Anhydrous Ammonia piping color codes 2

[maxoverdrive]

I have been through ANSI to determine the piping color codes standard. A-13 basically only lists the labels. The local fire marshall states that he knows of no standard. Am I to design my own standard and submit it to the local fire marshal or is there a generally accepted piping color code scheme?

 

[Montemayor]

maxoverdrive:

Establishing a piping color code for all your plant piping is a great safety and efficiency idea. However, there are no known pipe color codes in the USA. I can vouch for that from experience.

You should establish your own color code according to your taste and your needs. The logical way I was taught to establish the color code was to divide the various fluids into basic categories:

Chemically hazardous and poisonsous;
Flammable and Explosive;
Reactive;
Inert gas;
Fire Water;
Steam;
Cooling Water;
Instrument Air;
Process Air;
Service Air;
Specific & important Products.

I hope this helps.

Art Montemayor
Spring, TX

 

[kenvlach]

The IIAR (International Institute of Ammonia Refrigeration), in conjunction with ANSI, issues guidelines for identification of ammonia lines. There is a publication:
Bulletin 114 - Guidelines for: Identification of Ammonia Refrigeration Piping and System Components
(Date: 1991)
Member Price: $10.00
Non-member Price: $20.00

"This bulletin provides a comprehensive ammonia labeling scheme for companies in need of an identification system that "covers it all." It offers recommendations on label sizes, colors, installation locations and label material requirements."

https://www.iiar.org/f-sitesearch.cfm

From Tape Selection Guide for various ammonia refrigeration system components, accessed by a link at

http://www.labsafety.com/store/product_group.asp?dept_id=5976&cat_prefix=3WA

ammonia piping must be labelled as to physical state (liquid, vapor, or both) and pressure (high or low).

Regarding IIAR Guidelines colors, see the photo for Ammonia Marking Tape at

http://www.labsafety.com/store/product_group.asp?dept_id=5969&cat_prefix=3WA

How it appears to my eyes:
The name 'AMMONIA' is in black text on yellow,
'LIQ' is in black on orange,
'VAP' is in black on blue,
'LOW' is in black on green,
['HIGH' isn't shown],
and flow arrow '-->' is in black on yellow.