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CASING
SPACERS & END SEALS
APS
Casing Spacers center water and sewer pipes in casings with ease
of installation, are virtually corrosion proof and provide insulating
protection from a possible electrical shorting between the carrier
pipe and casing. No special tools are needed, no grease is used
and they are easily bolted on by a single worker. APS Casing Spacers
eliminate the need to fill the casing annulus with sand which is
extremely labor intensive. Sand in the annulus also acts as an electrolyte
thereby introducing unwanted current to the steel or ductile iron.
With no need for this fill, APS Casing Spacers are your answer to
lower installation costs with continued access for maintenance.
Casing
insulators are used to support and electrically insulate a pipeline
from a casing pipe through which it must pass and are used in river
crossings, canal crossings and bridge crossings as well as highway
and railroad crossings. We recommend installation of polyethylene
casing insulators every 6 to 8 feet.
* NEW FIELD-ADJUSTABLE RUNNERS FOR CASING SPACERS.
APS has recently developed Field-Adjustable Runners for Casing Spacers with 8" wide bands.
FACTS & ADVANTAGES:
Field-adjustable.
Used for easy grade and elevation adjustment of gravity sewer lines.
Lend the ability to stock in-house decreasing inventory up to 75%.
Stock-able spacers will include 10-12 bands up to 24".
Runner sizes from 1" to 6" in 1/2" increments.
STAINLESS
(Model SSI) and CARBON STEEL (Model SI) SPACERS
Heavy duty two piece stainless steel or carbon steel bands by APS
serve virtually every piping application and should be utilized
inside casing that is 2 or 3 pipe sizes larger than the carrier
pipe. APS steel band casing is available in two widths. 8" width
is recommended for carrier pipe 4" to 24". 12" width for carrier
pipes 26" to 120" and larger. The band is constructed of 14 gauge steel
with a 90 mil EPDM liner. Stainless steel spacers are
available in grade 304L. Carbon steel spacers are available with a
thermoplastic powder coating for extra corrosion protection.
INJECTION-MOLDED
POLYETHYLENE SPACERS
Advance casing insulators are manufactured from injection molded
high density virgin polyethylene. Benefits of polyethylene include
high impact strength as well as abrasion resistance. Once installed,
the low friction of polyethylene facilitates easy installation into
the casing. Molded into the inner surface are grooves which prevent
slippage of any carrier pipe coating. The Advance
casing insulators have excellent dielectric resistance and low moisture
absorption which yields minimal electric current loss and no impairment
of cathodic protection. Sizes are available from 1" through
48" with a standard runner height of 1". Casing
insulators from 1" through 12" comprise two halves;
two pi and four pi sections make up 14" and above. Advance
casing insulators are lightweight, economical and easy to install.
Only a screwdriver is required for installation.
CUSTOM
FABRICATION
APS is capable of manufacturing spacers and end seals for specific
customer requirements. Our engineering staff has experience in the
following:
- Placing multiple carriers within one casing
- Positioning thermally insulated pipe without damage to insulation
- Centering small carriers within large casings
- Positioning gravity sewer to on-grade requirements
- Casing spacers for all types and sizes of pipe above 2"
APS
CASING SPACERS: THE RIGHT CHOICE
Advantages:
With proven dependability and ease of installation, Advance Products
and Systems' casing spacers easily outperform the labor intensive,
inefficient and unreliable wood skids. Just check the comparison
below.
- Easily and efficient to install requiring no grease and no special
tools
- Installation by one person
- Slides into place with ease. Coefficient of friction = .1
- Requires no backfill
- Decades of proven reliability
- Insulating
and long term corrosion protection
SKIDS
& STRAPS
-
Difficult to install, cumbersome, time consuming and hard to secure
accurately
- Requires several workers an extended time to position
-
Very resistant to sliding often damaging skids enough to need replacement
before installation is complete
- Requires annulus space filler, such as sand, pea gravel or grout
- High failure rate
- Non-insulating and allows bacteria and differential Oxygen concentration
corrosion
END SEALS
Advance Products & Systems End Seals outperform the costly and
labor intensive brick and mortar method of sealing casing ends.
While soil stress and pipe movement cause mortar to crack, the APS
products move with the pipe, insuring the integrity of the seal.
And, unlike link-type sealing blocks that are limited to carrier/casing
differential and can only be used on a concentric profile, the APS
seals are totally flexible. APS offers four types of end seals which
can accommodate any combination of pipe sizes.
The
model AC and AM are seamless and can easily be pulled on at the
time of construction while the model AW wrap-around is designed
to facilitate installation when the carrier line has already been
welded together and the pull is complete. Simply wrap around the
carrier and casing, remove the release liner from the two pressure
sensitive butyl mastic strips and press the adhesive strips down
to form a seal. Model AZ, zipper type end seal, wraps around the
casing end and carrier pipe and zips shut to provide a tight seal
while still allowing for pipe movement. All four are made of 1/8"
thick synthetic rubber assuring excellent chemical resistance and
resiliency and are secured with T-304 stainless steel banding straps
with a 100% non-magnetic worm gear mechanism to insure the integrity
of the clamp. Only a screwdriver is required for installation.
In addition, Innerlynx forms a mechanical seal between pipelines and
casing. Innerlynx forms a hydrostatic seal and electrically insulate the
carrier pipe from the casing. Innerlynx can be installed by one person
and requires no special tools.
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