Stainless Steel Spectacle Blind Flange

Types of Line Blinds

Line Blinds come in three basic forms: Spectacle Blinds, Figure-8, and Paddle Blinds. These devices are used to isolate or 'turn off' portions of piping systems. Line blinds can be used together with a valve or instead of a valve. In the image on the right, we see an installed Spectacle Blind in the 'open' position.

The name "spectacle blind flange" is derived from its appearance, resembling the shape of the eyeglasses frame "spectacles" when viewed from the side, with the handle resembling the bridge of the glasses.  This flange plays a crucial role in ensuring the efficient and safe operation of piping systems in various industrial settings.The spectacle blind is sometimes sold split into it’s two parts, the line blank, and the ring spacer.

Line Blanks：The solid side of the spectacle blind can be referred to as a line blank, skillet blind, paddle blank, paddle blind, or spade. It forms a positive shut-off when used alone or as half of a spectacle blind. The line is a 'wafer style' device, designed to fit inside the bolt hole circle. A flange spreader is shown on the right being used to prepare a pair of flanges to accept a line blank and two gaskets. To maintain the spacing of the flanges when the line is open, a ring spacer is used.

Benefits of EATHU Forge

EATHU is a professional flange forging factory in China for thirty years., dedicated to producing and supplying high-quality flange products.  Our continuous technological innovation and quality management have earned us a good reputation and customer base.  We have three flange production lines and one stainless steel flange production line, which can meet the flange needs of different materials and specifications.

EATHU forging factory possesses advanced production equipment, such as CNC lathes, CNC machining centers, and forging equipment.

We have a professional technical team that ensures stable product quality and efficient production.  

Our focus on technological innovation and process improvement allows us to continuously enhance product performance and reliability.  

We have a comprehensive quality control system and testing equipment to ensure strict monitoring and inspection of every aspect of the production process.

Our product line includes various types of flanges, such as Flat Welding Flange, Butt Welding Flange, Socket Welding Flange, Threaded Flange, and more. These flanges are widely used in industries such as petroleum, chemical, electric power, and shipbuilding. Our flange products comply with international standards, such as ANSI, ASME, API, DIN, BS, and JIS. We can also customize and produce flanges according to customers’ special requirements. Our experienced production team can customize flange products to meet various specifications and materials according to customer needs. We strictly implement a quality management system to ensure that each batch of products undergoes rigorous inspection and testing, resulting in stable and reliable product quality.

QC Center

China flange manufacturer EATHU, maintains strict quality control and product testing to ensure the quality of its flanges. The company has established a comprehensive quality management system to achieve the highest level of quality control for each production process. Due to our strict implementation, we have obtained ISO9001 certification.

We accept any third party inspection specified by our customers, such as TUV, DNV, BV, SGS, IEI, SAI, etc. All goods are inspected before packing and shipping.

EATHU's quality control process is well established and detailed.

Customized Solutions

EATHU attaches importance to customer's demand and try to meet customer's demand, we support flange customization and other products customization, EATHU has its own forging factory, can make customized metal parts according to drawings, so that not only can meet customer's requirements for products, but also can avoid material waste and reduce the cost of both sides.

If you need to customize special shape flanges, you can send your drawings, our engineers will give you a quote!