418-Tank cleaning Operations / 748
Tan
k
Cleanin
g Op
erations
BOS-PRD-03.900603
4 D
escri
p
tion
4
.1
P
re Tas
k
P
lannin
g
The
Chie
f Off
icer/Tas
k Sup
ervisor
shall
carry out pre-task planning as follows:
x
Raise the Permit to Work (PTW);
x
Review the relevant
“
Material Safety Data Sheet(s) (MSDS)”;
x
Develop or consider the Tank Cleaning Plan;
x
Check the
Tank Cleaning Checklist
;
x
Develop the
Emergency Response Plan
;
x
Prepare the
Tool Box Talk
(TBT).
If Contractors are present on board or embark, they
shall
be fully involved in the pre-task planning.
4
.1.1 The tan
k
cleanin
g p
lan
Among the factors that
shall
be taken into account during the planning stages of tank washing are the following:
x
The construction of the tank walls;
x
The nature of the last cargo; reference MSDS;
x
The washing medium, compatibility, reactivity and health and safety hazards;
x
The cleaning processes to be applied;
x
The appropriate techniques to be employed the time available for cleaning and the nature of the next
cargo to be loaded; reference Company Tank Cleaning Manual and MSDS;
x
The removal of the tank residues;
x
Preparation of the work area.
4
.
2
Wor
k
in
g
in con
f
ine
d
s
p
aces
4
.
2
.1 Isolation
The confined space
shall
be isolated; the lock out/tag out process
shall
be adhered to and if required a blank
flange
shall
be installed.
4
.
2
.
2 Op
enin
g
During the opening of a confined space only the relevant lifting equipment
shall
be used. The crew
shall
stay
out of the line of fire and be aware of the possible release of gas when opening manholes.
4
.
2
.
3 E
ntr
y
Before entry into a confined space the rescue equipment
shall
tested and made ready for use and all
electrical equipment wiring
shall
be carefully inspected. Unserviceable equipment
shall
be replaced or
repaired.
Entry
shall
be made wearing the appropriate PPE including a safety harness with life line. Personal gas
detectors
shall
be carried and used by each person entering the space. Only explosive proof equipment and
lighting
shall
be used and a safety attendant
shall
stand by at the entrance.
Version 04. Original date: 22/06/2012. Version date: 31/12/2014. Valid version only on QMS site. Uncontrolled document when printed.
Procedure prepared by: BOS Deputy QHSE Manager. Approved by: BOS QHSES Manager. Validated by: BOS Quality Representative
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