SECTION 4 – SYSTEM INSTALLATION
Page 12 of 21 Fike Clean Agent System w/ FM-200™ UL / ULC Ex4623
Revision Date: January, 2010 Manual P/N: 06-215 (Rev G) FM 3010715
Fitting materials must conform to the requirements as outlined in NFPA 2001, latest edition. In general, Class 300
malleable or ductile iron fittings are acceptable through 3” NPT sizes. 1000 lb. ductile or forged steel fittings are
required for all sizes greater than 3” NPT. Class 300 flanged fittings are acceptable for all pipe sizes.
All grooved fittings must be UL Listed and conform to the pressure requirements outlined in NFPA 2001, latest
edition. Cast Iron fittings are NOT acceptable.
4.4.1 PIPE SIZE CHANGES
Pipe size changes, to increase or decrease the size, can be done at three different locations in the piping
network:
• At a tee,
• At an elbow,
• At a coupling
4.4.1.1 PIPE SIZE CHANGE AT A TEE:
When the change in pipe size is done at a tee, this is accomplished by using either a reducing tee or a standard
tee and reducing fittings. All reducers must be concentric bell reducers or concentric reducing couplings.
4.4.1.2 PIPE SIZE CHANGE AT AN ELBOW:
When the change in pipe size is done at an elbow, this is accomplished by using either reducing elbows or a
standard elbow with concentric bell reducers or concentric reducing couplings.
4.4.1.3 PIPE SIZE CHANGE AT A COUPLING:
When the change in pipe size accomplished at a coupling, only concentric bell reducers or concentric reducing
couplings can be used.
NOTE: Reducing bushings, weld-o-let, and hole-cut fittings “ARE NOT” acceptable.
4.4.2 INSTALLING MAIN DISCHARGE PIPING
Each pipe section shall be cleaned internally before installation with a nonflammable cleaner such as
Perchlorethylene in accordance with NFPA 2001, latest edition.
Teflon tape or joint compound shall be used on all threaded joints. All grooved coupling gaskets shall be
lubricated per the manufacturer's specifications.
The piping system should be securely supported with due allowance for agent thrust forces, thermal expansion,
and contraction, and should not be subject to mechanical, chemical, vibration, or other damage.
The maximum horizontal spacing for screwed, welded or grooved pipe are as indicated on the following table:
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