3.5.5
Solder or Brazed Joints
Joints in metallic tubing and fittings shall be made with materials and
procedures recommended by the tubing supplier. Joints shall be brazed with
material having a melting point above 538 degrees C 1000 degrees F.
Brazing alloys shall not contain phosphorous.
3.5.6
Joining Thermoplastic or Fiberglass to Metallic Piping or Tubing
When compression type mechanical joints are used, the gasket material in
the fittings shall be compatible with the plastic piping and with the gas
in the system. An internal tubular rigid stiffener shall be used in
conjunction with the fitting, and the stiffener shall be flush with end of
the pipe or tubing and shall extend at least to the outside end of the
compression fitting when installed. The stiffener shall be free of rough
or sharp edges and shall not be a force fit in the plastic. A split
tubular stiffener shall not be used.
3.6
PIPE SLEEVES
Pipes passing through concrete or masonry walls or concrete floors or roofs
shall be provided with pipe sleeves fitted into place at the time of
construction. Sleeves shall not be installed in structural members except
where indicated or approved. All rectangular and square openings shall be
as detailed. Each sleeve shall extend through its respective wall, floor
or roof, and shall be cut flush with each surface, except in mechanical
room floors not located on grade where clamping flanges or riser pipe
clamps are used. Sleeves in mechanical room floors above grade shall
extend at least 100 mm 4 inches above finish floor. Unless otherwise
indicated, sleeves shall be large enough to provide a minimum clearance of
6.4 mm 1/4 inch all around the pipe. Sleeves in bearing walls,
waterproofing membrane floors, and wet areas shall be steel pipe. Sleeves
in nonbearing walls, floors, or ceilings may be steel pipe, galvanized
sheet metal with lock-type longitudinal seam, or moisture-resistant fiber
or plastic. For penetrations of fire walls, fire partitions and floors
which are not on grade, the annular space between the pipe and sleeve shall
be sealed with firestopping material and sealant that meet the requirement
of Section 07840 FIRESTOPPING.
3.7
PIPES PENETRATING WATERPROOFING MEMBRANES
Pipes penetrating waterproofing membranes shall be installed as specified
in Section 15400A PLUMBING, GENERAL PURPOSE.
3.8
FIRE SEAL
Penetrations of fire rated partitions, walls and floors shall be in
accordance with Section 07840 FIRESTOPPING.
3.9
ESCUTCHEONS
Escutcheons shall be provided for all finished surfaces where gas piping
passes through floors, walls, or ceilings except in boiler, utility, or
equipment rooms.
3.10
SPECIAL REQUIREMENTS
Drips, grading of the lines, freeze protection, and branch outlet locations
shall be as shown and shall conform to the requirements of NFPA 54.
SECTION 15190A
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