FULTON VMP Series - Piping Specifications and Installation

VMP-IOMM-2018-2
Fulton Ltd
Page 20
INSTALLATION - 2
Dissolved Solids: Dissolved solids are salts in the
water that stay in solution. They are invisible to the
naked eye. As the boiler generates steam, dissolved
solids will concentrate. If the concentration becomes
too high, they will precipitate, form a suspended solid,
and concentrate in the vessel. Daily boiler blowdown
is recommended to help prevent the formation of
deposits. Consult Blowdown procedure in the Daily
Maintenance Schedule section of this manual.
Chemical Dosing: In addition to softening the
feedwater, it is also important to consider other factors
such as dissolved oxygen and acidity. Depending
on the results of an analysis, it may be necessary to
inject appropriate amounts of corrective chemical into
the feedwater system. This is usually achieved by
means of a chemical compound solution and variable
output metering pump mounted at the storage vessel.
It is important that the chemicals and quantities are
correct and it is advisable to contact a water treatment
company to arrange a feedwater analysis.
2.8 PIPING SPECIFICATIONS
For piping the basic considerations are: the design temperature, the pressure retained by the
pipe,theuidinthepipe,theloadresultingfromthermalexpansionorcontraction,impactor
shock loads imparted (such as water hammer, external loads, wind loads and vibration from
equipment).
Adhere to the following:
1. The arrangement of the piping and its appurtenances must take into consideration the
location of other structures and equipment adjacent to the piping. The potential for freezing
interference and/or damage as a result of expansion, contraction, vibration, or other
movements must be factored.
2. Valvesareusedinpipingsystemstostopandstarttheowofuids,toregulateow,to
preventbackow,andtorelieveexcessivepressurebuild-upinthepiping.Consideration
should be given to the appropriate location and orientation of valves necessary for safe
operation and isolation of the piping.
3. All piping and piping components used should be suitable for the design temperatures,
pressureanduidusedinthesystem.
4. During the installation, ensure that no dirt, water, or residue from welding is left in the system.
5. Expansion joints or properly designed and sited loops should be provided to accommodate
thermal expansion. Thermal expansion should be calculated using the maximum possible
utilizationuidtemperature,regardlessofwhetherthepipeconsideredisinthefeedorreturn
circuit. Steel pipe will expand approximately 1 mm per meter over 100 °C rise.
6. Supports and anchors must be provided for all pipes, as necessary, to prevent undue stresses
from being placed on equipment, including pumps, valves, and the boiler. Supports and
anchors which will not interfere with thermal expansion should be chosen. The equipment
should never be used or considered as an anchor.
No additional loads should be applied to any factory connection.
7. Gasketsmustbeusedtomakeallangedconnections.Gasketmaterialmustbesuitable
forusewiththepressure,temperaturesanduidsinthesystem.Ensurethatallboltsare
tightened evenly and to the torque recommended values provided by the gasket manufacturer.
8. High point bleeds/air vents are to be installed at all high points in the system piping.
9. All pipes should be installed with a pitch to facilitate draining and venting.