The normal name of blind flange is flange cover, and some are also called blind flange or pipe plug. The flange without hole in the middle is used to seal the pipe orifice. Its function is the same as that of the head and cover, but the blind seal is a removable sealing device, and the seal of the head is not ready to be opened again. The sealing surface has many forms, such as plane, convex, concave convex, tenon and groove, ring connecting surface and so on. Materials include carbon steel, stainless steel, alloy steel, copper, aluminum, PVC and PPR.
The blind plate and gasket shall meet the following requirements
1.Generally, the blind plate shall have one or two handles to facilitate identification and plugging. The spectacle blind plate may not be provided with handles.
2. Appropriate materials shall be selected as blind plate gaskets according to the nature, pressure and temperature of the medium in the pipeline.
3. Suitable materials shall be selected for the blind plate according to the nature, pressure and temperature of the medium in the pipeline. The high-pressure blind plate shall be designed and manufactured according to the design specifications and pass the ultrasonic flaw detection.
4.The diameter of the blind plate shall be made according to the diameter of the sealing surface of the pipe flange, and the thickness shall be calculated by strength.
Safety requirements for blind plate pumping and blocking operation
1.Operators shall identify harmful factors in the on-site operation environment and formulate corresponding safety measures.
2.Special personnel shall be assigned to supervise the blind plate pumping and blocking operation, and the supervisor shall not leave the operation site.
3.An emergency plan shall be prepared for blind plate pumping and blocking operation in complex and dangerous places.
4.Work permit management shall be implemented for blind plate pumping and blocking operation, and the safety work permit for blind plate pumping and blocking shall be handled before operation.
5.The blind flange pulling and blocking operators shall receive safety education and special safety training, and pass the examination.
6.The production workshop shall draw the location map of the blind plate in advance, number the blind plate uniformly, and assign a special person to be responsible for it. The blind plate pumping and blocking operation unit shall operate according to the drawing.
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Post time: Feb-11-2022