What is blanking of pipe?

What is blanking of pipe?

Blanking or blinding – The absolute closure of a pipe, line, or duct by the fastening of a solid plate (such as a spectacle blind or a skillet blind) that completely covers the bore and that is capable of withstanding the maximum pressure of the pipe, line, or duct with no leakage beyond the plate.

How is gas pumped through pipelines?

Oil pipelines are made from steel or plastic tubes which are usually buried. The oil is moved through the pipelines by pump stations along the pipeline. Natural gas (and similar gaseous fuels) are pressurized into liquids known as Natural Gas Liquids (NGLs).

What is spade in oil and gas?

The Paddle Blind (Spade, Line Blind) is made from a round piece of different type of material, with a handle furnished in a different form, according to the dimensional standard.

What is the use of spacer 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 does blanking mean?

Wiktionary. blankingnoun. An instance of something being blanked out.

What does blanking mean in confined space?

absolute closure
“Blanking or blinding” means the absolute closure of a pipe, line, or duct by the fastening of a solid plate (such as a spectacle blind or a skillet blind) that completely covers the bore and that is capable of withstanding the maximum pressure of the pipe, line, or duct with no leakage beyond the plate.

How fast does gas flow in a pipeline?

Natural gas moves through the transmission system at up to 30 miles per hour, so it takes several days for gas from Texas to arrive at a utility receipt point in the Northeast.

How gas gets to your home?

Natural gas companies drill thousands of feet into the earth and use big wells and pumps to bring it to the surface. Then they send the gas to your town through gas mains buried underground. More pipes connect the meter to the gas appliances you use at home, like the furnace, water heater, clothes dryer or stove.

What is the 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 blocked or closed.

What is the difference between spade and spectacle 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 the difference between Spade and spacer?

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 do blanking Spades look like on gas pipelines?

I often see specifications for refurbishing works on gas pipelines calling for blanking spades, to separate the area worked on from the rest of the gas system. This is in addition to closing valves. Googling showed me some pictures of how blanking spades look like, but I don’t yet understand the process of installing them.

How are blanking Spades actually used in plumbing?

The most straightforward way would be to mount them between flanges, after a section of pipe has been valved off and flushed. How are blanking spades actually used? The most straightforward way would be to mount them between flanges, after a section of pipe has been valved off and flushed. This is correct.

How are Blind flanges used in gas pipelines?

They are usually secured in place by the flange bolts and sealed by a gasket or O-ring, similar to how wafer pattern valves are installed. Sometimes dedicated ‘blind flanges’ are provided in the pipeline for this purpose, but often the inlet or outlet flanges on valves or equipment are used.

What does a utility Pig do on a gas line?

Utility pigs are used for cleaning, dewatering, and sealing of gas pipelines. To flush a gas line, a utility pig sweeps through the internal section, scraping off debris and semi-solids that obstruct or limit the flow of hydrocarbons.