Thursday, December 9, 2010

ANNEX1 OIL PRODUCTS ON STAINLESS STEEL CHEMICAL TANKERS-- CAPT AJIT VADAKAYIL

                           
CPP IN STAINLESS STEEL CHEMICAL TANKERS


SS chemical tankers are increasingly being used in the CPP trade. It has the following advantages---

No need to vent after Gasoline to desorb soft epoxy coating.

Extra tank cleaning is avoided.

Small full tanks mean less vapour growth due to sloshing and cargo loss due to higher PV valve settings OF +2000 mm Aq or more.

No contamination claims as all tanks have their own lines.

Flexibility in loading and discharging, no stress problems in harbour condition.

Less ROB in sump after discharging.

No salt water can be used used in SS tanks for bottom flushing , hence no fear of chloride contamination.

No IG soot, so the empty tank after dischg can be inspected better without entry as there is no IG fog

NBR seats of butterfly valves can be eaten up by gasoline in one voyage —on SS chemical tankers the valves have Teflon seats.

More than 20 tanks ( each with its own manifold discharge pipe) --hence commingling clause avoided on B/Ladings , in case of many shippers and consignees.

SS ships have Nitrogen plants--hence NO soot contamination.
                                  
AVTAG or JP4 has Gasoline base and a FP of <23C
AVTUR , JET A-1 , JP-5 has Kerosene base and FP>38C
A Naphtha is sour is its Mercaptan level is >100 ppm and H2S level>10 ppm. Aviation fuels must not be loaded after sour cargo.

LEAD:

For many cargoes including Molasses the last 3 cargoes must be lead free. Be attentive about lead content, if it is not declared in Gasoline ask for it.

Unavoidable pipeline admixture between Avgas and Mogas , in case of single connection and line, should be from a higher to lower octane number—to preserve the quality of the higher grade.

When mixing 14% nitric acid—add acid to water inside tank. 

Lead in leaded dyes is completely soluble in Nitric acid.  
Suitable chemicals are:
Leadclean CP (spraying method).
Bufferclean Ph 5.5 Vecom.(Recirculation method).
Toluene and Xylene are also good solvents of lead.

Many grades of gasoline contain minute quantities of the toxic lead compounds, Tetry-Ethyl-Lead (TEL) and Tetry-Methyl-Lead (TML). Organic compounds of lead, in liquid, solid or vapor form, are highly poisonous to any living form.

Lead can be detected very easily in a lab test by change of colour, so do not take chances.

            Gasolenes contain dyes  will turn a methanol wall wash to a pinkish color. It is very important that the dye is removed prior to loading subsequent cargo(es), since with time the dye is harder to remove. The dye can be removed by recirculating an oxidizer solution.

JET FUEL:

A SS chemical tanker carried BIODIESEL/ vegetable oil, and on the next voyage Jet A1, for the US air force , a cargo which is highly sensitive to contamination. As per the charterers instructions only a nominal wash was given. The outturn samples failed . It must be remembered that all modern fighter jets have microfilters which get choked. Vegetable oil is particularly liable to cause contamination since it is very difficult to remove it completely from tanks and piping. Contamination claims are usually huge and it also spoils the image of the company with the P&I and the cargo interests.

Hot washing will not always remove residues of a solidifying cargo. Often operators load an intermediate cargo to clean the tanks which is not susceptible to contamination and which will act as a solvent. In the above case an intermediate cargo such as gas oil should have been carried. Remember the buck stops at the Masters table.

It is a golden rule that Jet A1 should never follow a vegetable oil cargo.

If manual desludging of tanks is done, the residues must be disposed of in accordance with the relevant Marpol rules.

SS tankers carrying CPP should top up their small tanks with extreme caution preferably loading by gravity or a centrifugal pump at low rate.

Remember after Furnace oil it is difficult to load CPP. We do not allow it unless followed by an intermediate solvent like LDO ( not golden HSD ). The Heavy oil embedded in teflon valve seatrings will keep diffusing. 

STATIC ELECTRICITY :

Restrict initial loading rates for kerosene and jet fuels , when splashing and surface turbulence occur, to flow rates less than 1 meter/second (volume flow rate conversions tables are available in ISGOTT). Adequate inlet coverage's are: side or horizontal entrance- 0.6 meter; downward pointing inlet- twice the inlet diameter . When necessary to use inert gas to displace clean products, a minimum amount must be used, particularly for aviation fuels.

Clean product lines should never be blown with air.  All pipes, hoses, and fittings be conductive, electrically continuous, and bonded to ship's structure. Cargo transfer piping must be insulated from the land-side terminal since electrical potential may differ from that of the vessel due to stray current or cathodic protection of the pier. Insulating flanges, joints, or sleeves are sometimes used to divide the cargo hoses into electrically isolated halves - onboard and shore side. Each half is bonded and grounded to its respective base potential.

Do not allow ship-to-shore bonding except where required by statute. In such a case, insulating flanges are still required in cargo lines. Non-conductive hose can become conductive with use and is not an acceptable substitute for an insulating flange. Insulating flanges must be used when connected to submarine pipelines which have cathodic protection.

When doing STS electrical bonding between 2 ships is not necessary.

-------CAPT AJIT VADAKAYIL ( 28 years in command )

15 comments:

  1. Sir,

    Is there any cargo compatibility chart available for Chemical Vessels loading with Jet A-1 Fuel?

    What should be the previous 3 cargoes in that case?

    ReplyDelete
    Replies
    1. hi ax..

      there is a compatibility chart-- tell your company to send you one.

      this chart will also address PIPE LINE ADMIXTURE .- comes in handy of you use the same line for discharge

      capt ajit vadakayil
      ..

      Delete
  2. Sir,
    got the shell pre cargo matrix white petroleum products..but my question is can Jet a-1 be carry in a chemical vessel. If Yes then what are the guidelines to be followed .I've gone through EI HM 50 guidelines but there also it has not mentioned that what are guidelines to be followed. Kindly Advice.

    ReplyDelete
    Replies
    1. hi as,

      jet fuel is nothing but superior kerosene .

      make sure cargo does NOT get contaminated by gasolene ( in the pipeline ) making it more volatile-- or by dirt ( sludge at bottom of tank due to NOT cleaning out the previous consignment of same cargo ) .

      jets planes have fuel micro filters .

      inspect the tank and make sure pipeline contamination does NOT take place.

      capt ajit vadakayil
      ..

      Delete
  3. Sir,
    Where from i can get that Cargo compatibility chart for AFT against Chemicals. I tried finding it a lot but couldn't find. So kindly Advice.

    ReplyDelete
  4. Replies
    1. hi as,

      REPEATING SECOND TIME-

      ASK YOUR COMPANY FOR ANNEX 1 COMPATIBILTY LIST- WITH PIPELINE ADMIXTURE.

      capt ajit vadakayil
      ..

      I CLOSE THIS SUBJECT HERE-

      Delete
  5. Dear Sir,

    Can the JET A-1 be loaded with gas oil in a multi product vessel?I've gone through EI JIG 1530 where @ 8.3.5 it's mentioned that Jet a-1 wherever possible should be carried in a dedicated vessel where as @ 10 it's mentioned that segregated fuel system should be provided.
    Kindly advice in this regard

    ReplyDelete
    Replies
    1. hi as,

      i really do not understand why you are making a great deal out of this.

      the whole world is carrying jet fuel. make sure there is NO contamination -- on chemical tankers tanks are segregated by removable spool.

      I CLOSE THIS SUBJECT HERE-- NO MORE .

      capt ajit vadakyil
      ..

      Delete
  6. After I left a shipping company, all my shore bosses got drunk in a party –
    BACHCH GAYA SAALA PARTY.

    All of them took turns to run down Capt Ajit Vadakayil .

    Later on when my biggest detractor got totally drunk, he says ( told to me by one fan junior level boss )-

    ONE THING WE GOT TO ADMIT, THOUGH — IF VEERAPPAN AND GANG SUDDDENLY ATTACKED US , WE ALL WOULD BE HIDING UNDER OUR DESKS – ONLY VADAKAYIL WOULD FIGHT BACK , AND FUCK VEERAPPAN.

    Indeed –what the sober man has in his heart , the drunken man has on his lips !

    TEE HEEEEEEE !

    Capt ajit vadakayil
    ..

    ReplyDelete
  7. After I left a shipping company, all my shore bosses got drunk in a party –
    BACHCH GAYA SAALA PARTY.

    All of them took turns to run down Capt Ajit Vadakayil .

    Later on when my biggest detractor got totally drunk, he says ( told to me by one fan junior level boss )-

    ONE THING WE GOT TO ADMIT, THOUGH — IF VEERAPPAN AND GANG SUDDDENLY ATTACKED US , WE ALL WOULD BE HIDING UNDER OUR DESKS – ONLY VADAKAYIL WOULD FIGHT BACK , AND FUCK VEERAPPAN.

    Indeed –what the sober man has in his heart , the drunken man has on his lips !

    TEE HEEEEEEE !

    Capt ajit vadakayil
    ..

    ReplyDelete
  8. STOP PRESS:

    SOMETIMES MY READERS WONDER HOW I GET SO MUCH OF UNKNOWN INFORMATION..

    A CHUNK OF IT CAME BY "SHAKING DOWN " PEOPLE.

    MAKE SOMEONE FEEL THAT IF HE DOES NOT CONFESS- HE WILL GO TO JAIL-- AND I HAVE THE POWER TO DO IT.

    THIS IS WHO I CAME TO KNOW SECRETS OF "INDIAN SHIP MANAGEMENT COMPANIES "

    EXAMPLE?

    ONCE I WAS PUT IN A HOTEL ROOM WITH SAME SEROUS DEFICIENCIES --SAY THE ROOM DID NOT HAVE A WINDOW

    I WOULD CALL FOR THE TOP MANAGER AND SHAKE HIM DOWN.

    BUT HEY--

    BUT I MAY RE-CONSIDER , IF HE TELLS ME HOW MUCH KICK BACK PERCENTAGE HE GIVES TO THE MANNING OFFICE WHO PUTS SHIP OFFICERS IN HIS HOTEL.

    PAT- THE ANSWER WILL COME-- 40 %

    THIS MEANS IN A HOTEL ROOM COSTING 5000 BUCKS A DAY 2000 BUCKS GOES TO THE POCKET OF OWNER/ MANAGER OF THE MANNING OFFICE.

    I HAVE SHAKEN DOWN SHIPPING ACCOUNTANTS IN FOREIGN NATIONS . NOBODY LIKES JAIL

    I HAVE COME TO KNOW OF SLIMY SHIP MAMANGEMENT INDIAN COMPANIES WHO PAY AN OFFICER 6000 DOLLARS A MONTH-- BUT THEY FORGE THE WHOLE SIGNED SHEET AGAIN ( ENTIRE CREW ) IN THE OFFICE , AND CHARGE THE JAPANESE SHIP OWNER 30% EXTRA.

    THAT MEANS IF THE ACTUAL WAGES GIVEN ARE 2 LAKHS DOLLARS PER MONTH 60,000 DOLLARS ARE SKIMMED OFF BY THE INDIAN SHIPMANAGEMENT COMPANY--WITHOUT THE CREW OR THE JAP SHIPOWNER KNOWING.

    OFFICERS AND CREW ARE MADE TO PAY FOR THE "FLAG DOCUMENTATION" SAY--PANAMA/ MONROVIA ETC SAY 800 DOLLARS-- BUT THEY COLLECT THIS MONEY FROM THE JAP OWNERS TOO--

    FLAG DOCUMENTATION-- CERTIFICATE OF COMPETENCY, CDC, SPECIAL VERTIFICATES LIKE OIL / CHEMICAL/ GAS ADVANCED COURSEs ETC

    I HAVE THE POWER TO JAIL SEVERAL HIGH FLYING MAHA MERUS WITH PROOF. I HAVE REVEALED JUST 2%.

    SOME OF THEM ARE IMMORAL SONS OF BITCHES-- THEY WILL SELL THEIR OWN MOTHERS TO WHORE HOUSES.

    WELL THEY WILL READ THIS TODAY--AND ALL WILL SHIT IN THEIR LANGOTS AND SPEND SEVERAL SLEEPLESS NIGHTS

    capt ajit vadakayil
    ..


    Capt. Ajit VadakayilFebruary 26, 2016 at 2:31 PM
    SOMEBODY CALLED –

    ASKED ME CAN YOU REVEAL SOME MORE ABOUT THESE BASTARDS RUNNING INDIAN SHIP MANAGEMENT COMPANIES—

    OK— TWO MORE

    AAA- MONTHLY ALLOTMENTS TO HOME BANK REACHING LATE.
    ##################################

    LET US SAY THAT I SENT 15000 USD AS MONTHLY ALLOTMENT TO MY WIFE

    IT WILL REACH MY HOME ONLY AFTER 20 DAYS

    THE FIRST 20 DAYS , THEY MILK OFF THE INTEREST ( HUGE AMOUNT FOR THE WHOLE CREW ) IN SOME BANK.

    AS A BONUS TO THESE BASTARDS I WILL NOT REVEAL THEIR FCNR / NRE MONEY CHANNELING VIA THE MAURITIUS ROUTE OR WHATEVER -- FERA - AS OF NOW


    BBB- A LOT OF COMPANIES DEMAND THE FIRST MONTHs SALARY AS BRIBE.
    ######################################

    I STOPPED THIS WHEN I CAME TO KNOW ABOUT THIS.

    EXAMPLE: I HAD A BANGLADESI OFFICER WHO HAD TO PAY HIS RECRUITING MANNING AGENT ( A SHORE CAPTAIN ) AT DHAKA , HIS FIRST MONTHs SALARY- BEFORE BOARDING THE SHIP.

    THIS MEANS YOU WORK THE FIRST MONTH WITHOUT SALARY.

    I CALLED UP THE TOP HONCHO IN DENMARK ( MY DIEHARD FAN ) AND STOPPED THIS NONSENSE , THAT VERY MINUTE.

    Capt ajit vadakayil
    ..

    ReplyDelete
  9. pravendra
    July 11, 2016 at 4:05 AM

    http://www.thinkstors.com/#!Captain-Radhika-Menon-1st-Woman-Captain-Of-Indian-Merchant-Navy-To-Receive-IMO-Award-For-Exceptional-Bravery-At-Sea/cjds/5782ad980cf2f626feb1610e

    ReplyDelete
    Replies
    #####################
    Capt. Ajit Vadakayil
    July 11, 2016 at 9:09 AM

    hi p,

    THERE IS NO BRAVERY INVOLVED BY THE CAPTAIN. ZERO BRAVERY IS INVOLVED.

    IF SHE DOES NOT GO FOR THE RESCUE SHE LOSES HER LICENSE . .

    IT IS JUST A FEMINIST THRUST.

    I HAVE DONE RESCUES AT SEA IN UNIMAGINABLE CIRCUMSTANCES -- NEVER TALKED ABOUT IT-- EVEN WHEN COMPANY WANTED TO PRAISE ME- I SAID--NO--I AM JUST IN CHARGE -- MY CREW DID IT.

    I REFUSE TO TAKE BRAVERY AWARDS TO SAVE LIFE.

    http://ajitvadakayil.blogspot.in/2011/02/naive-sailor-weather-routing-capt-ajit.html

    QUOTE: once north of the aleutian , my ship had to go the rescue of a brand
    new XXX ship-- whose foremast fell down due to getting top heavy by
    rime -- the fallen mast was held by 4 stout wire stays and was battering
    the ship like BRUCE LEE'S nanchaku. our own forecastle was like a mount
    everest with rime .UNQUOTE

    YOU HAVE NO IDEA WHAT THE ABOVE MEANS -- MOUNTAINOUS ROUGH SEAS-- CHILL FACTOR MORE THAN MINUS 40 DEG C

    WHO KNOWS EVERY SOON HIJRAS WILL FLY FIGHTER JETS.

    IN PEACE TIME-- YES--THEY WILL ALSO FLY WELL -- WHEN SHIT HITS THE FAN--IT TAKES A MAN WITH BALLS !

    capt ajit vadakayil
    ..

    ReplyDelete