Performance and Features

　　Compared to the first generation, the second-generation blind flange addresses several issues users encountered, such as: For vertical blind flanges, water and dust often accumulate around the head cover, leading to rust and making it difficult to open the flange. Additionally, with high-pressure, large-sized blind flanges, the heavy head cover makes opening extremely challenging. The second-generation design has been improved—both the inner and outer surfaces of the head cover feature curved shapes for better stress distribution and reduced weight. A safety anti-rotation ring has also been added above the locking ring to prevent instability. Furthermore, a dust-proof ring has been incorporated between the head cover and the vessel flange, effectively preventing rainwater, sand, and other debris from accumulating and causing corrosion. This product outperforms the first-generation blind flange and is especially well-suited for high-pressure, large-scale equipment.

　　Equipped with a safety interlock device

　　This product comes with a safety interlock device; users can optionally add an audible and visual alarm system if desired.

　　Before opening the blind plate, the safety interlock must first be disengaged; otherwise, it cannot be opened. If an audible and visual alarm is installed, during the process of releasing the safety interlock, the alarm will activate if residual pressure remains inside the equipment. In this case, you must continue venting until all residual pressure is completely released, at which point the alarm will automatically stop.

　　Before closing the blind plate, first install the safety interlock device; otherwise, the equipment cannot be pressurized. If a sound-and-light alarm has been added, it will continuously sound an alert at this point, reminding the operator to check the safety interlock mechanism.

　　During the process described above, the alarm continuously displays the pressure value inside the device (on the digital display).

　　Main uses

　　Quick-opening pressure vessel

　　Crude oil filter

　　Natural Gas Filtration Separator

　　Pipeline Pig Receiving and Launching Device (commonly known as: Pig Launcher/Receiver)

　　Scope of Application

　　Design diameters (mm): 1000, 1200, 1400, 1600, 1800, 2000

　　Design Pressure (MPa): 10, 12, 14, 16, 18, 20, 24, 28, 30, 32

　　Design code: GDMB1200/16-L GDMB – Product code, 1200 – Design diameter, 16 – Design pressure, L – Vertical, H – Horizontal

　　Note: 1. The design diameter refers to the inner or outer diameter of the equipment connected to the quick-opening blind plate.

　　2. Users can customize the diameter and design pressure as needed.

　　Ordering Instructions

　　When placing an order, please specify the following details:

　　Clearly specify the blind flange interface diameter as either the inner (or outer) diameter, wall thickness, and weld groove type.

　　Clearly define the design pressure, design temperature, working medium, and its corrosion characteristics.

　　When selecting the material for blind flanges (or the material of the equipment to which the blind flanges are connected), is it necessary to provide HIC and SSC test reports for sulfur-resistant materials?

　　Is it "vertical" or "horizontal";

　　Others: such as whether to install audible and visual alarm devices, etc.