Carbon Steel 8 Spectacle Blinds

 

Carbon Steel 8 blinds or Spectacle blinds consist of a ring (spacer) and a plate (spade). In the event of an item of equipment being shut down, the plate covers the ring to form an airtight seal. Our spectacle blinds are designed to ensure that an item of equipment can be securely blanked off, with no possibility of leakage in the valve.

Carbon Steel 8 Spectacle Blinds

 

An ‘Carbon steel 8 blind’ or a ‘Carbon steel spectacle blind’ is a piping fitting that is used for providing positive isolation. It consists of a pair of Carbon steel discs attached to each other. These Carbon steel discs are cut to fit between two Carbon steel pipe flanges and generally sandwiched between two gaskets. One of the Carbon steel discs is solid and is used for blinding or isolating the pipe line, during maintenance. The other Carbon steel disc has a circular hole to match the pipe internal diameter. The function of this metal disc is to allow the flow through the pipe line during normal operation in on. Two Carbon steel discs are attached to each other using a metal piece with a small hole in it which can be used for rotating the Carbon steel 8 blind or Carbon steel spectacle blind. So during normal operation the solid Carbon steel disc is outside the pipe and hollow disc allows the continuity of flow through the pipe line. While During maintenance work this Carbon steel 8 blind is rotated so that the hollow disc is outside the pipe while solid Carbon steel disc blocks or isolates the fluid flow of that particular pipe line.

The name spectacle blind comes from the spectacle like appearance of the device and the name 8 blind originates from the two circular discs used to make the device. They are generally installed as a permanent device to separate process piping systems. They are often used along with block and bleed valve assemblies meant to provide positive isolation for maintenance on the process facilities. After that block and bleed valve is closed and equipment is depressurized and drained, the 8 blind / spectacle blind can be rotated into close position to provide additional isolation from process fluids entering the maintenance area.

The whole idea of a spectacle blind is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just bypassed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valved off and pressure relieved prior to loosening flange bolts and swinging the blind.

Because safety is the most important to the function of our Carbon steel spectacle blinds, we assure that they are tested exactly to clients specifications. We manufacture and supply spectacle blinds come in pressure ratings of 150lbs, 300lbs, 600lbs, 900lbs, 1500lbs and 2500lbs. All our manufactured and supplied Carbon steel Spectacle blinds are available dimensionally in accordance with API 590 and ASTM 16.48 or customer requirements.

We are proud to establish ourselves amongst the leaders of market as Carbon Steel 8 blinds Manufacturer and Suppliers . Carbon Steel Spectacle Blind Flanges available with us provided at reasonable prices with no quality compromise ensures optimum level of customer satisfaction.

 
Carbon steel Spectacle Blinds Class 150 as per ANSI B16.48 Specifications
Carbon steel Spectacle Blinds Class 300 as per ANSI B16.48 Specifications
Carbon steel Spectacle Blinds Class 600 as per ANSI B16.48 Specifications
Carbon steel Spectacle Blinds Class 900 as per ANSI B16.48 Specifications
Carbon steel Spectacle Blinds Class 1500 as per ANSI B16.48 Specifications
Carbon steel Spectacle Blinds Class 2500 as per ANSI B16.48 Specifications

 

Ask for any Third Party Inspection With our quality Carbon steel spectacle blind flanges:
Carbon steel forged flanges with Lloyds third party inspection and certifications according to EN. 10204-3.2:2004
Carbon steel forged flanges with Bureau Veritas third party inspection and certifications according to EN. 10204-3.2:2004
Carbon steel forged flanges with DNV third party inspection and certifications according to EN. 10204-3.2:2004
Carbon steel forged flanges with SGS third party inspection and certifications according to EN. 10204-3.2:2004
Carbon steel forged flanges with Indian Registrar of Shipping third party inspection and certifications according to EN. 10204-3.2:2004

 

Apart from Carbon Steel 8 Spectacle Blinds we do manufacture a wide range of Carbon steel Spectacle blinds as mentioned below