4-3.3 Installation Of Pipe And Fittings; 4-3.4 Installation Of Check Valves; 4-3.5 Installation Of Discharge Nozzles; 4-3.6 Installation Of Pressure Actuation Pipe - Kidde Fire Systems ECS Manual

4-3.3 Installation of Pipe and Fittings
Pipe and fittings must be installed in strict accordance with the system drawings and good
commercial practices. The piping between the cylinder and the nozzles must be the shortest
route possible, with a minimum of fittings. Any deviations in the routing or number of fittings
must be approved by the design engineer before installation.
Note: Strict piping rules regarding flow splits to multiple hazards must be adhered to. Please
refer to Paragraph 4-2.3.2 of this manual for proper tee installations.
Piping must be reamed free of burrs and ridges after cutting, welding or threading. All threaded
joints must conform to ANSI B1-20-1. Joint compound or thread tape must be applied only to
the male threads of the joint, excluding the first two threads. Welding must be in accordance
with Section IX of the ASME Boiler and Pressure Vessel Code. Each pipe section must be
swabbed clean, using a non-flammable organic solvent.
All piping must be blown clear with dry nitrogen or compressed air before installing the
discharge nozzles.
The piping must be securely braced to account for discharge reaction forces and thermal
expansion/contraction. Care must be taken to insure the piping is not subjected to vibration,
mechanical or chemical damage. All hangers must be FM Approved or UL Listed and must
conform to general industry standards for pipe hangers and conform to ANSI B-31.1. Refer to
ANSI B-31.1 for additional bracing requirements.
4-3.4 Installation of Check Valves
Install the check valves as shown on the system drawings. Apply Teflon tape or pipe compound
to all the male threads, except the first two threads. Valves greater than two inches in size are
provided with flanged outlets. All valves must be installed with the arrow on the valve body
pointing in the proper direction of the flow.
4-3.5 Installation of Discharge Nozzles
After the system piping has been blown free of debris, install the discharge nozzles in strict
accordance with the system drawings. Orient the nozzles as shown on drawings. Make certain
that the correct nozzle type, part number and orifice size are installed in the proper location.
See Paragraph 4-2.3.5 for correct nozzle placement and orientation.
4-3.6 Installation of Pressure Actuation Pipe
The pressure actuation pipe must be 1/4-inch Schedule 40 or 80 pipe. The pipe or tubing must
be routed in the most direct manner with a minimum of fittings. Pipe and fittings must be in
accordance with the requirements listed in Paragraph 4-2.5. Fittings can be flared or
compression type. The pressure-temperature ratings of the fitting manufacturer must not be
exceeded.
Piping must be reamed free of burrs and ridges after cutting, threading or flaring. Upon
assembly, pipes must be blown out with dry nitrogen or compressed air. Piping should be
securely braced and isolated from vibration, mechanical or chemical damage.
06-236115-001 4-21
Design and Installation
October 2014