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BBS in a Box 7
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BBS in a Box - Macintosh - Volume VII (BBS in a Box) (January 1993).iso
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Confine.cpt
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CONSAF.STK
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card_6452.txt
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1990-02-06
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5KB
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-- part name: Ex. Permit
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----- text -----
Permits and Procedures
Before entry into a confined space can be allowed it is necessary to ensure a safe environment for
work. This is done by requiring that a confined space entry procedure be followed. In most cases in industry a Vessel Entry or Confined Space Permit
will also be required before entry is allowed.
For safe confined space entry the following items should be checked out in advance.
1. All flanges, connections, or fittings which
deliver raw material or product to/from a vessel
need to be blanked or physically disconnected.
Utility piping delivering nitrogen or steam
must be disconnected.
2. A manyway or means of entry and exit needs to
be opened. Safe egress via ladder, etc, must be
evaluated prior to entry.
3. A test should be made of the air within the
vessel to determine %LEL of flammable
vapors if the vessel previously contained a
flammable or toxic organic material. In some
cases a Draeger tube test may be required to
monitor for extremely toxic materials with TLV's
in the part if %LEL is greater than 10%. A zero
%LEL is desirable. It may be necessary to
provide exhaust ventilation in order to bring
the %LEL to zero. If the atmosphere cannot be
controlled proper respiratory equipment
(i.e. SCBA) and protective clothing can be worn.
4. A test should be made for %Oxygen using a
calibrated and functioning oxygen analyzer (i.e.
Ecotox is one brand available). Entry should
not be made if the atmosphere contains <19.5%
oxygen or >22% oxygen.
5. An approved lifeline and harness should be worn
during entry operations.
6. A standby lifeline assistant should watch over
the operation and have either radio or telephone
contact in the event of an emergency.
7. Electrical equipment such as pumps, agitator
motors, hydraulic rams, etc. must be locked out
in accordance with an approved lockout procedure.
(This is could be another tutorial in itself.)
8. Emergency/standby breathing apparatus must be
available.
9. For entry into railcars/tank trucks. Safety
devices and procedures such as installation of
wheel chocks, derails, and posting a "Men at
Work" blue flag is required.
10. In excavations or pits deeper than four feet
shoring of sides should be used to prevent cave
in or collapse.
A management procedure should be inplace requiring that a PERMIT be signed and authorized by a trained
and knowledgable individual. The formal procedure
would require the completion of a CONFINED SPACE
PERMIT prior to every confined space entry to ensure that all hazards of each indiviual case have
been evaluated. Blanket authorization of confined
space entry should "NEVER" be allowed to occur as even from shift to shift situations and conditions
change. Permits should be reauthorized at shift changes or upon reentry if a significant time period has elapsed.
The Button <Ex. Permits> contains a model permit
which can be studied for confined space entry.