3.1.2.17
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.
3.1.2.18
Strainer Locations
Provide strainers with meshes suitable for the services upstream of each
control valve and where dirt might interfere with the proper operation of
valve parts, orifices, or moving parts of equipment.
3.1.2.19
Dissimilar Piping Materials
Provide dielectric unions or flanges between ferrous and nonferrous piping,
equipment, and fittings, except that bronze valves and fittings may be used
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.
3.1.2.20
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.
3.1.3
Painting
3.1.3.1
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.
3.1.3.2
Other Items
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. Except
zinc-coated and copper pipe, give piping to be insulated, a protective
coating prior to installing insulation.
3.1.3.3
After erecting and testing boilers, clean exposed surfaces of the boiler
normally painted in commercial practice to remove grease, coal dust, flyash
and other foreign matter and finish with one coat of aluminum heat
resisting paint applied to minimum dry film thickness of 0.025 mm one mil.
SECTION 15511N
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