mechanism (pneumatic or electric), ASME safety relief valve [one] [two],
pressure gage, [manhole] [handholes], chemical feed, and vent; internal
water separator welded to shell at steam exit. The steam producer shall be
designed in accordance with ASME BPVC SEC VIII D1, and carry the code stamp.
PART 3
EXECUTION
3.1
INSTALLATION
Arrange work in a neat
and orderly manner so that minimum storage of
equipment and material
is required at the project site. All parts shall be
readily accessible for
inspection, repair, and renewal. Protect material
and equipment from the
weather.
3.2
PIPING
Unless specifically stated to the contrary, fabrication, assembly, welding,
soldering, and brazing shall conform to ASME B31.1 for all piping of the
hot water system. All piping shall follow the general arrangement shown;
cut accurately to measurements established for the work by the Contractor,
and work into place without springing or forcing, except where
cold-springing is specified. Install piping within buildings entirely out
of the way of lighting fixtures and doors, windows, and other openings. Run
overhead piping in buildings in the most inconspicuous positions. Provide
adequate clearances from walls, ceilings, and floors to permit the welding
of joints; at least 150 mm 6 inches for pipe sizes 100 mm 4 inches and less,
254 mm 10 inches for pipe sizes over 100 mm 4 inches, and in corners
provide sufficient clearance to permit the welder to work between the pipe
and one wall. Make provision for expansion and contraction of pipe lines.
Make changes in size of water lines with reducing fittings. Do not bury,
conceal, or insulate piping until it has been inspected, tested, and
approved. Protect materials and equipment from the weather. Do not run
piping concealed in walls or partitions or underground or under the floor
except as otherwise indicated. Where pipe passes through building
structure, do not conceal pipe joints but locate where they may be readily
inspected. Run all pipe to be insulated as shown and as required with
sufficient clearance to permit application of insulation. Use flanged
joints only where necessary for normal maintenance and where required to
match valves. Provide gaskets, packing, and thread compounds suitable for
the service. Use long radius ells wherever possible to reduce pressure
drops. Pipe bends in lieu of welding fittings may be used where space
permits. Pipe bends shall have a uniform radius of at least five times the
pipe diameter and must be free from any appreciable flattening, wrinkling,
or thinning of the pipe. Changes in direction may be made by bending of
pipe provided that a hydraulic pipe bender is used. Pipe to be bent shall
be steel conforming to ASTM A 53, Class required to match adjoining pipe.
Bent pipe showing kinks, wrinkles, or malformations will not be acceptable.
Do not use mitering of pipe to form elbows, notching straight runs to form
full sized tees, or any similar construction. Make all branch connections
with welding tees except factory made forged welding branch outlets or
nozzles having integral reinforcements conforming to ASME B31.1. Open ends
of pipe lines and equipment shall be properly capped or plugged during
installation to keep dirt and other foreign matter out of the system. Pipe
not otherwise specified shall be uncoated.
3.2.1
Branch Connections
Branches from supply and return mains shall be taken off as indicated or as
approved. Connections shall be carefully made to ensure unrestricted
SECTION 15184N
Page 15
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