Piping Isolation Component Nomenclature 1

[sshep]

My Friends,

I am working on a job in the USA with a team of people who have come from various other companies, countries, sites, etc. Recently there has been some confusion in the terminology people are using for various piping isolation components like: spectacle blinds, figure 8's, slip plates, blanks, blinds, spades, flat caps, pancakes, steam-out blinds, etc. These terms have local meanings with respect to purpose, location, thickness, strength, material, etc.

Is there a standard American (API, ASME, ANSI, etc) reference for such hardware so that we all use the same lingo? One possible reference would be API STD 590, but this is no longer active, and not part of our IHS subscription.

Any help is appreciated.

best wishes,
SShep

 

[pennpiper]

If you have a lot of people coming from many different backgrounds/cultures I suggest you produce a Project Glossary. Settle on one Key definition for things and make it mandatory the definitions for the terms are followed.

Remember there are "Types" of things (i.e. Valves: Gate, Globe, Plug, Ball, etc.) and there are "Functions" for things (i.e. Valves: Vent, Drain, Block, Throttling, etc.)
Therefore:
Type
- Spectacle Blind, Figure 8's = Same object and configuration
- Slip Plates, Paddles, blanks, blinds, spades, flat caps, pancakes, etc. The shape of all of these is one half of a Spec Blind or Figure 8. These all normally require a "Ring" Spacer to be inserted where the Slip Plate or Paddle will go.

Function
- steam-out blinds = A Spec Blind/Fig 8 or any of the other configurations can be used for Steam Out Isolation
- Shut-Down Blinds = A Spec Blind/Fig 8 or any of the other configurations can be used for Shut-Down Isolation

Sometimes its possible to do all the right things and still get bad results

 

[LittleInch]

Asme b16.48 has the correct definitions and sizing

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.