Fulton Hopkins (HPN) Horizontal Coil Thermal Fluid (hot oil) Heater - Manual (Page 18)

© The Fulton Companies 2014
2-12
INSTALLATION
SECTION 2
!
WARNING
All information in this manual is for
reference and guidance purposes,
and does not substitute for required
professional training, conduct,
and strict adherence to applicable
jurisdictional/professional codes and
regulations.
If a fi re does occur, extinguish using
CO
2
, foam or dry chemical. DO NOT
USE WATER.
4
CAUTION
Some plastics may be dissolved by
thermal fl uid.
pump, should this occur. In applications where it is desirable to design
to pressures lower than 100 psig, an alternative safeguard is to install
appropriately sized safety valves.
7. Where secondary circulating pumps are installed, ensure the system is
suitable for the aggregate head, against a closed valve, of both pumps.
8. During construction of the installation, ensure that no dirt, water, or
residue from welding is left in the system.
9. Consider expansion joints or pipe loops to accommodate thermal
expansion. Design should be per latest edition of ASHRAE Systems and
Equipment Handbook to prevent detrimental forces and stresses at
connected equipment. Thermal expansion should be calculated using the
maximum possible utilization fl uid temperature, regardless of whether the
pipe considered is in the feed or return circuit. Steel pipe will grow axially
and can be expected to expand approximately 1” over 100ft @ 100dg°F
temperature rise (1mm per meter over 100 C rise).
10. Provide properly designed supports and anchors for all piping where
necessary to prevent undue stress from being imparted on equipment
such as pumps, valves and the heater. Care should be taken as end
reactions transmitted to rotating equipment, such as pumps, may deform
the equipment. Therefore equipment manufacturers’ recommendations
on allowable forces and movements should be followed. Ensure all pipe
joints are of either welded or fl anged construction. Screwed joints must be
avoided where possible. In no instance should screwed joints be used in
the fl ow circuit. All fl anges should be welded to the pipe and not screwed.
Depending on the size, fl anges should be 150# or 300# raised face fl anges,
SA105. See Figure 4.
11. Ensure heaters that are skid mounted with pumps and tanks are equipped
with a y-strainer, a fl ex connector and a valve in the inlet run between the
pump and the combination tank. Piping between the discharge of the
pump and the inlet of the heater will include a fl ex connector and a valve.
12. If screwed connections have to be made, e.g., to items of control
equipment, use a thread sealant suitable for use with fl uids at elevated
temperature. Tefl on tape, standard pipe sealant, or hemp and paste are not
acceptable.
13. Cut screw threads carefully and accurately. If possible, new tools should
be used. Threaded connections larger than 1” are not to be used. It is
recommended that GR5 or higher tensile steel bolts be used for all fl anged
joints.
14. Use gaskets to make all fl anged connections. Gasketing material must be
suitable for use with the pressure, temperatures and fl uids in the system.
Flexible graphite gaskets are suited for most applications. Recommended
gasket thickness is 1/10 - 1/8 inch. Ensure that all bolts are tightened
evenly and to the torque recommended values provided by the gasket
manufacturer. Refer to Tables 4 - 7 and Figure 5 for guidelines.