TANKCLEANING
PROCEDURES, ON CHEMICAL TANKERS- CAPT
AJIT VADAKAYIL
Tank
cleaning is usually done with water, unless the cargo ROB in tank creates a
stubborn residue like Isocyanates, in which case a non-reactive solvent must be
used. Isocyantes will form stubborn Urethane and CO2 gas in large quantities
with water.
Esters
and chlorinated HC will slowly hydrolyse
to acids. This is allright in epoxy tanks if the tank cleaning is uninterrupted
at the prewash stage . SS can handle the pH of the acid.
It
is most important to know the next cargo planned to be loaded . Washing to WW
standard after a particular cargo is not as critical.
No
cleaning can take place unless the mandatory prewash as required by MARPOL is
done.
Substances
with high VP can be removed from tank by evaporation, unless they leave a
stubborn residue or contain inhibitors.
The NVM content of the chemical data sheet must be consulted. Any
inhibitor not washed off will be difficult to remove and will have a bad
influence on the next cargo or fail the WWT. Most inhibitors are fully soluble
in water.
The
master must enforce precautions like “ no smoking “ and “ AC on recirc “. It is important for all on a chemical tanker
to know the location of AC fresh air intake, and the Anemometer , to use the
relative wind direction to advantage.
Bioaccumulative vapours and carcinogenic fumes can enter the engine room
via intake vents and cause health problems for the engine staff. It is not all
right to say that just the deck crew are exposed to toxic vapors.
Water
washing can be done even if the solubility of the chemical in water is low to
as much as 0.3%. such solubility always
increases if the water temperature is higher. Hence always try to use wash
water at high temperature ( about 25 deg higher than MP after removing cold ballast
interface ) unless the cargo being cleaned does not allow it, like drying oils
and mineral oils with high paraffin content. Solidified matter when melted flows away with
the stripped out water, it need not be soluble.
Mineral
oils with high paraffin content and certain crude oils which require heating
during transportation should always be cleaned with ambient wash to prevent
evaporation of lighter fractions which would leave a waxy residue on tank
bulkheads.
Drying
oils if prewashed with hot water will polymerize. Drying oils must be washed
immediately after dischg with ambient water. If they are left to dry
polymerization takes place due to reaction with oxygen, and heat increases the
reaction speed. This means by removing the air form the tank using Nitrogen
this process can be slowed down. By the way, Ambient means upto 35 deg C.
Moderate means upto 60 deg. Hot means >60 deg C.
Certain
cargoes like acetic acid, benzene, luboils, caustic soda, paraffin, molasses,
phenol, DINP, fatty alcohols, HMD , Hitec, WPAC, butyl acrylate , creosote
etc can be hot pre-washed.
However
if you hot prewash Styrene monomer or Acrylic acid polymerization will
happen. The hotter the water, the faster
the polymerization. Due to condensation of vapour , inhibitor free liquid is
formed, as the inhibitor is not volatile. Inhibitor if not removed will affect
the PTT test.
When
a cargo is fully soluble in water, using tank cleaning chemicals in a mindless
manner does more harm than good.
Cleaning
the tanks is just not enough. Most often it is the tank appendages which cause
huge cargo claims or tank rejection. PV valves, vent lines, fixed pipelines ,
portable manifold hoses, superstrip lines, sampling and drain cocks, air/
nitrogen/ steam portable connection stubs, pump internals , cofferdams –all can
hold contaminant matter. With certain cargoes like LSHW FO even the butterfly
valve Teflon seals can trap sludge and discolor the next cargo.
Washing
tanks with portable/ fixed Butterworth machines from designated areas may not
clean everything. This is why it is important to enter the tank and have a
visual check before wasting fresh water and expensive tank cleaning chemicals
after high MP cargoes like palm oil fatty acids. As soon as you open the tank
dome you get a general idea of shadow areas.
The chief officer must know if the
tank corrugations are horizontal or vertical. Horizontal corrugations mean that
fixed tank cleaning machines which cannot be given drops are ineffective.
Vertical corrugations mean that the position of the butterworth port is
important.
Some
of the butterworth heaters may not be able to deliver the correct temperature
and pressure in cold winter. In such case use lesser tank cleaning machines to
get more temperature with correct pressure.
If
the previous cargo is strong smelling like Acrylates or Crude Turpentine or
MTBE a smell killer can be used. Gaskets emit smell, hence they must be flushed
with methanol.
STAGES OF TANKCLEANING:--
1) Precleaning
with sea water.
Pre cleaning is different from
MARPOL mandatory Prewash. Tank cleaning machines may have shadow sectors , and
this can be rectified for main wash. Non drying oils and fats can be steamed
before the hot water precleaning.
Pre-cleaning
is the first cleaning step, without cleaning agents in order to remove the majority of product
residue. The cleaning temperature
and
the temperature of the adjacent tanks are
important parameters for successful cleaning. When water is not allowed , pre- cleaning is carried out with a suitable solvent. Pre-cleaning
generally takes several hours and the sooner pre-cleaning is done after discharge, the easier it
is to remove the product residue.
Pre-cleaning is very important, because
it is very difficult to obtain
a satisfactory result following an initial mistake
Do not attempt to use tank cleaning
chemicals unless the cargo clingage is removed.
If cargo is not water soluble or
residues remain , the use of tank cleaning chemicals is justified. If the previous cargo is not water soluble
using a 0.04% detergent wash will be good enough for WW standard ( this is not
WALL WASH ). Graco barrel pump injecting into the tankcleaning line , is the best
as the bottom can be kept stripped and tank cleaning chemical is not
reused. Inject at the rate of 2 litres
chemical per cubic meter of wash water. Discharge
from both sides of the manifold to Annex 2 UW overboard.
Recirc using spider /
octopus will clean dirty areas, but they will also dirty clean areas. Also if the solvent is volatile it will
evaporate. Recirc is more effective after a Graco injection wash. Prevent
static charge dangers. Annex 1 mineral oils which are not soluble in water
requires a emulsifier/ degreaser wash. Handspray with undiluted chemicals is only for local application ,
sufficient contact time must be allowed.
Most
cleaning agents are additives which are used in combination
with
water to improve the
water solubility of the cargo to be cleaned. Only very few cargoes which cannot
be cleaned with water-based systems require
a
non-water-based solvent as a cleaner (sometimes in combination
with an emulsifier).
To neutralize the odor of some
chemicals, the use of an odor remover may be recommended in combination with an emulsifier. For most cargoes a variety of cleaning agents are available.
Cleaning agents must be IMO-approved. Cleaning concentrations,
times and temperatures in the final cleaning steps are recommended in the cleaning
guides to achieve a satisfactory result.
Cleaning generally takes several hours.
This is done with tank cleaning
machines, the main purpose is to get rid of the residues loosened up by the tank
cleaning chemicals.
This is done with tank cleaning
machine using a low throughput, to remove the salt before they dry up . If you
anticipate a delay , as your ship does not have a dedicated FW pump or line prevent
the salt from drying up by steaming, more so on zinc adsorbent porous surface.
Steaming is the introduction of saturated steam into the tank to evaporate volatile
residue (odour removal). The steam will condense on the tank surfaces. The temperature should normally be as
high as possible during steaming. This is enhanced if the adjacent tanks (including ballast tanks) are empty Steaming
removes traces of volatile substances. The steam must hence be allowed to
escape constantly via the PV valve.
If the chloride level of the wash water is too high, the use of steam
for
removal of chloride is often the only feasible option. Clearly the steam quality depends on the construction of the boiler.
If the
steam is used to remove chloride, the wall temperatures should be cool (in
contrast to the evaporation
method described above) – this results in condensation and water film running
down the tank
walls
to
wash
the
chlorides off.
In case of Wall wash , with low
chloride specs, for optimal results the chloride
content of the water
must be less than 0.1 mg/
litre (distilled water, deionized
water, demineralized water by microfiltration).
Strip out the tank and the pump stack. Sometimes it
will be necessary to use a Wilden pump and sponges to save time. Mopping reduces drying time if
there are water pools on the tank bottom. Make sure no lint is left .
While venting please remember that warm moist air
condenses on a cold surface. Ventilation
removes water, moisture and odor,
which is usually done by forced air circulation.
CAPT
AJIT VADAKAYIL
29 YEARS IN COMMAND
..
Hi Sir, i wanted to share some thing i saw yeasterday on TV --
ReplyDeleteTuborg
This beer Brand was being promoted on TV which is owned by the Carlsberg Group.
Clearly, many more Jewish brands are taking over this country from all directions.
------------------------------
Same thing is happening with the TV channels, it has been made compulsory to use SET top boxes, and old TV sets do not support the latest technology.
If you want to watch TV, but new TV's.
It is the same bait and trap technique -- First get them hooked slowly, and then real in the web to make a massive profit.
The only way to survive the web is to destroy the web, and the only one who can destroy the web is.....Kal Bhairava ( Rudra - Shiva the terrifying )
He is the destroyer of the three dark cities -- Judaism, Christianity, and Islam.
The true core is Judaism --because Crypto- Jews control "Christianity" and Islam from within.
If the source is destroyed, then its Echo will be destroyed instantaneously.
Neither Christianity, nor Islam are the true problem -- it is Judaism.
There are many proof's that can completely destroy the "source of all evil", Science is a perfect example too...
ReplyDeleteMany of the constants used in Science and maths are Jewish names which proves that they stole all of our knowledge, and renamed it in their name..
The point is that it is the same old story repeating itself....
There comes a time in the universe when "Asuras" takes favor of "Brahma", and they ask for immortality...
But, Brahma Says that no one can be Immortal in the world of death, however i can make the conditions of your annihilation very difficult.
Using this gift from Brahma, the Asuras cause havoc in the world, and take every thing from the "Devas".
The Devas go to Brahma for help, but Brahma says that they should talk to God Vishnu.
When the devas, go to God Vishnu, he directs them to God Shiva....
The devas go to God Shiva for help...
God Shiva agrees to help, but certain conditions must be met before he can act to defend the people.
Shiva comes in Human form
He forgets who he really is, and he has to remind himself, who he really is and remember the purpose for which he was born....
He has to fulfill those conditions so he can prove himself that he is Shiva, because any one can claim to be Shiva....
Dear Sir,
Do you know what those conditions are....?
hi druv,
ReplyDeleteall religions preach love, fairness and compassion--
--and this includes Christianity, Islam and Judaism.
i have read the bible ( old testament and the new abdridged one ) and the koran.
you should only be against the "middlemen" or "brokers" between man and the gods of these religions, who try to grab power -- the ultimate intoxicant, for their own selfish needs.
these are "prostitutes of the soul"--who have killed millions of human beings on this planet in the name of religion. 90 million hindus have been killed by christianity and islam.
yet our "not so bright" rahul gandhi goes crying to US senators , about hindu terrorism ( wiki leaks ).
if you read my post ( put in google ) PROUD TO BE INDIAN , PROUD TO BE HINDU- VADAKAYIL, openness /oneness and inclusivity --is the essense of hinduism, and you need to be proud of that.
for the vedic rishis had said there are many paths to the final goal.
a true follower of sanatana dharma will NEVER EVER say that his religion is the best-- and he does NOT feel the compulsion to belitte and destroy other faiths.
people all over the world are slowly realising this.
grace and peace!
capt ajit vadakayil
..
Brilliant post!.i love it reading of this excellent post. High pressure cleaning machines and High pressure washer India by all surface pressure cleaning your article has proved your hard work and experience you have got in this field. Really, i like the fact that you made it so easy for people like me to read. Thanks for a wonderful share.
ReplyDeleteSir,
ReplyDeleteKindly advise on procedure for washing for methanol/ last cargo Gasoline.
With special reference to Marpol annex 1
hi cs,
Deletei do NOT take questions of tank cleaning, due to obvious reasons.
however-
wash with emulsifier + surfactant injected into wash water.
steam tanks after FW rinse.-- ventilate.
do wall wash test.
punch into google search-
WALL WASH METHOD CHEMICAL TANKERS VADAKAYIL
capt ajit vadakayil
..
CH
ReplyDeleteOctober 13, 2014 at 6:35 AM
Respected Captain,
What is special about Tamil Nadu?
How come it is able to continuously produce word geniuses like Ramanujam, Subrahmanyan Chandrasekhar, C.V. Raman, A.R. Rahman, Abdul Kalam, Venkatraman Ramakrishnan, Viswanathan Anand, Illayaraja, etc?
Even till recently the Chief Justice of India, the Finance Minister, the RBI governor are all Tamils?
Is there any scientific reason behind this? Because no other region has produced such super genius people in such numbers.
Regards
ReplyDelete
Replies
#####################
Capt. Ajit Vadakayil
October 13, 2014 at 7:06 AM
hi ch,
i am sure if i were a lawyer, i will NEVER EVER become CJI.
i am sure if i were an economist, i will NEVER EVER become finance minister.
you want me to continue ?
when i was on my training ship in mumbai with 250 other cadets ( two years ) -- the biggest TELUs ( oily and slimy ) and SNEAKS ( snitches ) became SCC ( senior cadet captains ) , CC ( cadet captains ) , CL ( cadet leaders ) etc.
i used to be in the CAPTAINS MONTHLY BREAKFAST PARTY ( cadet with maximum negative marks for OFFICER LIKE QUALITIES ) -- to be chewed up for breakfast every month .
i got an EXTRA FIRST in every subject --except OFFICER LIKE QUALITIES.
now what are OFFICER LIKE QUALITIES-
being a son of a bit#h, being a sneak, being a hypocrite, being a as$ kisser , being a leader who will sell out his team, being a back biter, being an informer , being the best in playing to the gallery.
so, so--
at the passing out parade --most of the cadets who got all PRIXES were leaders -- they all got BOOOOOEEEEED !
I remember i got only one prize--for being the best REPORTER IN ENGLISH -- the claps I got from the entire hall still resound in my ears -- along with another ROC ( royal officer cadet -who did NOT care to become a sold out leader ).
and mind you -- i was in every single team which made my TOP ( starboard fore top ) the champion TOP.
i was a champion sailor, rower, signaller, marks in subjects, soccer team in both years --
but i lacked OLQ ( officer like qualities ) of being a FU#KIN' SLIME BALL.
so in my passing our certificate , after two years of training -- i had an EXTRA FIRST in all subjects -- except OLQ where i was third grade
so i guess they held a special meeting and GRACED ME TO FIRST CLASS --a young 18 year old boy -- .TEE HEEE !
AT SEA, THE SAILORS DO NOT CARE FOR YOUR FOUR STRIPES- THEY ONLY CARE FOR WHO YOU ARE--
AT SEA PEOPLE WHO KNOW ME , OR HAVE HEARD OF ME -- OR SAILED WITH ME, WILL VOUCH--
CAPT AJIT VADAKAYIL WAS A SLAVE MORE POWERFUL THAN THE MIGHTY FU#KIN' CAESAR -- BY LIGHT YEARS .
this has now passed on to LORE -- never ti happen again in the annals of sea .
am i boasting ?
-- so be it !
humility is NOT about having a low opinion of yourselves to please the JEALOUS party.
see, this would have been part of my post-- GAMES CAPTAIN PLAYED--
you made me reveal it prematurely --with your TAMIL PRIDE ! TAKE IT EASY !
check out my training ship-
https://www.youtube.com/watch?v=MwpFBPMtnj4
https://www.youtube.com/watch?v=k0BxC3kFET8
capt ajit vadakayil
..
CH
ReplyDeleteOctober 13, 2014 at 6:35 AM
Respected Captain,
What is special about Tamil Nadu?
How come it is able to continuously produce word geniuses like Ramanujam, Subrahmanyan Chandrasekhar, C.V. Raman, A.R. Rahman, Abdul Kalam, Venkatraman Ramakrishnan, Viswanathan Anand, Illayaraja, etc?
Even till recently the Chief Justice of India, the Finance Minister, the RBI governor are all Tamils?
Is there any scientific reason behind this? Because no other region has produced such super genius people in such numbers.
Regards
ReplyDelete
Replies
#####################
Capt. Ajit Vadakayil
October 13, 2014 at 7:06 AM
hi ch,
i am sure if i were a lawyer, i will NEVER EVER become CJI.
i am sure if i were an economist, i will NEVER EVER become finance minister.
you want me to continue ?
when i was on my training ship in mumbai with 250 other cadets ( two years ) -- the biggest TELUs ( oily and slimy ) and SNEAKS ( snitches ) became SCC ( senior cadet captains ) , CC ( cadet captains ) , CL ( cadet leaders ) etc.
i used to be in the CAPTAINS MONTHLY BREAKFAST PARTY ( cadet with maximum negative marks for OFFICER LIKE QUALITIES ) -- to be chewed up for breakfast every month .
i got an EXTRA FIRST in every subject --except OFFICER LIKE QUALITIES.
now what are OFFICER LIKE QUALITIES-
being a son of a bit#h, being a sneak, being a hypocrite, being a as$ kisser , being a leader who will sell out his team, being a back biter, being an informer , being the best in playing to the gallery.
so, so--
at the passing out parade --most of the cadets who got all PRIXES were leaders -- they all got BOOOOOEEEEED !
I remember i got only one prize--for being the best REPORTER IN ENGLISH -- the claps I got from the entire hall still resound in my ears -- along with another ROC ( royal officer cadet -who did NOT care to become a sold out leader ).
and mind you -- i was in every single team which made my TOP ( starboard fore top ) the champion TOP.
i was a champion sailor, rower, signaller, marks in subjects, soccer team in both years --
but i lacked OLQ ( officer like qualities ) of being a FU#KIN' SLIME BALL.
so in my passing our certificate , after two years of training -- i had an EXTRA FIRST in all subjects -- except OLQ where i was third grade
so i guess they held a special meeting and GRACED ME TO FIRST CLASS --a young 18 year old boy -- .TEE HEEE !
AT SEA, THE SAILORS DO NOT CARE FOR YOUR FOUR STRIPES- THEY ONLY CARE FOR WHO YOU ARE--
AT SEA PEOPLE WHO KNOW ME , OR HAVE HEARD OF ME -- OR SAILED WITH ME, WILL VOUCH--
CAPT AJIT VADAKAYIL WAS A SLAVE MORE POWERFUL THAN THE MIGHTY FU#KIN' CAESAR -- BY LIGHT YEARS .
this has now passed on to LORE -- never ti happen again in the annals of sea .
am i boasting ?
-- so be it !
humility is NOT about having a low opinion of yourselves to please the JEALOUS party.
see, this would have been part of my post-- GAMES CAPTAIN PLAYED--
you made me reveal it prematurely --with your TAMIL PRIDE ! TAKE IT EASY !
check out my training ship-
https://www.youtube.com/watch?v=MwpFBPMtnj4
https://www.youtube.com/watch?v=k0BxC3kFET8
capt ajit vadakayil
..
CH
ReplyDeleteOctober 13, 2014 at 6:35 AM
Respected Captain,
What is special about Tamil Nadu?
How come it is able to continuously produce word geniuses like Ramanujam, Subrahmanyan Chandrasekhar, C.V. Raman, A.R. Rahman, Abdul Kalam, Venkatraman Ramakrishnan, Viswanathan Anand, Illayaraja, etc?
Even till recently the Chief Justice of India, the Finance Minister, the RBI governor are all Tamils?
Is there any scientific reason behind this? Because no other region has produced such super genius people in such numbers.
Regards
ReplyDelete
Replies
#####################
Capt. Ajit Vadakayil
October 13, 2014 at 7:06 AM
hi ch,
i am sure if i were a lawyer, i will NEVER EVER become CJI.
i am sure if i were an economist, i will NEVER EVER become finance minister.
you want me to continue ?
when i was on my training ship in mumbai with 250 other cadets ( two years ) -- the biggest TELUs ( oily and slimy ) and SNEAKS ( snitches ) became SCC ( senior cadet captains ) , CC ( cadet captains ) , CL ( cadet leaders ) etc.
i used to be in the CAPTAINS MONTHLY BREAKFAST PARTY ( cadet with maximum negative marks for OFFICER LIKE QUALITIES ) -- to be chewed up for breakfast every month .
i got an EXTRA FIRST in every subject --except OFFICER LIKE QUALITIES.
now what are OFFICER LIKE QUALITIES-
being a son of a bit#h, being a sneak, being a hypocrite, being a as$ kisser , being a leader who will sell out his team, being a back biter, being an informer , being the best in playing to the gallery.
so, so--
at the passing out parade --most of the cadets who got all PRIXES were leaders -- they all got BOOOOOEEEEED !
I remember i got only one prize--for being the best REPORTER IN ENGLISH -- the claps I got from the entire hall still resound in my ears -- along with another ROC ( royal officer cadet -who did NOT care to become a sold out leader ).
and mind you -- i was in every single team which made my TOP ( starboard fore top ) the champion TOP.
i was a champion sailor, rower, signaller, marks in subjects, soccer team in both years --
but i lacked OLQ ( officer like qualities ) of being a FU#KIN' SLIME BALL.
so in my passing our certificate , after two years of training -- i had an EXTRA FIRST in all subjects -- except OLQ where i was third grade
so i guess they held a special meeting and GRACED ME TO FIRST CLASS --a young 18 year old boy -- .TEE HEEE !
AT SEA, THE SAILORS DO NOT CARE FOR YOUR FOUR STRIPES- THEY ONLY CARE FOR WHO YOU ARE--
AT SEA PEOPLE WHO KNOW ME , OR HAVE HEARD OF ME -- OR SAILED WITH ME, WILL VOUCH--
CAPT AJIT VADAKAYIL WAS A SLAVE MORE POWERFUL THAN THE MIGHTY FU#KIN' CAESAR -- BY LIGHT YEARS .
this has now passed on to LORE -- never ti happen again in the annals of sea .
am i boasting ?
-- so be it !
humility is NOT about having a low opinion of yourselves to please the JEALOUS party.
see, this would have been part of my post-- GAMES CAPTAIN PLAYED--
you made me reveal it prematurely --with your TAMIL PRIDE ! TAKE IT EASY !
check out my training ship-
https://www.youtube.com/watch?v=MwpFBPMtnj4
https://www.youtube.com/watch?v=k0BxC3kFET8
capt ajit vadakayil
..
Gud day sir,
ReplyDeleteOne word ur just great.......my qstn is will the same procedure can b used for tank cleaning after discharging phosphoruc acid .....wat additional steps have to be taken
hi mv,
Deletehttp://ajitvadakayil.blogspot.in/2010/11/phosphoric-acid-on-chemical-tankers.html
capt ajit vadakayil
..
Hi Capt. I read a lot from your blog especially when i'm searching over the net for chemical tanker operations. Could you please post on a list of safety precautions prior to and during tank cleaning in port.
ReplyDeleteThanks. Glinus Dmello
hi g,
Deletehttp://ajitvadakayil.blogspot.in/2010/12/chemical-tankers-tank-cleaning.html
capt ajit vadakayil
..
Sir can I get a link on sketch of a ramp door on a ro ro vsl
ReplyDeletehttp://www.ship-yacht-engineering.com/products-solutions.html
DeleteCapt.
ReplyDeleteWhat is the regulation dealing with previous cargoes on a chemical tanker
or banned cargoes
for example: is it acceptable to load food grade sulphuric acid
after the last cargo being a heavy oil
Capt
ReplyDeleteWhat is the regulation on a chemical tanker
or is it permissible to load a HFO over 0.995g/cm3
and have the next cargo a food grade sulfuric acid for example
is there a table which shows
Annex 1 and annex II type cargoes
file:///C:/Users/win7/Downloads/FOSFA%20Acceptable%20Previous%20Cargoes%20List.pdf
Deletehttp://ajitvadakayil.blogspot.in/2010/11/vegetable-oils-and-fats-on-chemical.html
good day sir,
ReplyDeleteis that possible to clean cargo tanks by vetilating after gasoline so if it high volatile grade?
thanks.
good day sir,
ReplyDeleteis that possible to clean cargo tanks by vetilating after gasoline so if it high volatile grade?
thanks.
Dear Ajit Paaji,
ReplyDeleteEmbarking on a new journey.
Pl bless us!
Best Wishes,
DKB
good day sir,
ReplyDeleteis that possible to clean cargo tanks by vetilating after gasoline so if it high volatile grade?
thanks.
depends on next cargo
Deletewash tanks after gasolene
thanks sir
DeleteI mean is it acceptable by marpol because ventilating is not mencioned on p&a booklets as clenaning procedure for annex 1 cargoes.
my concern is if it is vıolation to marpol because there will not be slop after ventilation however tanks will be fully dry and clean
thanks again
best regards
http://ajitvadakayil.blogspot.in/2010/12/epoxy-zinc-tanks-practical-aspects-on.html
Deletehttp://ajitvadakayil.blogspot.in/2010/06/epoxy-tank-coating-on-chemical-tankers.html
If CH is not nil/satisfactory level after tank cleaning, what will be the best way to clean the tank to make CH nil.
ReplyDeleteSame asking for Cloride and PTT.
Thanks & b'rgds
Ezaz
Good evening sir
ReplyDeleteCan you please post procedure for epoxy and zink tank cleaning after palm oil discharge and outcome as Methanol standard.
Thanks and Best Regards Sanjay
Greetings Captain Vadakayil!
ReplyDeleteI happened upon your post searching for information about effectively washing a 1,000 gallon plastic tank that has been used to contain magnesium chloride. (I considered this 1,000 gallon tank as large prior to running across you post!) Although the information you generously share holds no immediate practical value for me, I enjoyed the reading and I am certain that the opportunity to relate to a previously unknown facet of your role as a captain can offer nothing other than invaluable benefit towards my personal growth and understanding of people as a whole. These things have never even crossed my mind before. They are clearly a massive responsibility for you and thousands of others. Your confident command of such a wide scope of knowledge is both impressive and intimidating. Knowing that your position requires uncompromised expertise across a vast array of subjects is daunting. The emphasis you place on the importance of safeguarding the health of a handful of crew members reveals a level of integrity to which all men should be exposed. I would question the motives of any man who fails to acknowledge the unquestionable benefit of your influence. You truly do hold the power to rewrite history. A brief moment of exposure has already made a very positive impact upon me. Thank you captain. I feel fortunate for stumbling across such a potent source of truth, compassion and understanding. I am both humbled and inspired. All for now. Sincerely, Andy Pascoe