Complete Compiled Specification.pdf - Peck Ormsby Construction

Any or all welders may be required to retake welding certification tests at the request of the owner's
representative without additional expense.
When so requested, a welder shall not be permitted to work as a welder on this project until he has been
recertified in accordance with NCWB.
Where piping 1-1/2 inches and smaller is to be butt or socket welded, submit 3 samples of test welds for
approval.
SCREWED CONNECTIONS:
All pipe shall be reamed at the ends and free of all inside scale or burrs. Threads shall be cut clean and sharp,
and to a length equal to 1-l/8 the length of the female thread receiving the pipe. The pipe shall be screwed in the
full length of the female thread.
Pipe joints shall be made tight with teflon thread tape or thread lubricant worked into male thread only. Surplus
material shall be wiped off and the joint left neat and clean. Lubricant shall be powdered graphite and linseed oil,
or plumbage and linseed oil.
MECHANICAL GROOVED PIPING CONNECTIONS: (Heating hot water and chilled water systems only)
When approved by the owner's representative, mechanical grooved pipe couplings and fittings may be used for
piping systems 2-1/2" and above and having operating conditioning not exceeding 230 deg. F. excluding steam
piping, domestic water piping, and any other service not recommended by manufacturer, instead of welded,
flanged or threaded methods, and may also be used as unions, seismic joints, flexible connections, or vibration
reducers.
Couplings shall consist of one of more piece housing, synthetic rubber gasket, with nuts, bolts, locking pin,
locking toggle or lugs to secure unit together. Housing shall be ASTM A-536 ductile cast iron or ASTM A-47
malleable iron, hot dip galvanized or zinc electroplated. Coupling housing shall be painted with alkyd enamel
paint.
Gasket shall be molded of synthetic rubber in a central cavity, pressure-responsive configuration conforming to
the pipe outside diameter and coupling housing. Gasket material shall be selected for the specific service as
recommended by the manufacturer.
Fittings shall be full flow fittings with grooves or shoulders designed to accept grooved end couplings. Standard
fittings shall be ASTM A-536 ductile cast iron or ASTM A-47 malleable iron. Standard steel fittings including
large size elbows (16" - 24"), shall be forged steel conforming to ASTM A-106. Standard segmentally welded
fittings shall be fabricated of Schedule 40 carbon steel pipe.
AWWA cast iron fitting shall be ASTM A-48 Class 30-A gray cast iron or ASTM A-536 ductile cast iron,
conforming to the requirements of AWWA/ANSI C-110.
Outlet fittings for branches, gauges, meters or other specialty items shall be a standard mechanical product.
Fittings for plain end steel pipe shall consist of cast housing with internal pipe stops, quarter turn positive locking
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SEGO LILY ELEMENTARY SCHOOL CLASSROOM ADDTION March 2, 2009
BASIC MATERIALS & METHODS 15050-5