Steam Outlet; Water Supply - FULTON VSRT Series Installation And Operation Manual

Steam Outlet

It is recommended to have 30 inch or five pipe diameter
(whichever is greater) of vertical rise out of the steam
outlet. This is considered a good piping practice and
will allow for proper operation.
Steam outlet sizes should not be reduced until after the
steam outlet and at the end of the near boiler piping,
as shown in Figure 13. Steam piping should be sized for
appropriate velocities for the application and pressure.
Steam piping shown in Figure 13 is to be sized for 4,500
ft./min. This piping includes the steam outlet piping
through the outlet of the main steam header. After the
main steam header, distribution piping may be sized for
velocities of 4,000 – 6,000 ft./min. for low pressure steam
(0-30 PSIG), 6,000 – 8,000 ft./min. for medium pressure
steam (30 -75 PSIG), and 8,000 – 12,000 ft./min. for high
pressure steam (75 PSIG and above).

Water Supply

The quality of the water used in the boiler will affect
the life of the pressure vessel (PV). It is strongly
Table 5 - Water Chemistry Requirements for Fulton Boilers
Carbon Steel
Parameter Feedwater
pH 7.5-9.2
Feedwater 140 F (60 C)*
Temperature
Hardness as CaCO < 2ppm
3
Chlorides ---
Total Alkalinity ---
Total Dissolved Solids ---
Suspended Solids No visual turbidity**
Total Organic Carbon No sheen
No foam +
Iron 0.1 ppm and
colorless liquid++
Dissolved Oxygen <1 ppm*
Visual Oil ND
Conductivity (mS/cm) ---
* Feedwater temperatures below 200 F (93 C) will require an oxygen scavenger.
**Suspended solids: Take a water sample. After the sample sits for 10 minutes, no solids should be visible.
+Total Organic Carbon: Take a water sample. Shake vigorously for 30 seconds. No sheen or foam should be visible.
++ Iron: Take a water sample. The upper limit is 0.1 ppm. Hold the sample against a white background. The water should have no visible yellow, red or orange tinge.
ND: None Detected
ppm: parts per million
Questions? Call (315) 298-5121, or visit us online at www.fulton.com
recommended that a competent water treatment
company is consulted prior to the operation of the boiler.
Elements/PV damaged due to adverse water conditions
will not be replaced or repaired under warranty.
Natural feedwater supplies contain hardness, solids and
dissolved gases. These may promote scale, foaming,
corrosion, and/or poor steam quality. To prevent this,
feedwater must be analyzed and treated accordingly.
The treatment should provide quality feedwater to the
boiler such that corrosion and deposition in the boiler
will be minimized.
Thermal cycling, dissolved oxygen, high or low pH can
all be major causes of corrosion. Untreated hardness is
the major cause of scale deposits. Poor quality feedwater
requires increased blowdown and increased chemical
treatment costs to prevent boiler corrosion and scaling.
One way to lower the amount of dissolved gases in
the boiler feed water is to preheat the feedwater. This
option injects live steam into the feedwater to increase
the water temperature to 180 F (82 C) or higher which
removes oxygen and carbon dioxide from the water.
Vertical Boiler
8.5-10.5
---
< 10 ppm
---
< 300 ppm
< 2000 ppm
No visual
turbidity**
No sheen No
foam +
0.1 ppm and
colorless
liquid++
ND
ND
< 2985
INSTALLATION - 2
VSRT_IOM_2018-1213
2-19