What is the difference between spacer and spectacle blind?
Difference between Spectacle Blind and Spade and Spacers Spade and Spacer combinedly comparable to Spectacle Blind. So, a spectacle blind is combined form of spade and spacer. For larger pipe sizes the weight of spectacle blind become too heavy. So sometimes, as the requirement arises, a spade or spacer is used.
What is the difference between spade and blind?
Spades and Ring Spacers are basically the same as Spectacle Blinds, except that both are not attached to each other. Spades and Spacers be applied in systems where maintenance is often not necessary, or in applications with large pipe sizes.
What is a raised face blind flange?
We carry a full line of stainless steel raised face blind plate flanges, used to block the end of a pipe system or valve. The raised face concentrates more pressure on a smaller area, which provides increased containment capability. Stainless Steel Raised Face Blind Flanges. Types: Raised Face Blind.
What is the use of jack screw flange?
This jack screw is used to facilitate separating the flanges for inspection or replacement of the Orifice Plate and gaskets. The range of orifice flanges covers all standard sizes and ranges, and all common flange materials.
What is a spectacle blind?
Spectacle Blinds are simple safety devices that are installed between two pipe flanges. During normal operation, the open end is installed as a spacer to allow uninterrupted flow. To stop the flow in the pipeline, the blind end is rotated into place between the flanges.
How do you install spectacle Blinds?
Spectacle Blind Installation Spectacle blinds install between two horizontal pipe runs. Instead of bolting the blind in place around the full circumference of the pipe like you would a pipe flange, you instead install it by inserting one of the flange bolts through the hole on the central tie bar.
Can you connect a flat face flange to a raised face flange?
Flat face flanges are never to be bolted to a raised face flange. ASME B31. 1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required.
What is a spectacle flange?
A spectacle flange is a specialty flange made of two metal discs attached in the middle by a small section of steel. Spectable flanges get their name because they look like a pair of reading glasses, or spectacles.
How does a jack screw work?
A jackscrew, or screw jack, is a type of jack that is operated by turning a leadscrew. It is commonly used to lift moderately and heavy weights, such as vehicles; to raise and lower the horizontal stabilizers of aircraft; and as adjustable supports for heavy loads, such as the foundations of houses.
What is difference between spade and spacer?
The Spade or Spacer is fitted in the line between two flanges and is bolted in place. The Spacer is used when the line is required open and the Paddle Blind or Spade is installed when the line is required to be blocked or closed.
How do you turn on Spectacle Blinds?
Adjusting spectacle blinds is straightforward. Simply loosen the bolts around the flange leaving the bolt running through the spectacle blind in place, rotate the desired face into the space between the pipes, and tighten the flange bolts again, some piping applications will require new gaskets to be installed.
Why Jack Screw flange is required for spectacle blinds?
For larger size blinds, Jack Screw Flange is required. Jackscrew help in spreading the flanges and replacing the spacer/blind or turning of spectacle blind. As Spectacle Blind, Spades and Spacers belong to the family of pipeline isolation devices, they are used to provide flexibility during operation and maintenance.
What is a spectacle blind on a pipe?
Posted in Pipe Flange A spectacle blind or spec blind, abbreviated as SB, is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device.
What is a spectacle blind and spacer?
What is a Spectacle blind and Spacer Spectacle blind and Spacers are a pressure-retaining device used in the piping/pipeline industry to temporarily or permanently blind (shut) or isolate part of the piping or pipeline system. A spectacle blind is a forged product and combination of a flange spade and a ring spacer in one single product.
How do spectacle blinds work?
One of the discs is a solid plate, and the other is a ring, whose inside diameter is equal to that of a flange. Spectacle Blinds be applied in systems, which regularly need to be separated from other installations. Normally, a Spectacle Blind is mounted in the “open” position so that flow through the pipe is possible.