522 CMR, § 7.03 - Installation
(1) All Air Tanks shall be available for
complete External Inspection, and shall be so installed that there will be not
less than 12 inches between the Air Tank and any floor, wall, ceiling or other
obstruction, except where an Air Tank is attached to a portable compressor by
means of straps and is removable for complete inspection. The 12-inch clearance
may be waived by the District Engineering Inspector who shall document in their
report that there was not a clearance of 12 inches, but that a complete
External and Internal Inspection was made. The name plate, safety valve, drain,
pressure gauge, tank bottom, and inspection openings shall be readily visible
and accessible if the clearance requirement is to be waived.
(2) In case of vertical Air Tanks, the bottom
head if dished shall have the pressure on the concave side to ensure complete
drainage.
(3) Vertical Air Tanks
with a base ring shall have unobstructed access to the Air Tank bottom for
inspection.
(4) Air Tanks in a
fixed installation shall be secured to prevent movement.
(5) Steel or another metallic piping and
fittings shall be used from the Air Tank outlet to the first block valve and on
all vessel penetrations and nozzles.
(6) Air Tanks that can be isolated with block
valves shall have a pressure relief valve attached to the Pressure
Vessel.
(7) Air Tanks that can be
isolated with block valves shall have a pressure gage attached to the Pressure
Vessel per
522 CMR
7.00.
(8)
The connection to the pressure relief valve shall be as short as possible and
not reduced.
(9) The pressure
relief valve shall discharge to a safe location.
(10) The pressure relief valve shall be sized
to relieve the capacity of all compressors which may operate at one
time.
(11) In systems with multiple
Air Tanks, all Air Tanks shall have a safety relief valve which lifts at the
pressure of that Air Tank with the lowest MAWP or other means shall be provided
to prevent pressurizing any Air Tank to a pressure greater than that Air Tank's
MAWP.
(12) Air Tanks shall be
protected from external corrosion.
(13) Automatic drains may be used in addition
to the drain required by
522 CMR
7.00, provided that there is a manual by-pass valve
around the automatic drain so that verification of the automatic drain's
operation can be made.
(14) All Air
Tanks shall be protected by such safety valves and indicating and controlling
devices as will ensure their safe operation. These devices shall be so
constructed, located, and installed that they cannot readily be rendered
inoperative.
Notes
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No prior version found.