GB Blind Flanges

The formal title of blind disk is Flange cover, and some are additionally referred to as blind flange or pipe plug. It is a flange barring a gap in the center and is used to seal the pipe opening. The feature is the equal as that of the head and cap, besides that the blind seal is a detachable sealing device, and the seal of the head is now not equipped to be opened again. There are many kinds of sealing surfaces, which includes plane, convex, concave and convex surface, tenon and groove floor and ring connection surface. The substances are carbon steel, stainless steel, alloy steel, copper, aluminum, PVC and PPR.



From the look of the blind plate, it is typically divided into plate kind flat blind plate, parent eight blind plate, plug board, and gasket ring (plug board and gasket ring are blind to every other). The blind plate performs the position of isolation and cutting, and the position of the head, pipe cap and welding plug is the same. Due to its excellent sealing performance, it is typically used as a dependable capacity of isolation for structures that require entire isolation. A flat plate blind is a strong circle with a cope with that is used in structures that are commonly isolated. The figure-8 blind plate is fashioned like a figure-8, one quit is a blind plate, and the different give up is a throttle ring, however the diameter is the equal as the diameter of the pipe, and it does no longer play a throttling role. The figure-8 blind plate is effortless to use, when it wants to be isolated, the blind plate quit is used, and when regular operation is required, the throttle ring quit is used, and it can additionally be used to fill the set up hole of the blind plate on the pipeline. Another characteristic is that it is certainly marked and convenient to discover the set up status.

Production process

Generally, there are 4 types: forging, casting and forging, medium plate cutting, and casting. Among them, the fee of forging merchandise is the highest, accompanied by way of medium plates, and casting and forging is the lowest. Casting is the most superior process. The fantastic is accurate for forging and center plates, and the casting and forging are barely worse.

Where the blind plate is applied

1. In the unique start-up guidance stage, when the power take a look at or tightness take a look at of the pipeline can't be carried out at the identical time as the related tools (such as turbines, compressors, gasifiers, reactors, etc.), a blind plate must be set at the connection between the gear and the pipeline.

2. When the system is stopped, if the pipeline is nonetheless in operation, a blind plate is set at the shut-off valve.

3. When the gadget is multi-series, the primary pipeline from backyard the boundary region is divided into heaps of pipes to enter every series, and a plate is set at the shut-off valve of every sub-pipeline.

4. When the units want to be usually maintained, inspected or switched with every other, and the gear worried desires to be absolutely isolated, a blind plate is set at the shut-off valve.

5. When the procedure pipeline of the pressurized pipeline and the displacement fuel pipeline (such as nitrogen pipeline and compressed air pipeline) is related to the equipment, a plate is set at the shut-off valve.

6. If the procedure medium wants to be targeted in a unified series system, a blind plate must be set up in the back of the shut-off valve.

7. The exhaust pipe, liquid discharge pipe and sampling pipe of tools and pipeline need to be furnished with blind plate or plug in the back of the valve. Except for substances that are non-toxic, non-hazardous to fitness and non-explosive hazards.

8. When the system is built in stages, the interconnected pipelines are set up at the shut-off valve to facilitate the subsequent building of the project.

9. When the gadget is in regular production, some auxiliary pipelines that want to be totally reduce off ought to usually be set up with blind plates.