PURGING ROUTINEFOR FRAMO CARGO PUMPING SYSTEMSERVICE BULLETIN #47

Use Framo Purging Form and submit the result to

autopurging@framo.no

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Service Bulletin #47

Purging Routine for Framo Cargo Pumping System

Purging Routine

• Purge the cargo pump cofferdam regularly.

• Log and evaluate the purging results.

• Remember: A clean and open cofferdam gives trouble free cargo pumping.

• The ship crew have the primary responsibility for purging and necessary action to be taken, knowing the actual operation and running conditions.

• If in doubt, please contact Framo Services AS for advice.

• Send the purging form to Framo for control and filing.

General

Purging of the cofferdam is one of the most important preventive maintenance routines when operating a Framo submerged cargo pump. This is a unique way to check the pumps seals and thus the condition of the pumps, without entering the cargo tanks. Any leakage over the seals will collect in the cofferdam, and through regular purging the leakage rates can be determined and action (if necessary) can then be planned which will ensure safe and trouble-free operation of the cargo pump.

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Purging routine on board

The cargo pump cofferdam must be purged regularly in accordance with Framo Purging Instruction, doc. no. 1000-0010-4 found in the Service Manual for your ship.

The primary responsibility for purging, logging of results and any action thereafter lie with the ship’s crew, as they know the actual running conditions on board and are entrusted with correct operation and maintenance of the equipment on a daily basis.

If the purging results indicates that maintenance is required– the necessary steps must be taken without delay by the ship’s crew. If needed, Framo can of course be contacted to assist in any way.

New routine for purging forms

Every month, Framo handles thousands of incoming purging forms via the purging@framo.no service. These forms are submitted in many different formats, such as Word documents, Excel spreadsheets, handwritten and scanned PDF files, image formats and compressed files, all of which takes time to check and assess one by one.

Until now this work has been performed manually and due to available resources, the feedback on purging results has been limited to those ships where action is required, such as in cases with blocked cofferdams, large cargo leakage, hydraulic oil leakage, etc. In order to handle the increasing number of purging forms submitted and to provide our customers with an improved service, Framo has developed a new system for handling the purging forms.

As well as the new handling system, a new purging form has been developed based on a Microsoft Excel spreadsheet. Only this new purging form is to be used and submitted to Framo, other formats will be rejected as the file will not be readable by the system.

If you have not yet obtained this new purging form, please send a request to autopurging@framo.no where you will receive a mail in return with the new form.

The spreadsheet also contains the following:

• Instructions for recording results in the purging form

• Examples of a completed purging form

• Unit conversion table to metric system

• Description of various purging results which can be a helpful tool for the ship’s crew for analyzing results on board.

Purging forms are to be submitted after each voyage is finished and the discharge completed, when all cofferdams have been purged. Volumes are only to be entered in litres (use supplied conversion table if necessary).

It is also important that the purging form is as complete as possible in order for Framo to analyze the data and give a meaningful response to possible leakages. Make sure that purging results for each stage of the cargo operations are filled into the corresponding column of the purging form.

Tip: Use the “Remark” column to fill in information which can be useful for yourself and for Framo upon evaluation of the purging forms. E.g. if there is a high leakage and you know the reason and have planned to replace cargo seals at next docking, enter this information in the remark column.

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Upon submission of the purging form to Framo, you will get one of the four following automatic responses from the system:

Evaluation complete - The purging form has been evaluated by the system, found satisfactory and archived in the Framo purging database as part of our service record for the ship. No further actions or comments needed.

Manual Evaluation - The purging form has been evaluated by the system and manual evaluation by Framo service personnel is required. You will receive further assistance and additional information (e.g. troubleshooting and leakage test procedures) soon after.

Purging form rejected - The purging form has been received but could not be analyzed due to missing information in the file. The submitter of the purging form will receive an e-mail in return with description of what information was missing. Please check, amend and re-submit the purging form accordingly.

Wrong file/enclosure - The purging form received by the system has been rejected

due to incorrect file format or the file was missing. The correct purging form template together with instructions and an example is attached for your information.

Multiple purging forms can be submitted as multiple attachments in one e-mail. The system will handle each purging form separately and individual e-mails will be sent in return for each submitted purging form.

Please do note that in such cases you may receive an email first for e.g. voyage 22 where action is required and for e.g. voyage 24 all is OK and no action is needed because crew have already taken action. In such cases, Framo will evaluate the purging forms in successive order.

Service Bulletin #47

Purging Routine for Framo Cargo Pumping System

Note: For ballast pumps with liquid filled cofferdams, there is a separate sheet containing the “log form for liquid filled cofferdam”. Fill in ship data (ship name, IMO no. and voyage no.) on sheet no. 1 before submitting.

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Service Bulletin #47

Purging Routine for Framo Cargo Pumping System

Summarized the new routine for purging forms has several benefits:

• Standardized purging form for your whole fleet

• In general, faster response time from Framo and a reply and confirmation for every submission

• Automated filing for all submitted purging forms

• New purging form gives instant feedback if all required fields have been filled in before submittal

Submit purging forms to:

autopurging@framo.no

In case the ship’s crew need information/advice from Framo, they can contact us by e-mail: service@framo.no, and the ship will receive a quick answer from Framo Services AS.

Alternatively in more urgent matters call +47 55 99 92 00

or after office hours +47 90 99 00 06

or contact your nearest Framo service station, contact details on the back of this service bulletin and www.framo.com

So finally – good luck with your Framo Cargo Pumping System.

Do the purging regularly and send the purging form to Framo for control and filing.

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Remember

• Safety first: Exhaust gas and liquid may be hazardous. Wear safety gear and avoid contact with drain from exhaust trap and venting line

• Purge the cargo pump cofferdam regularly

• Purging medium can be air or inert gas

• Makes sure the cargo pump’s cofferdam is open and that purging medium is coming out of the exhaust trap

• If air is used as purging medium, drain airline regularly for possible water condensation

• Makes sure the drain hole from the pump’s cofferdam never is blocked

• Clean and open cofferdam gives trouble free cargo pumping

FRAMO ASP.O. Box 23, NO-5329 Florvåg, Norway Phone: + 47 55 99 90 00Telefax: + 47 55 99 93 80

E-mail: marine@framo.no

FRAMO NederlandEdisonweg 18 P.O. Box 305NL-3200 AH SpijkenisseThe NetherlandsPhone: + 31 181 619311nederland@framo.no

FRAMO USA3002 East 13th StreetLa Porte, Texas 77571, USA Phone: + 1 281 884 4800 houston@framo.no

FRAMO Singapore17 Tuas View CircuitSingapore 637575Republic of SingaporePhone: + 65 6210 2400singapore@framo.no

FRAMO JapanKotsu Building 5F, 15-5Shinbashi, 5-chomeMinato-kuTokyo 105-0004, Japan Phone: + 81 3 5776 2405tokyo@framo.no

FRAMO KoreaRm 608, Centum Sh Valley35, Centum Dong – RoHaeundae – Gu, BusanKorea, 612-020Phone: + 82 51 743 6942/3busan@framo.no

FRAMO ShanghaiBuilding No.5, 123Lane 1165, Jin Du RoadMin Hang District, ShanghaiChina 201108Phone: + 86 21 6115 5000 shanghai@framo.no

FRAMO BrasilAv. Presidente Vargas, 463 /19° andar, Rio de Janeiro CEP 20071-003, BrazilPhone: + 55 21 2507 7898 framobr@framobr.com.br

FRAMO Middle EastAl Quoz Industrial AreaP.O. Box 21467Dubai, United Arab Emirates Phone: +971 4 886 1313, dubai@framo.no

FRAMO Fusa ASVenjanesetNO-5641 Fusa, NorwayPhone: + 47 55 99 96 00marine@framo.no

FRAMO Holsnøy ASRosslandsvegen 933NO-5918 Frekhaug, Norway Phone: + 47 55 99 75 00piping.marine@framo.no

FRAMO Flatøy ASFlatøyvegen 24 NO-5918 Frekhaug, NorwayPhone: + 47 55 99 94 00oil&gas@framo.no

FRAMO Services ASP.O. Box 44NO-5329 Florvåg, NorwayPhone: + 47 55 99 92 00service@framo.no

framo.com

Framo Submerged Cargo Pumps

No. 1000-0010-4Rev. L 15Dec17

Purging Instruction

CONTENTS 1 How to purge the cofferdam 2 Purging intervals – logging of purging result 3 Evaluation of the purging result 4 Trouble shooting 5 Precautions to be taken when handling special types of cargoes 6 Example of purging form

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 2 of 8 15Dec17/AGAa

Cofferdam purging connection

Purging medium supply

Exhaust gas

Cofferdamcheck pipe

Container tocollect the leakage

Exhaust trap

CLOSED

CLOSED

Purgingmedium

Flexible hose withsnap-on coupling

Vent. line

Drain valve

CLOSED

CLOSED

Reliefvalve

Fig. 1

This procedure describes purging of submerged cargo pumps with «dry» cofferdam. (For submerged cargo pumps with liquid filled cofferdam, refer to instruction 1000-0102-4.) The cargo pump cofferdam is essential for segregation of the pump hydraulic section from the cargo – and for seal monitoring. Purging to be carried out at regular intervals for the purpose of:

- Leakage rate detection - Condition monitoring of the shaft seal system - Avoid that leakages are blocking the cofferdam

1 HOW TO PURGE THE COFFERDAM

CAUTION: Exhaust gas and liquid may be hazardous. Wear safety gear and avoid contact with drain from exhaust trap and venting line. Preparation: 1) Place a suitable container underneath the exhaust trap to

collect the leakage.

2) Check that drain valve at bottom of exhaust trap is not blocked.

3) Drain the purging medium supply line for condensed water.

4) Connect purging hose (max. supply pressure 7 bar).

Purging: 5) Start the purging by opening the valve at purging medium

supply line.

Note! A relief valve is fitted at cofferdam purging connection. This is set at 3-3,5 bar to limit the purging pressure for protection of the pump seals. A small leakage from the relief valve is normal when liquid is purged from cofferdam. The valve will also open if the cofferdam is blocked.

6) Check that exhaust gas is coming out of the exhaust trap vent line (to verify that cofferdam is open).

CAUTION! Exhaust gas and liquid – watch out ! 7) Purge cofferdam in several sequences if required.

Drain exhaust trap between each sequence.

8) Disconnect purging hose.

9) Close exhaust trap drain valve.

10) Log the amount of leakage - evaluate the result.

Note! For handling special cargoes, ref. chapter 5.

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 3 of 8 15Dec17/AGAa

2 PURGING INTERVALS - LOGGING OF PURGING RESULT

LOADING VOYAGE DISCHARGE

1. Shortly before loading.

1. 1-2 days after loading. 1. Shortly before discharging.

2. If no leakage at step 1, purge every fortnight.

2. Shortly after discharging.

3. If leakage is detected at step 1, or at a later stage during the voyage, purge this pump every day.

4. If pumps are used for cargo circulation during the voyage, the cofferdam must be purged before start and after stop.

Note! Neglecting of purging can result in a blocked cofferdam and lack of leakage control. The purging form should be filled in with the results from every purging operation. Each horizontal line in the form represents one cargo in one tank from loading until discharging. If a ship loads and discharges some tanks more frequently than other, an extra form should be filled in for those tanks.

Example of FRAMO purging form Filled in purging form to be sent to Ship owner and to Framo (autopurging@framo.no). If you need the latest purging form template, send a blank e-mail to autopurging@framo.no and it will be sent to you shortly after. Ship’s crew to evaluate the purging results and to take necessary action – however in case the ship’s crew needs advice, contact a Framo Service Station.

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 4 of 8 15Dec17/AGAa

3 EVALUATION OF THE PURGING RESULT

3.1 Cargo leakage A small leakage rate of up to about 0.5 l/day (and higher with light cargoes) during pump operation is normal. Acceptable leakage rate depends on the type of cargo and possible consequences in case of leakage. - Risk for clogging of pump cofferdam

Cargoes like naphtha, condensate etc. penetrates the shaft seals more easily than lubricating oils, vegetable oils and other viscous cargoes. It is therefore recommended to carefully monitor the leakage rate over a period of time, preferable with different type of cargoes. For critical cargoes, when the leakage rate is about 2 litres/day or higher, the pump must be purged a couple of times daily and service (leak test and repair) carried out at first opportunity. Intensify the purging if the leakage rate is exceeding acceptable limits. If this is not sufficient to keep the leakage under control it must, depending on the nature of the cargo, be considered to discharge the tank using the portable pump. Cargo leakage to cofferdam normally indicates shaft seal leakage. But the leakage might come from flange connections or damage (cracks/pin holes) in pump/pipe stack (ref. chapter 4, Trouble shooting). The development of a cargo leakage can be monitored if purging is done according to instructions. Thereby maintenance work can be planned, and unexpected shut down due to leakage can be avoided.

3.2 Hydraulic oil leakage Hydraulic oil in the cofferdam normally indicates shaft seal leakage, but might come from flange face seals in pipe stack/ pump head or damage in the pipe stack/pump head. A small leakage rate into the cofferdam up to about 10 ml/h (0.25 l/day) from the mechanical oil seal or lip seal during pump operation is normal. For short periods of time, higher leakage peaks can occur. If the leakage rate is increasing above acceptable level, the pump must be purged a couple of times daily, and inspected at first opportunity to find the reason for the leakage. Intensify the purging if the leakage rate is increasing above the acceptable level. If this is not keeping the leakage under control, close the hydraulic service valve. Depending of the nature of the cargo consider to use the portable pump to discharge the cargo. 3.3 Blocked cofferdam In general we do not recommend to operate the cargo pump with blocked cofferdam. For advice, depending of type of cargo etc., contact a Framo Service Station.

Note! Always remember to leak test the cofferdam with 3 bar to locate the leakage prior to any

dismantling of the cargo pump.

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 5 of 8 15Dec17/AGAa

4 TROUBLE SHOOTING

Warning: To prevent damage from hazardous cargoes, take necessary precautions, wear safety gear and avoid contact with spray/gases.

Symptom: POSSIBLE REASON: Remedy: *)

Not possible to purge the cofferdam (no air, inert gas or liquid coming out of the check pipe when purging)

(See also chapter 1)

a) No or insufficient purging medium supply

b) Blocked cofferdam system

Note! In case steam is used in attempt to clear a blockage in pump cofferdam system pay special attention not to over pressurize the pump/pipe stack

a) Check valves, hose connections and purging medium relief valve (open at approx. 3 bar).

b) Check the exhaust trap and the piping on deck for blockage. Open if possible.

b1) Disconnect check pipe from pump unit

(lower seal house) – watch out for possible pressurized liquid in cofferdam!! By carefully purging check if the blockage is located in the check pipe or in the pump/ pipe stack cofferdam. Depending on the nature of the medium blocking the cofferdam system use steam or solvent to dissolve the blockage. Dismantling of pump might be required.

Note! Leak test pump after assembly.

Cargo leakage to pump cofferdam.

(See also chapter 1)

General Note! Always leak test pump prior to and after dismantling. This is required to locate possible leakage and to confirm no leakage upon completion of repair. a) Worn cargo seal

Note; If no leakage is detected by leak test it is likely that the cargo leakage to cofferdam is caused by worn cargo seal. (The upper seal lip is sealing when pressurizing cofferdam.)

b) Leaking seal element in

flange connection c) Crack/pinhole in piping

Leak test pump cofferdam system at approx. 3 bar. Check for leakage – if required spray with soapy water to locate the leakage. a) Replace cargo seal set.

Also, carefully check ceramic sleeve for possible damage-wear.

b) Check for loose bolts and for pitting corrosion

in seal faces – in case of corrosion repair is required. When assemble, renew damaged seal element.

c) Contact a Framo Service Station.

*) Ref. instruction for maintenance and repair for actual pump.

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 6 of 8 15Dec17/AGAa

Symptom: Possible reason: Remedy: *)

Hydraulic oil leakage to pump cofferdam.

(See also chapter 1)

General

a) Leaking shaft seal

b) Leaking seal element in flange connection.

c)Crack/pinhole in piping

Drain the pump return side prior to dismantling. Disconnect pump head/unit from pipe stack/casing. Pressurize pump unit return side at approx 4 bar and check for leakage to cofferdam side. Leak test pump pipe stack / casing at max 7 bar on cofferdam side and check for leakage to return side. a)Replace shaft seal (replaced seal to be

reconditioned if feasible)

b) Check sealing surface for possible damage – repair if damaged. When assemble, renew damaged seal element.

c) Contact a Framo Service Station.

*) Ref. instruction for maintenance and repair for actual pump. Note! Evaluate if changed parts as sleeves, mechanical seals etc. are possible to recondition. Send these parts to a Framo Service Station and ask for an evaluation.

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 7 of 8 15Dec17/AGAa

Liquidsupply

Liquidreturn

CLOSED

CLOSEDCLOSED

Valve forregulation of flow

OPEN

Flexible hose withsnap-on coupling Fig. 3

5 PRECAUTIONS TO BE TAKEN WHEN HANDLING SPECIAL TYPES OF CARGOES

The main rule is to have the cofferdam clean, dry and vented to atmosphere through the exhaust trap vent line, in order to detect leakages easily. However, when handling certain groups of cargoes it may be an advantage to fill the cofferdam with liquid to improve the seal lifetime and to avoid solidifying cargo blocking the cofferdam. Recommended type of liquid to be filled into the cofferdam for some groups of cargoes is given below. This is a general advice, only experience can define which liquid gives the best result for the great number of different types of cargoes. In addition to this advice charters instruction, Material Safety Data sheet and any ATC instructions shall be taken into consideration during cargo operation and handling.

Filling To fill liquid in the cofferdam, disconnect the exhaust trap piping from the pump top plate. Using a suitable adapter, fill the liquid through the cofferdam check pipe. Open the purging connection to ventilate the cofferdam during filling. (Connect an open female coupling or similar). Flushing Flushing of liquid through the cofferdam can be arranged in the following way: - Connect liquid supply to the purging connection. The supply line must be equipped with a valve to regulate the liquid flow. - Open drain valve on the exhaust trap, and collect the return liquid (fig. 3).

Note! When filling liquid in the cofferdam or flushing, it is important that the hydraulic oil return pressure always is higher than the pressure in the cofferdam.

Solidifying cargoes (in cargo tanks with heating coils) To prevent the cargo to get solid (freeze) inside the suction well, circulate the cargo at intervals by starting the cargo pump.

Acid and basic cargoes After discharging and purging is finished, it may be an advantage to flush fresh water through the cofferdam to remove all residues after a leakage.

Solidifying cargoes (molasses, etc.) Fill cofferdam with fresh water. Flushing the cofferdam with a low flow of water should also be considered.

Note! Remember that some of these types of cargoes are very hazardous

Heated oil products (fuel oil, crude oil) Fill cofferdam with diesel oil or a light lubricated oil (VG10) to keep any leakage into cofferdam in liquid form. (This is especially important after stripping and during tank cleaning.)

Polymerising cargoes. (TDI, MDI) Fill cofferdam with dioctyl phthalate (DIDP/DINP) to limit the risk of blocking the cofferdam.

CLOSED

Vent. line

CLOSED

CLOSED

Open purgingconnection

Fig. 2

Framo Submerged Cargo Pumps PURGING INSTRUCTION

No. Date/Sign.: Page: Rev. L:

1000-0010-4 14Jan77/ 8 of 8 15Dec17/AGAa

6 EXAMPLE OF PURGING FORM