What is a spectacle blind in piping?
Spectacle Blinds are simple safety devices that are installed between two pipe flanges. To stop the flow in the pipeline, the blind end is rotated into place between the flanges. This positively isolates the downstream piping and equipment. A Spectacle Blind is generally installed as a permanent fixture.
What is the use of spectacle blind?
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 the difference between spade 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 a spectacle plate?
A Spectacle Blind is a steel plate cut into two discs of a certain thickness. The two discs are attached to each other by section of steel similar to the nose piece of a pair of glasses. One of the discs is a solid plate, and the other is a ring, whose inside diameter is equal to that of a flange.
What is a paddle blind?
A Paddle Blind is basically the solid half of a Spectacle Blind. A Paddle Blind is often made from one solid metal disc and will usually have a thin length of metal attached to one end to be used as a handle. A finished assembly will resemble the shape of a paddle, hence the name.
Is spectacle blind a flange?
Spectacle blind flanges – also known as figure-8 blind flanges – are generally pieces of metal. Spectacle blind flange cut to fit between two pipe flanges and usually sandwiched between two gaskets. A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel.
What is a line blind?
Line Blinds are an assembly that makes the process of blanking off a line into a simple procedure. Our design accomplishes the task without the use of any tools. The operator simply turns the handle and swings or slides the plate. The blind is designed to be an integral piping component.
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.
What is a blank flange?
Blind flanges are commonly produced and stocked in several different materials. They are often called Blank Flanges. These flanges are used for capping off or terminating another flange.
What is puddle pipe?
Introduction & Applications. Flexseal Puddle Flanges ensure a watertight and pressure-tight seal where pipes pass through concrete walls of any structure or building. When a pipe is required to pass through a wall or concrete structure it is usually cast at the point of construction.