0.90%, Phosphorus (P): ≤ 0.035% | 250 MPa (36 ksi) | 485 MPa (70 ksi) | Above -46°C (-50°F) |
| A105N | A105 flange with annealed treatment, offering better mechanical properties and reduced internal stress. | Common use in oil, natural gas, and chemical industries. | Carbon (C): 0.35%, Manganese (Mn): 0.60-0.90%, Silicon (Si): 0.10-0.35% | 290 MPa (42 ksi) | 485 MPa (70 ksi) | Above -20°C (-4°F) |
| A106 | High-temperature carbon steel flange used in high-temperature fluid transmission pipelines. | Steam pipelines, hot oil pipelines, and other high-temperature industrial applications. | Carbon (C): 0.30%, Manganese (Mn): 0.60-0.90%, Sulfur (S): ≤ 0.03% | 205 MPa (30 ksi) | 415 MPa (60 ksi) | Above -20°C (-4°F) |
| A333 Gr.6 | Low temperature carbon steel flange for use in extremely low-temperature environments, especially for the transmission of cryogenic fluids. | LNG pipelines, low-temperature chemical products. | Carbon (C): 0.30%, Manganese (Mn): 0.90%, Phosphorus (P): ≤ 0.035% | 275 MPa (40 ksi) | 485 MPa (70 ksi) | Above -46°C (-50°F) |
| A350 LF3 | Carbon steel flange for use in low-temperature conditions, offering high resistance to brittle fracture at very low temperatures. | Used for extremely low-temperature fluids or gases, cryogenic applications. | Carbon (C): 0.30%, Manganese (Mn): 0.60-0.90%, Phosphorus (P): ≤ 0.035% | 290 MPa (42 ksi) | 485 MPa (70 ksi) | Above -46°C (-50°F) |
| A694 F42/F46/F52 | High-strength carbon steel flanges, typically used for high-pressure and high-strength applications. | High-pressure pipeline systems in the oil and gas industry. | Carbon (C): 0.30%, Manganese (Mn): 1.00-1.40%, Phosphorus (P): ≤ 0.030% | 290-355 MPa (42-51 ksi) | 485-620 MPa (70-90 ksi) | Above -20°C (-4°F) |
Applications of ASME B16.5 Class 150 Carbon Steel Blind Flanges:
ASME B16.5 Class 300 Carbon Steel Blind Flanges are widely used in various industries for several crucial applications, primarily due to their ability to seal pipeline ends securely and withstand moderate to high-pressure conditions. These flanges are essential in systems where reliable isolation, maintenance, and pressure management are necessary.
One of the most common applications is in sealing pipe ends. These blind flanges are often used to block off the end of a pipe or vessel, preventing the leakage of fluids, gases, or other substances. This is particularly important in maintenance and repair processes, where temporary isolation of pipeline sections is needed. For example, when a section of the pipeline requires inspection or replacement, a blind flange can safely seal off the area, ensuring that the rest of the system continues to function without disruption.
Another significant application is in isolation and bypassing systems. In systems where certain pipelines or sections need to be temporarily shut off, blind flanges provide a reliable method of isolating them. This is especially useful in industries like oil and gas, power generation, and chemical processing, where flow control is essential for maintaining system pressure, safety, and integrity.
Additionally, pressure vessel and equipment connections often utilize blind flanges to close off openings in reactors, heat exchangers, or other equipment. This ensures that the equipment operates efficiently without any leaks or loss of material. The Class 300 rating makes them suitable for higher-pressure systems, where other materials might not offer sufficient performance.
In high-temperature applications, carbon steel blind flanges are also commonly used in systems such as steam lines or furnace piping, where the material's durability under elevated temperatures is essential. Furthermore, they are employed in both temporary and permanent sealing solutions, depending on the specific requirements of the application.
Overall, the versatility, durability, and pressure-handling capabilities of ASME B16.5 Class 300 Carbon Steel Blind Flanges make them invaluable in a wide range of industrial settings, where safety, performance, and cost-effectiveness are critical.
