What Is A Paddle Blind?

What Is A Paddle Blind?

What Is A Paddle Blind? A paddle blind is essentially the solid half of a spectacle blind – and is typically used in tighter spaces or areas with limited access. They are also lighter and will more often be used for piping with larger diameters.

How does a spectacle blind work? 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.

What is a hydro blind? Isolation blinds or Paddle Blinds are used to temporarily stop the flow of fluid or gas while sections of process piping are isolated for maintenance. Hydro blinds are typically machined finish and are used for testing where the system is placed under pressure and a more perfect seal is required.

What is a paddle spacer? Paddle spacer blinds or ring spacers are used to fill the space of single blinds when they are removed from the piping system. With space, weight, and other pipeline requirements permitting, it may be more convenient and cost-effective in specific situations to use a spectacle blind.

What Is A Paddle Blind? – Related Questions

How many types of blinds are there in piping?

Spectacle blind, spades, and spacers are also known as figure-8, paddle blank, Slip blind, and spacer. These are three different components that used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown.

What is difference between spectacle blind and spacer?

Jointly they perform the same function as a Spectacle Blind as essentially a simplistic valve. 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 blocked or closed.

What is spectacle blind for?

Spectacle Blinds are generally applied to permanently separating pipesystems, or just to connect with each other. 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.

How do you calculate blind thickness Hydrotest?

The blind flange is attached by bolts causing an edge moment (Fig. UG- 34. /sketch j) in which the thickness can be calculated by : t = d *(CP/SE+1.9W hg/SE*d^3) ½ ………………. Formula (2) (From ASME UG-34)

What are Industrial blinds?

Industrial blinds are positive isolation safety devices that allow craftsmen to work in a safe environment by controlling the flow of fluids and vapors. They also are used for the pressure testing of pipes an and systems after a modification.

Why spacer is used in piping?

Spacer Rings, also known as piping spacers, are used between flanges to correct gaps or misalignment. Spacer rings are sometimes tapered and are almost always custom machined per very specific measurements.

What is spectacle flange?

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 bleed ring?

What Are Bleed Rings

What is a line blind?

Line blinds are safety devices designed for positive shut-off of piping, equipment or storage tanks where positive shut-off is defined as a device in a closed, drop-tight, verifiable, and maintainable position.

What is the difference between a blank and a blind?

RE: What is the difference between a blind flange and a flange blank

What’s a spacer?

A spacer (also sometimes called a holding chamber) is a device that makes using an inhaler easier and more effective. A spacer also helps deliver the medication to the airways – instead of the mouth and throat – where it can work better with fewer side effects.

What is positive isolation?

Positive Isolation: Isolation of process piping, equipment or vessels from hazardous materials (vapors, liquids, or solids) such that it is impossible for hazardous materials to enter the work area. Single Valve Isolation: Most common valves provide only one sealing surface to isolate upstream pressure and fluids.

How do you calculate flange weight?

How to calculate the weight of pipe flanges

Where can I buy blinds online?

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What is a figure 8 blind?

An ‘8 blind’ or a ‘spectacle blind’ is a piping fitting that is used for providing positive isolation. It consists of a pair of metal discs attached to each other as shown in the figure. They are also known as ‘line blanks’, since they are used to blank a line.

What is a spade flange?

Spade flanges are specially designed flanges which are used in the pipeline during shutdown periods and when extensive pipe cleaning operations are taking place.

What is lap joint flange?

A lap-joint flange is a two-component assembly, with a stub end that has a lap-joint ring flange placed over it. The stub end is then butt welded to the pipe, and the flange ring can be rotated to align with the mating flange. This type of flange connection is particularly useful for large or hard-to-adjust flanges.

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