103 kPa (gage) 15 psig but tin-lead (50/50) solder is not acceptable for
joints.
3.1.2.5
Sleeves
Provide pipe sleeves where pipes and tubing pass through masonry and
concrete walls, floors, and partitions. Space between pipe, tubing, or
insulation and the sleeve shall be not less than 6 mm 1/4 inch. Hold
sleeves securely in proper position and location before and during
construction. Sleeves shall be of sufficient length to pass through entire
thickness of walls, partitions, and slabs. Sleeves in floor slabs shall
extend 15 mm 1/2 inch above the finished floor. Firmly pack space between
pipe or tubing and the sleeve with oakum and caulk on both ends of the
sleeve with elastic cement.
3.1.2.6
Flashing for Buildings
Where pipes pass through building roofs and outside walls, provide proper
flashing and counter flashing and make tight and waterproof.
3.1.2.7
Outlets for Future Connections
Locate as directed capped or plugged outlets for connections to future
equipment, when not located exactly by the project drawings.
3.1.2.8
Screwed Joints in Piping
Provide teflon tape or suitable pipe joint compound applied to male threads
only for making up screwed joints. Piping shall be free from fins and
burrs. Ream or file out pipe ends to size of bore, and remove chips.
3.1.2.9
Welds and Welded Joints
Weld joints in piping by the metal-arc or gas welding processes in
accordance with ASME B31.1. Number or mark each weld to identify the work
done by each welder on welds which stress relieving or radiographic
inspection is required.
a.
Recertification: The Contracting Officer reserves the right to
require the Contractor to provide re-examination and
b.
Radiographic testing of circumferential butt welded joints of pipe
with operating temperature of 177 degrees C 350 degrees F and
above shall be required on ten percent of the joints, the location
of which will be determined by the Contracting Officer; when more
than ten percent of the radiographically tested joints show
unacceptable defects radiographically test joints of this type
piping.
c.
Equipment and Protection: Items of equipment for welding shall be
so designed and manufactured, and be in such condition as to
enable qualified operators to follow procedures and to attain the
results specified. Protect welders and gas cutters from the light
of the arc and flame by approved goggles, shields, helmets, and
gloves. Replace cover glasses in helmets and shields when they
become sufficiently marred to impair the operator's vision. Take
care to avoid risk of explosion and fire when welding and gas
SECTION 15511N
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