discharge side of the high and medium pressure traps when they are
specifically required. Test connection shall include a 15 mm 1/2 inch
globe valve with open blow.
3.1.3.16
Pressure Gage Installation
Pressure gages shall have a shutoff valve or petcock installed between the
gage and the line, and gage on steam lines shall have a siphon installed
ahead of the gage.
3.1.3.17
Thermometer and Sensing Element Installation
Provide thermometers and thermal sensing elements of control valves, with a
separable socket. Install separable sockets in pipe lines in such a manner
to sense flowing fluid temperature and minimize obstruction to flow.
3.1.3.18
Strainer Locations
Provide strainers with meshes suitable for the services upstream of each
control valve and where dirt might interfere with proper operation of valve
parts, orifices, or moving parts of equipment.
3.1.3.19
Dissimilar Piping Materials
Provide dielectric unions or flanges between ferrous and nonferrous piping,
equipment, and fittings, except that bronze valves and fittings may be
provided without dielectric couplings for ferrous-to-ferrous or
nonferrous-to-nonferrous connections. Dielectric fittings shall utilize a
nonmetallic filler which will prevent current flow from exceeding one
percent of the short circuit current. Spacer shall be suitable for the
pressure and temperature of the service. Fittings shall otherwise be as
specified in this section.
3.1.3.20
Surface Treating, and Pipe Wrapping
Uninsulated steel piping buried in the ground shall have exterior surfaces
protected with a tape wrapping system or a continuously extruded
polyethylene coating system as specified in Section 09974 PROTECTION OF
BURIED STEEL PIPING AND STEEL BULKHEAD TIE RODS.
3.1.4
Painting
Unless specified otherwise, pipe hangers, structural supports, pipe and
pipe fittings, conduit and conduit fittings, air grilles, pipe coverings,
insulation, and metal surfaces associated with mechanical and electrical
equipment including zinc-coated steel ducts shall be painted utilizing the
painting systems as specified in Section 09900 PAINTS AND COATINGS.
Zinc-coated steel duct in unpainted areas shall not be painted. Piping to
be insulated, except zinc-coated and copper pipe, shall be given a
protective coating prior to installing the insulation.
3.1.4.1
Piping, Fittings, and Mechanical and Electrical Equipment
Equipment shall be factory finished to withstand the intended end use
environment in accordance with the specifications for particular end item.
Factory finished equipment on which the finish has been damaged shall
have damaged areas retouched and then be given a complete finish coat to
restore the finish to its original condition. Finish coat shall be
suitable for exposure in the intended end use environment.
SECTION 15502N
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