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Blind plate
The eight-shaped blind plate (also known as the eight-shaped sealing plate, blind flange or blind plate flange) is a closed connection device used in pipeline systems. It is usually used for temporary plugging during pipeline installation, maintenance or system commissioning. By connecting with the pipe flange, the eight-shaped blind plate can close the opening of the pipeline system and is suitable for pipeline systems that need maintenance or modification. Its "eight-shaped" design refers to the fact that there are multiple holes on the blind plate. This design is usually used to provide a more secure installation connection and ensure safety in harsh environments such as high pressure and high temperature. The eight-shaped blind plate is widely used in the petroleum, chemical, electric power, pharmaceutical and other industries with high reliability and sealing. (Customized processing is supported)
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1. Product Features
High sealing: By connecting with the flange, the eight-shaped blind plate provides excellent sealing effect to avoid medium leakage.
Porous design: Unlike traditional blind plates, the eight-shaped blind plate is designed with multiple bolt holes to increase the firmness of the installation, especially suitable for large-diameter pipes.
Compression-resistant and durable: Made of high-strength material, it has excellent compression and corrosion resistance, suitable for high-demand working conditions.
Convenient installation and disassembly: Connected with the flange by bolts, it is easy to install, quick to disassemble, reusable, and suitable for long-term closed pipeline interfaces.
Strong adaptability: Widely used in closed pipelines for inspection, pressure testing and other work, suitable for various working environments.
2. Application fields
Petroleum and natural gas industry: used for opening closure of oil and natural gas pipelines for easy inspection and maintenance.
Chemical industry: used for closure during inspection and cleaning of chemical plant pipelines to prevent medium leakage.
Power industry: used in steam pipelines, cooling water pipelines, etc. in power plants, to close pipeline openings for equipment maintenance and inspection.
Metallurgical industry: used to seal the pipeline system in metallurgical equipment for cleaning and inspection.
Pharmaceutical industry: used in pharmaceutical factories to seal pipelines during pipeline inspection, cleaning and pressure testing.
Municipal pipelines: used to seal municipal water supply and drainage pipelines to facilitate pipeline maintenance and commissioning.
3. Technical parameters
| Material | Carbon steel, stainless steel, alloy steel, cast steel, etc. |
| Specification | DN15 ~ DN1200（1/2" ~ 48"） |
| standard | Comply with international standards such as GB, ANSI, DIN, JIS, etc. |
| Surface treatment | Spraying, galvanizing, phosphating, etc. |
| Connection | Bolted connections |
| Temperature range | -50°C ~ 450°C |
| Pipe wall thickness | Suitable for different pipe wall thicknesses, can be customized according to customer requirements |
4. Advantages
High reliability: high-strength materials and precision processing are used to ensure stability and reliability under various working conditions.
Excellent sealing: multiple bolt hole design ensures tight connection with flange, effectively avoiding leakage.
Easy to install and disassemble: bolt connection, easy installation, fast disassembly, suitable for pipelines that are regularly closed or inspected.
Efficient and cost-effective: reusable, reducing the cost of replacement and maintenance.
Strong adaptability: suitable for pipeline systems of various specifications and pressure levels to meet the needs of different working environments.
5. Quality Assurance
All eight-shaped blind plates will undergo strict quality inspection before leaving the factory to ensure that each product has reliable sealing performance and high-strength pressure resistance. Strictly follow international standards for design and production to ensure high quality and durability of products.
6. Packaging and transportation
Packaging: According to the size and quantity of the product, wooden boxes, pallets, bubble films and other protective packaging methods are used to ensure that they are intact during transportation.
Transportation: Provide multiple transportation methods such as sea, air and land transportation to ensure that the products arrive on time.
7. Precautions
Inspection before installation: Before installing the eight-shaped blind plate, check whether the contact surface between the flange and the blind plate is clean to avoid impurities affecting the sealing effect.
Bolt tightening: Make sure all bolts are tightened evenly to avoid loose flange connection or air leakage due to uneven tightening.
Regular inspection: During use, the connection between the blind plate and the pipeline should be checked regularly to ensure its sealing and firmness.
Applicable pressure range: The eight-shaped blind plate is mainly suitable for medium and low pressure systems, not for pipeline systems that are subjected to excessive pressure.
8. Packaging and transportation
Packaging method: According to product specifications and quantity, wooden boxes, foam or pallets are used for packaging to ensure that they are not damaged during transportation.
Transportation method: Support multiple transportation methods such as road, rail, and sea transportation to ensure safe and timely delivery.
9. Price and customization
Price factors: The price of the eight-shaped blind plate is affected by multiple factors such as material, specification, and pressure level.
Customized service: Products with non-standard sizes, special materials or specific pressure levels can be provided according to customer needs to meet various special working conditions.
10. Summary
Due to its convenience, sealing and durability, the eight-shaped blind plate is widely used in the petroleum, chemical, power and other industries. It has a wide range of applications and is easy to install and use. It is an important opening and closing device in the pipeline system. Choosing a suitable eight-shaped blind plate can not only improve the system operation efficiency, but also ensure safety and long-term stability.
