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FIRE PROTECTION INC.
DESIGN AND INSTALLATION OF FIRE PROTECTION SYSTEMS
P. O. Box 40 • 15218 N. E. Capka Road • Brush Prairie Washington 98606 • (360) 256 -2816 • FAX (360) 256 -2817
FAX TRANSMITTAL COVER SHEET
TRANSMISSION TO: (NAME) BRIAN BLAYLOCK
(COMPANY) CITY OF TIGARD
(FAX NUMBER) ( 503) 624 -3681
TRANSMISSION FROM: (NAME) REED HAMANN
REGARDING: OAK TREE APARTMENTS
DATE: 1 -4 -05
NUMBER OF PAGES: 5
* Should you receive an incomplete transmission, please call (360) 256 -2816. Thank you.
MESSAGE:
ATTACHED IS THE CPVC MATERIAL DATA AND A DETAIL SHOWING THE
UNDERGROUND THAT WILL BE INSTALLED UNDER THE BREEZEWAYS AT THE
OAK TREE APARTMENTS. PLEASE LET US KNOW WHEN YOU HAVE HAD A
CHANCE TO REVIEW TI-US AS WE WILL NEED TO COMPLETE THE WORK ASAP
WE THANK YOU FOR YOUR COOPERATION. A COMPLETE FIRE SPRINKLER
SYSTEM DESIGN SUBMITTAL FOR ALL BUILDINGS WILL FOLLOW SOON.
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010
Underground Fire Service
Harvel CPVC Fire Sprinkler Products are UL Listed and C-
UL Listed for use in underground water service when
installation is in accordance with:
• ASTM D2774, Standard Recommended Practice for
Underground Installation of Thermoplastic Pressure Piping,
• ASTM F645, Standard Guide For Selection Design and
Installation of Thermoplastic Water Pressure Piping Systems,
• HARVEL Plastics Inc.'s procedures
• Installation of private fire service mains and their appurtenances,
NFPA 24.
The general installation procedure detailed here applies to CPVC
Fire Sprinkler pressure pipe that has solvent cement joints in size
range 3/4 " -3 ".
Inspection: Before installation, CPVC Products should be
thoroughly inspected for cuts, scratches, gouges or split ends
which may have occurred to the products during shipping and
handling.
Trenching: The trench should be of adequate width to allow
convenient installation, while at the same time being as narrow as
possible. Minimum trench widths may be utilized by joining pipe
outside of the trench and lowering it into the trench after adequate
joint strength has been achieved. (NOTE: Refer to manufacturer's
instructions for recommended set and cure time for solvent cement
joints.) Trench widths will have to be wider where pipe is joined
in the trench or where thermal expansion and contraction is a factor.
See "Snaking of Pipe" on the next page.
• Water filled pipe should he buried at least 12" below the
maximum expected frost line.
Pipe Size Trench Width Light Traffic Heavy Traffic
Ground Cover Ground Cover
Minimum Minimum
3" and under 8" 12 " -18" 30 " -36"
• It is recommended that thermoplastic piping be run within a
metal or concrete casing when it is installed beneath surfaces
that are subject to heavyweight or constant traffic such as
roadways and railroad tracks.
The trench bottom should be continuous, relatively smooth and
free of rocks. Where ledge rock, hardpan or boulders are
encountered, it is necessary to pad the trench bottom using a
minimum of four (4) inches of tamped earth or sand beneath the
pipe as a cushion and for protection of the pipe from damage.
Sufficient cover must be maintained to keep external stress levels
below acceptable design stress. Reliability and safety of service is
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of major importance in determining minimum cover. Local, state
and national codes may also govern.
Snaking of Pipe: After CPVC pipe has been solvent welded, it
is advisable to snake the pipe according to the following
recommendations beside the trench during its required drying
time. BE ESPECIALLY CAREFUL NOT TO APPLY ANY
STRESS THAT WILL DISTURB THE UNDRIED JOINT:
This snaking is necessary in order to allow for any anticipated
thermal contraction that will take place in the newly joined
pipeline.
Snaking is particularly necessary on the lengths that have been
solvent welded during the late afternoon or a hot summer's day,
because their drying time will extend through the cool of the
night when thermal contraction of the pipe could stress the joints
to the point of pull out. This snaking is also especially necessary
with pipe that is laid in its trench (necessitating wider trenches
than recommended) and is bacUlled with cool earth before the
joints are thoroughly dry.
Loop Offset in Inches for Contraction:
PIPE
OFFSET
T I OFFSET
LOOP LENGTH
2 LOOPLENGTHS
Maximum Temperature Variation, /F,
Between Time of Solvent Welding and Final Use
Loop 10Y 20T 30Y 40Y 50T 60T 70T BOY 907 1007
Length
LOOP OFFSET
20 Feet 3" 4" 5" 5" 6" 6" 7" 7" 8" 8"
50 Feet 7" 9" 11" 13" 14" 16" 17" 18" 19" 20"
100 Feet 13" 18" 22" 26" 29" 32" 35" 37" 40" 42"
Backflling: NOTE: If possible, underground pipe should be
thoroughly inspected and tested for leaks prior to backfilling.
Ideally, backfilling should only be done early in the morning
during hot weather when the line is fully contracted and there is
no chance of insufficiently dried joints being subject to contraction
stresses.
The pipe should be uniformly and continuously supported over
its entire length on firm, stable material. Blocking should not be
used to change pipe grade or to intermittently support pipe across
excavated sections.
Pipe is installed in a wide range of subsoils. These soils should
not only be stable but applied in such a manner so as to physically
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.tan 04 05 09:40a H Tech 360 256 2817 p, g
shield the pipe from damage. Attention should be given to local
pipe laying experience which may indicate particular pipe bedding
problems.
Backfill materials free of rocks with a particle size of 1/2" or less
should be used to surround the pipe with 6" or 8" of cover. It
should be placed in layers. Each soil layer should be sufficiently
compacted to uniformly develop lateral passive soil forces during
the backfill operation. It may be advisable to have the pipe under
pressure, 15 to 25 psi during the backfilling.
Vibratory methods are preferred when compacting sand or gravels.
Best results are obtained when the soils are in a nearly saturated
condition. Where water flooding is used, the initial backfill should
be sufficient to insure complete coverage of the pipe. Additional
material should not be added until the water flooded backfill is firm
enough to walk on. Care should be taken to avoid floating the pipe.
Sand and gravel containing a significant proportion of fine- grained
material, such as silt and clay, should be compacted by hand or,
preferably by mechanical tamper.
The remainder of the backfill should be placed and spread in
uniform layers in such a manner to fill the trench completely so
that there will be no unfilled spaces under or about rocks or lumps
of earth in the backfill. Large or sharp rocks, frozen clods and
other debris greater than 3" in diameter should be removed.
Rolling equipment or heavy tampers should only be used to
consolidate the final backfill.
Maintenance: Shall be in accordance with the Standard for
Inspection, Testing and Maintenance or Water Based Extinguishing
Systems as defined by NFPA 25.
Handling and Storage
HARVEL CPVC Fire Sprinkler Products are tough and corrosion
resistant, but do not have the mechanical strength of steel.
Reasonable care should be exercised in handling HARVEL CPVC
Fire Sprinkler Products. They must not be dropped or have objects
dropped on them. If improper handling results in scratches, splits
or gouges, the damaged section shall be cut out and discarded.
HARVEL CPVC Fire Sprinkler pipe must be covered with a non -
transparent material when stored out of doors. Brief exposure to
direct sunlight on the job site may result in color fade but will
not affect physical properties. CPVC Fire Sprinkler fittings can
be stored in their original containers to keep them free from dirt
and reduce the possibility of damage.
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