ASME Guidelines
Feedwater - ASME Consensus
on Operating Practices
| Drum
Operating Pressure
(psig) |
| Feedwater |
0-300 |
301-450 |
451-600 |
601-750 |
751-900 |
901-1000 |
1001-1500 |
1501-2000 |
| Diss. Oxygen
| <40ppb |
<40ppb |
<7ppb |
<7ppb |
<7ppb |
<7ppb |
<7ppb |
<7ppb |
| Total Iron |
<100ppb |
<50ppb |
<30ppb |
<25ppb |
<20ppb |
<20ppb |
<10ppb |
<10ppb |
| Total Copper |
<50ppb |
<25ppb |
<20ppb |
<20ppb |
<15ppb |
<15ppb |
<10ppb |
<10ppb |
| Hardness |
<300ppb |
<300ppb |
<200ppb |
<200ppb |
<100ppb |
<50ppb |
-
Not Detectable- |
| pH |
7.5-10.0 |
7.5-10.0 |
7.5-10.0 |
7.5-10.0 |
7.5-10.0 |
8.5-9.5 |
9.0-9.6 |
9.0-9.6 |
Note: These feedwater
guidelines are based on
achieving steam purity required
for superheaters, turbines, or
process restrictions. Many
plants operate outside of these
criteria. For specific
recommendations ask
our water treatment experts.
Boiler Water - ASME
Consensus on Operating Practices
| Drum
Operating Pressure
(psig) |
| Boiler Water |
0-300 |
301-450 |
451-600 |
601-750 |
751-900 |
901-1000 |
1001-1500 |
1501-2000 |
| Silica |
<150ppm |
<90ppm |
<40ppm |
<30ppm |
<20ppm |
<8ppm |
<2ppm |
<1ppm |
| Total
Alkalinity |
<350ppm |
<300ppm |
<250ppm |
<200ppm |
<150ppm |
<100ppm |
--Not
Specified-- |
| Conductivity |
<3500 |
<3000 |
<2500 |
<2000 |
<1500 |
<1000 |
<150 |
<100 |
| Free Hydroxide |
-----------------Not
Specified----------------- |
---Not
Detectable--- |
Note: These Boiler
water guidelines are based on
achieving steam purity required
for superheaters, turbines, or
process restrictions. Many
plants operate outside of these
criteria. For specific
recommendations please ask
our water treatment experts.
|
Information
