HYDRO-LOGIC INC. - ASME/ABMA Guidelines

RECOMMENDED ABMA & ASME BOILER WATER LIMITS

DRUM OPERATING PRESSURE (psig)
	0-300	301-450	451-600	601-750	751-900	901-1000	1001-1500	1501-2000	OTSG
STEAM
TDS max (ppm)	0.2-1.0	0.2-1.0	0.2-1.0	0.1-0.5	0.1-0.5	0.1-0.5	0.1	0.1	0.05
BOILER WATER
TDS max (ppm)	700-3500	600-3000	500-2500	200-1000	150-750	125-625	100	50	0.05
ALK. max (ppm)	350	300	250	200	150	100	Not Specified	Not Specified	n/a
TSS max (ppm)	15	10	8	3	2	1	1	n/a	n/a
Conductivity max (µmho/cm)	1100-5400	900-4600	800-3800	300-1500	200-1200	200-1000	150	80	0.15-.25
Silica max (ppm SiO2)	150	90	40	30	20	8	2	1	0.02
FEED-WATER (CONDENSATE & MAKEUP, AFTER DEAERATOR)
Dissolved Oxygen (ppm O2)	0.007	0.007	0.007	0.007	0.007	0.007	0.007	0.007	Not Sensitive
Total Iron (ppm Fe)	0.1	0.05	0.03	0.025	0.02	0.02	0.01	0.01	0.01
Total Copper (ppm Cu)	0.05	0.025	0.02	0.02	0.015	0.01	0.01	0.01	0.002
Totak Hardness (ppm CaCO3)	0.3	0.3	0.2	0.2	0.1	0.05	None Detected	None Detected	None Detected
pH @ 25°C	8.3-10.0	8.3-10.0	8.3-10.0	8.3-10.0	8.3-10.0	8.8-9.6	8.8-9.6	8.8-9.6
Nonvolatile TOC (ppm C)	1	1	0.5	0.5	0.5	0.2	0.2	0.2	None Detected
oily Matter (ppm)	1	1	0.5	0.5	0.5	0.2	0.2	0.2
MAKE-UP AT 0.5% BLOWDOWN
TDS	11.4	9.8	8.1	6.5	4.9	3.3	0.5	0.3
Silica (ppm SiO2)	0.75	0.45	0.2	0.15	0.1	0.04	0.01	0.005
MAKE-UP AT 1% BLOWDOWN
TDS	22.8	19.5	16.3	13	9.8	6.5	1	0.7
Silica (ppm SiO2)	1.5	0.9	0.4	0.3	0.2	0.08	0.02	0.01
MAKE-UP AT 2% BLOWDOWN
TDS	45.5	39	32.5	26	19.5	13	2	1.3
Silica (ppm SiO2)	3	1.8	0.8	0.6	0.4	0.16	0.04	0.02
MAKE-UP AT 3% BLOWDOWN
TDS	68.3	58.5	48.8	39	29.3	19.5	3	2
Silica (ppm SiO2)	4.5	2.7	1.2	0.9	0.6	0.24	0.06	0.03