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What
are the EN/DIN standards and should they be used in the U.S.?
EN/DIN pipe marker standards are prevalent
in Europe. Although similar in many ways to the ANSI pipe marker
standards, the EN/DIN standard provides a more sophisticated set
of color codes than provided by the ANSI scheme.
For example, Acids are marked in orange and Flammable Liquids
are yellow with the EN/DIN scheme; yet, both use red under the ANSI
system.
The EN/DIN codes are as follows:
| Colors |
Meaning |
RAL
Color |
| blue |
Oxygen |
5015 |
| green |
Water |
6018 |
| red |
Steam
|
3000 |
| gray |
Air |
7001 |
| yellow
& red |
Flammable
Gas |
1021,
3000 |
| yellow
|
Nonflammable
Gas |
1021 |
| orange
|
Acid
|
2003 |
| purple
|
Soap
|
4001 |
| brown
& red |
Flammable
Liquid |
8001,
3000 |
| brown
|
Nonflammable
Liquid |
8001 |
EN/DIN pipe markers are smaller than
ANSI pipe markers and the EN/DIN size recommendations are more flexible.
Internationally, "harmonization"
is more and more common and the ANSI and the EN/DIN standards could
eventually converge. The Ammonia standard is an example of this
effort. Currently, safety sign and label standards, traffic sign
standards and sign symbol standards are all undergoing an active
harmonization effort. The 16-part MSDS form is another rapidly emerging
international standard.
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