Answer EKG Question 38
Q38.
You have recently joined a vessel as Second Engineer Officer. For the
past several voyages it has been the practice on board to dispense with
the use of the exhaust gas boiler and leave it to run dry. As part of an
overall economy drive company has requested you to re-commission the
boiler. Write a letter to the Superintendent Engineer stating how the
boiler was brought online and the safety valves adjusted.
Answer:
As per company's instruction the EGE to be re-commissioned again. As you are new you may not be knowing the past fact and history, the reason why it was taken out of service on whose instruction. for that you have to go through the old records and log sheets. If it was taken out of service due to some problem whether it had been attended and rectified. Other wise you have to follow the under mentioned criteria. Before taking any action to recommision it, the followings to be kept in mind. Check the manuals and any special instruction. From manuals ensure the type, construction and special features if any. Check and arrange for the tools and implements required. Through c/e obtain a work permission. Be sure about the idle time available. if vessel is in port get a immobilisation request from the authority as main engine can not be operational select your team members. If every thing is in order then proceed.
Causes for ceasing work might be attributed to
1) Defective circulating pump.( not building up pressure, excessive leakage or ceased). check and rectify.
2) Check the pipe lines for any leakages, leaky joints or blockage. rectify or replace if necessary.
3) Check all line valves for proper operation, over haul
4) Open the casing cover, visual checking of the coils, clean and wash.
5) Check soot blowers for proper operation.
6) If control flap is provided for controlling the exhaust to the coils or bypassing it to atmosphere. check the flap condition, easy movement and total sealing on either openings. repair, ease up.
7) Check the number of generating coils, whether they are individually connected with valves with inlet and outlet manifold. If individual then test the coils for leakage by opening the inlet valve of the coils and keeping shut all other valves, start the circulating pump manually keeping an eye on the discharge pressure just check at 5 kg pressure (be careful, nobody should be near vicinity and keeping the drain open) or by connecting a manual pump. Check all the coils, if any one is leaking can be isolated by keeping the valve shut and blanking both the valves.(if it is a smoke tube type. The leaky tube to be plugged with metal plugs and to be welded, if found in order try it out with circulating pump just gaging the safety valves. If found in order fit back the covers. After some time just ease up the safety valves and check if any entrapped water or steam is there. if not. take out both the safety valves (fitted on a common chest), mark as per their position (F-A or P-S). Dismantle and check the valve lid, seat, spindle, spring carrier, spring adjusting screw, cotters, releasing lever. Overhaul and boxed back, but can not be adjusted till the main engine operates. When the vessel sails out, after receiving full away, start setting the safety valves (must be done by chief engineer with minimum 3 years sailing experience) set with a calibrated pressure gauge.
After everything over sent a report to office and to the class stating vessel name, IMO No., position of the vessel ( lat. long. with GMT time and date ), set pressue, chief engineer's COC no and grade.
As per company's instruction the EGE to be re-commissioned again. As you are new you may not be knowing the past fact and history, the reason why it was taken out of service on whose instruction. for that you have to go through the old records and log sheets. If it was taken out of service due to some problem whether it had been attended and rectified. Other wise you have to follow the under mentioned criteria. Before taking any action to recommision it, the followings to be kept in mind. Check the manuals and any special instruction. From manuals ensure the type, construction and special features if any. Check and arrange for the tools and implements required. Through c/e obtain a work permission. Be sure about the idle time available. if vessel is in port get a immobilisation request from the authority as main engine can not be operational select your team members. If every thing is in order then proceed.
Causes for ceasing work might be attributed to
1) Defective circulating pump.( not building up pressure, excessive leakage or ceased). check and rectify.
2) Check the pipe lines for any leakages, leaky joints or blockage. rectify or replace if necessary.
3) Check all line valves for proper operation, over haul
4) Open the casing cover, visual checking of the coils, clean and wash.
5) Check soot blowers for proper operation.
6) If control flap is provided for controlling the exhaust to the coils or bypassing it to atmosphere. check the flap condition, easy movement and total sealing on either openings. repair, ease up.
7) Check the number of generating coils, whether they are individually connected with valves with inlet and outlet manifold. If individual then test the coils for leakage by opening the inlet valve of the coils and keeping shut all other valves, start the circulating pump manually keeping an eye on the discharge pressure just check at 5 kg pressure (be careful, nobody should be near vicinity and keeping the drain open) or by connecting a manual pump. Check all the coils, if any one is leaking can be isolated by keeping the valve shut and blanking both the valves.(if it is a smoke tube type. The leaky tube to be plugged with metal plugs and to be welded, if found in order try it out with circulating pump just gaging the safety valves. If found in order fit back the covers. After some time just ease up the safety valves and check if any entrapped water or steam is there. if not. take out both the safety valves (fitted on a common chest), mark as per their position (F-A or P-S). Dismantle and check the valve lid, seat, spindle, spring carrier, spring adjusting screw, cotters, releasing lever. Overhaul and boxed back, but can not be adjusted till the main engine operates. When the vessel sails out, after receiving full away, start setting the safety valves (must be done by chief engineer with minimum 3 years sailing experience) set with a calibrated pressure gauge.
After everything over sent a report to office and to the class stating vessel name, IMO No., position of the vessel ( lat. long. with GMT time and date ), set pressue, chief engineer's COC no and grade.
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