|
TECHNICAL DATA SHEET -
WARNINGS |
Page :
1 , 2 ,
3 |
| EN 169 WELDING
AND RELATED TECHNIQUES - TABLE 2 |
| Scale numbers 1.2
to 4 may be used for welding assistants at a distance from the welder. |
|
SCALE NUMBERS FOR GAS
WELDING AND BRAZING |
|
WORK |
q (q =acetylene flow in liters per hour) |
| |
q ≤ 70 |
70 < q ≤ 200 |
200 < q ≤ 800 |
q > 800 |
| Welding and brazing of heavy
metals |
4 |
5 |
6 |
7 |
| Welding with emissive flows
(particularly light alloys) |
4a |
5a |
6a |
7a |
|
SCALE NUMBERS FOR OXYGEN
CUTTING |
| WORK |
q (q =OXYGEN flow
in liters per hour) |
| |
900≤q ≤2000 |
2000 < q ≤ 4000 |
4000 < q ≤ 8000 |
| Oxygen cutting |
5 |
6 |
7 |
|
FILTERS FOR
ULTRAVIOLET EN 170 :
DESIGNATION , PROPERTIES AND SPECIFIC APPLICATIONS - TABLE 3 |
| Scale Number |
Color perception |
Special applications |
Special sources |
| 2-1,2 |
May deteriorate |
To be used with sources that
emit predominant radiation and when glare is not an important factor |
Low pressure mercury vapor
lamps, such as those used to stimulate fluorescence or "black light" |
| 2-1,4 |
May deteriorate |
To be used with sources that
emit predominant radiation and when some absorption of the visible radiation
is necessary. |
Low pressure mercury vapour
lamps, such as actinic lamps. |
3-1,2
3-1,4
3-1,7 |
No significant change |
To be used with sources that
emit predominant radiation at wave length ≤313mm and when glare is not an
important factor. This is applicable to UVC radiation and to most UVB2
radiation. |
Medium pressure vapor lamps
such as germicide lamps. |
3-2,0
3-2,5 |
No significant
change |
To be used with
sources that emit both in the U.V. and visible spectral ranges, and
consequently require attenuation of visible radiation |
Medium pressure mercury vapor
lamps such as photochemical lamps. |
3-3
3-4 |
High pressure mercury vapor
lamps and metal holide vapor lamps such as solar lamps for solarium. |
| 3-5 |
High and very high pressure
mercury vapor lamps and xenon lamps such as sun lamps; solarium end pulsed
lamp systems. |
|
| EN 172 SOLAR
FILTER FOR INDUSTRIAL APPLICATIONS : SCALE NUMBER AND USE - TABLE 4: |
| Scale number |
Use |
Name |
5-1,1
6-1,1 |
These scale numbers are only
applicable to some photochromic filters in the illuminated state and the
highest transmission |
|
5-1,4
6-1,4 |
As very light filter. |
Very light |
5-1,7
6-1,7 |
As light filter. |
Light |
5-2
6-2 |
As filter recommended for most
situations. |
Medium |
5-2,5
6-2,5 |
Widely used in central Europe |
Dark |
5-3,1
6-3,1 |
In tropical or subtropical
regions for observation of the sky, in high mountains for snowy surface,
lakes and sand, chalk and lime pits. Not recommended for driving cars. |
Very dark |
5-4,1
6-4,1 |
For very intense radiation,
cannot be used for driving cars. |
Extremely dark |
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