2.13.3.2
Pipe Sleeves for Conduit Penetrations
A modular mechanical type sealing assembly will be used between the valve
manhole pipe sleeve and the [conduit casing] [or] [uninsulated chilled
water pipe]. The mechanical seal shall consist of interlocking elastomeric
links shaped to continuously fill the annular space between the [casing]
[or] [uninsulated chilled water pipe] and sleeve. The link material shall
be a synthetic elastomeric capable of withstanding long term exposure at
205 degrees C 400 degrees F without deterioration. The links shall be
attached to each other with corrosion resistant steel bolts, nuts and
pressure plates. The link, bolts, nuts and pressure plates shall be the
product of single manufacturer and shall be furnished as the product of
single manufacturer and shall be furnished as a package or kit. The links
shall be loosely assembled with bolts to form a continuous rubber belt
around the [casing] [or] [uninsulated chilled water pipe] with a pressure
plate under each bolt head and each nut. After the seal assembly is
properly positioned in the sleeve, tightening of the bolt shall cause the
rubber sealing elements to expand and provide a watertight seal between the
[casing] [or] [the uninsulated chilled water pipe] and the sleeve. The
pipe sleeve diameter shall be sized so that no more than one half of the
seal assembly's expansion capability is used to achieve a water seal.
2.13.4
Pipe Supports
Pipe Supports shall be in accordance with MSS SP-58 and MSS SP-69, type as
shown. All pipe supports, including structural cross support members,
shall be galvanized in accordance with Section [05500A MISCELLANEOUS METAL]
[05500N METAL FABRICATIONS]. Chains, straps, or single point supports
shall not be used.
2.14
EXPANSION JOINTS
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NOTE: Expansion joints generally will not be used
in the design of the piping layout. If no other
method is available to handle the expansion problem
in a specific location, the design layout using an
expansion joint at a specific location must be
justified by a design analysis and approved in the
planning phase of the piping layout, prior to
including expansion joints in the specifications.
Cold spring (pipe expansion) will be shown on the
drawings. Sizing of expansion loops and bends will
not be based on cold spring.
If expansion joints or ball joints are required, the
locations will be indicated on the drawings. Since
expansion joints are high maintenance items, they
must be located in a readily accessible location.
Type I and III slip joint, packed expansion joints
are adjustable gland type and require continuing
maintenance to contain leakage and are now
manufactured by only one company making them
proprietary. For these reasons, these types are not
specified.
Coordinate this paragraph with paragraph PIPING in
PART 3; remove this whole paragraph or subparagraphs
not required in the project.
SECTION 02560
Page 22
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