2.4.2
Fittings and Gaskets
Fittings shall be ductile iron conforming to AWWA C110. Gaskets shall be
suitable in design and size for the pipe with which such gaskets are to be
used. Gaskets for ductile iron pipe joints shall conform to AWWA C111.
2.4.3
Gate Valve and Indicator Posts
**************************************************************************
NOTE: This paragraph will be deleted if underground
valves are either not required or are specified
elsewhere.
**************************************************************************
Gate valves for underground installation shall be of the inside screw type
with counter-clockwise rotation to open. Where indicating type valves are
shown or required, indicating valves shall be gate valves with an approved
indicator post of a length to permit the top of the post to be located 900
mm 3 feet above finished grade. Gate valves and indicator posts shall be
listed in UL Fire Prot Dir or FM P7825a and FM P7825b.
2.5
ABOVEGROUND PIPING COMPONENTS
2.5.1
Steel Pipe
Except as modified herein, steel pipe shall be galvanized conforming to the
applicable requirements of NFPA 13, and ASTM A 795/A 795M, ASTM A 53/A 53M,
or ASTM A 135. Pipe in which threads or grooves are cut shall be Schedule
40 or shall be listed by Underwriters' Laboratories to have a corrosion
resistance ratio (CRR) of 1.0 or greater after threads or grooves are cut.
Pipe shall be marked with the name of the manufacturer, kind of pipe, and
ASTM designation.
2.5.2
Fittings for Non-Grooved Steel Pipe
Fittings shall be galvanized steel conforming to ASME B16.9 or ASME B16.11.
Fittings that sprinklers, drop nipples or riser nipples (sprigs) are
screwed into shall be threaded type. Plain-end fittings with mechanical
couplings, fittings that use steel gripping devices to bite into the pipe
and segmented welded fittings shall not be used.
2.5.3
Grooved Mechanical Joints and Fittings
Joints and fittings shall be designed for not less than 1200 kPa 175 psi
service and shall be the product of the same manufacturer; segmented welded
fittings shall not be used. Fitting and coupling houses shall be malleable
iron conforming to ASTM A 47/A 47M, Grade 32510; ductile iron conforming to
ASTM A 536, Grade 65-45-12. Gaskets shall be of silicon compound and
approved for dry fire protection systems. Gasket shall be the flush type
that fills the entire cavity between the fitting and the pipe. Nuts and
bolts shall be heat-treated steel conforming to ASTM A 183 and shall be
cadmium plated or zinc electroplated.
2.5.4
Flanges
Flanges shall conform to NFPA 13 and ASME B16.1. Gaskets shall be
non-asbestos compressed material in accordance with ASME B16.21, 1.6 mm
(1/16 inch) 1/16 inch thick, and full face or self-centering flat ring type.
SECTION 13945A
Page 19
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