What Are Spectacle Blind Flanges?
Spectacle Blind Flanges
Spectacle blinds are made of a pair of components: a paddle blank and a spacer. The spacer matches the inside diameter of the flange. A small nose piece connects the two parts of the spectacle blind. It closes off the pipeline during maintenance. These components are usually made of stainless steel. They come in different sizes and designs and are made from ASTM a182 F304 and F316 grades.
Spectacle Blind Flanges are a popular type of pipe fittings. If you need to connect pipes and other devices, these fittings can help you complete the task. The flanges are available in several materials. Stainless steel is the most commonly used material. Its high corrosion resistance makes it an excellent choice for chemical industries. It also offers high heat resistance and excellent strength against buckling. You can choose spectacle blind flanges in a variety of materials.
Spectacle blind flanges have two pieces. One piece of the flange has a hole and is attached to a tie bar or web. The opening in the middle allows for easy rotation. The flanges are made of carbon steel and stainless steel. Their materials, shapes, and features make them a highly versatile option for many pipe fitting applications. You can even select the material grade of your flange based on your requirements.
Uses of Spectacle Blind Flanges
Spectacle blind flanges are essential pieces in safety devices that are installed between two pipe flanges, either carbon steel or stainless steel. Each piece has a hole in the center, and one disc is outside the pipeline. Carbon steel spectacle blinds are one piece, while stainless steel and alloy blinds are made from multiple pieces. A spacer is used to fill the space between the flange and the pipe, and a handle is attached to the blank by welding.
The main purpose of a spectacle blind flange is to blank off the valves. This means that if one side of a valve is closed, the blind prevents the leakage of the valve. Flow may divert to another part of the equipment, but cannot be diverted around the spectacle blind. Before swinging the blind, the flow must be valved off and pressure relieved. Spectacle blinds come in the following sizes and materials:
A spacer and a flange spade are both common devices for spectacle blinds. Both are used in a variety of applications, ranging from narrow tubing to large pipe diameters. Because the flanges are fixed to the spectacle blind, the spacers may not be removable. They must be installed permanently, preventing any unintended movement. While a spacer provides comfort and lightness, spectacle blinds can cause unwanted stress.