what is the meaning of "No Loop Or Do Not Pocket"? - Pipelines, Piping and Fluid Mechanics engineering (2024)

FAQs

What does "no pockets" mean on a P&ID? ›

No-pocket lines have a layout that allows liquid to drain down and vapor to vent up, obviating vents or drains. Process or startup and shutdown conditions may set the line sizing. If the liquid and vapor flow in the same direction during normal operation, very little extra care is needed.

An air pocket implies a relatively large volume of air, likely to accumulate on top of the pipe cross section. The pockets may travel along the line to peaks. There they will either remain in equilibrium, be entrained by the flowing water or be released through air valves.

"Do not pocket" means that the vapor can condense and perhaps fill the vapor line with liquid if it is not level or sloping toward the next piece of equipment.

Air-release valves are an essential component in the design of system piping. These valves are hydro-mechanical devices that vent pockets of air as they accumulate in a system. In general, as the liquid is pumped, entrained air will bubble up to the high points in the system piping.

RE: Free Draining vs No Pockets

Free draining means that the line can totally drain in either or both directions to empty the line. No pockets means that there should be no liquid traps. The resulting piping configuration described by these two notes will often be the same.

A pocket is a bag- or envelope-like receptacle either fastened to or inserted in an article of clothing to hold small items. Pockets are also attached to luggage, backpacks, and similar items. In older usage, a pocket was a separate small bag or pouch.

Air/gas pockets and pressure transients

These surges, especially in force mains weakened by corrosion, can cause intensive and severe damage to pipelines, resulting in soil and water source polluting leakage, and health endangering pathogen and contaminant intrusion to drinking water transmission systems.

Definition of 'pocket' pocket. (pɒkɪt ) countable noun [oft poss NOUN, noun NOUN] A pocket is a kind of small bag which forms part of a piece of clothing, and which is used for carrying small things such as money or a handkerchief.

If you are out of pocket, you have less money than you should have or than you intended, for example because you have spent too much or because of a mistake. Card fraud causes huge inconvenience and the experience can often leave you out of pocket.

What does in of pocket mean? ›

having more money than you started with after an activity involving money: Even when we've paid all our expenses, we should still be several hundred pounds in pocket. Investors who put money into funds before the start of 2000 are actually still in pocket. Compare. out of pocket mainly UK.

The term “NO POCKET” means no liquid pocket in the line. When it's necessary to prevent vapor pockets, the note will read “NO VAPOR POCKETS”. For “NO POCKET” lines elevation changes are either vertically up or vertically down, but not both.

So, What are 3 types of plumbing systems? The three types of systems are potable water, sanitary drainage, and stormwater drainage.

Patch, flap, and side seam pockets are the three primary varieties of pockets. The standard pocket that is sewn to the clothing is the patch pocket. Side seam pockets are slits in the garment with a pocket pouch within, while flap pockets include a flap that covers the pocket opening.

Let's take a look at how these are commonly represented. – NO LINE: The instrument is located in the field near the process & operator. – SOLID LINE: The instrument is located in a control room (accessible to the operator). – DOTTED LINE: The instrument is not directly accessible.