P 57
JMD DTA Contd.
As I said earlier, my water story during DTA days continued at different angles!
On my return from Chennai, with the help of Jamnagar engg. group I got the sacrificial anode introduced at all en route manholes in that 3 X 16 Km long sea water supply lines and return brine line and got over the mess. Afterwards we never had any problem at all and all these lines are in service without any break for the last 17 years. Touch wood!
Having touched intake sea water, let us see what all difficulties we faced in sea water storage after the filtration unit in MTF area. As nobody has carried out the engineering and execution of this large capacity- 10500M3/Hr. of sea water intake, Reliance was forced to go with experimenting for filtration package selection. Not to take any chance at all, Bechtel went ahead with conventional classifier arrangement and placed the turn key order on M/S UEM, a Delhi party. Though it was one man show, Mr Bhatia put his heart and soul in execution of the same. Though he faced lot of financial constraints, Reliance backed him to ensure successful completion.
As good engineering practice and to take double benefit, the team conceived the filter water pond of 6 hours water capacity as reserve and utilize the same as fire water pond for Marine tank farm FW use. Typical of fixing the quantum for Fire Water at the bottom , the raw water level was on the top. So we ended with the storage volume of more than 100000 M3. For fire water objective, we used 10 X 1000 M3/Hr pumps standardized KBL model. It so happened that in all Reliance JMD tank farm, the MVWS spray requirement for the largest dyke called for 6600M3/Hr, keeping NFPA spec. of @10.2 lpm /M2 surface area. To meet TAC condition of 150% pumping capacity, it so happened that we ended with 5 Motor and 5 Diesel everywhere. There came the catch ! As the order was placed for standard pump meeting sea water service conditions, we did not realize that the vertical immersion of shaft height in the pump house built within pond can come as an issue! It fell short by 1 1/2 M and we took up with KBL for necessary rectification. As we have an excellent working relationship even up to their chairman level, Mr Sanjay Kirloskar got involved personally , took up that challenge and executed as task force. Since then we do not have any issue at all in that aspect.
While dealing with fire water pumping and network- both in tank farms/ and refinery, it is absolutely important that I should share some of the inherent problems we faced.
1. Interface engineering did not envisage the valve pit size Vs interior arrangement to make provisions for split spools to drop&re-erect butterfly valves in the valve pit
2. Provision of necessary puddle flange in valve pits were goofed up during detailed engineering.
3. To take short cuts and to meet the committed time schedule , the construction group raising SER to go with service test instead of hydro test of mains has caused more damage than benefit. The network system was never flushed to get rid of construction debris.
4. As the sourced butterfly valve disk end rubber rings were not properly embedded, they gave way during commissioning and that has become a bitter truth even now.
5. In DTA days, Bechtel has also missed out the provision of flushing connection for under ground fire water network. Contd......
Key Aspects :-Attitude, Codes& Standard, Critical challenge, Faith, Incident analysis, Technical issue
JMD DTA Contd.
As I said earlier, my water story during DTA days continued at different angles!
On my return from Chennai, with the help of Jamnagar engg. group I got the sacrificial anode introduced at all en route manholes in that 3 X 16 Km long sea water supply lines and return brine line and got over the mess. Afterwards we never had any problem at all and all these lines are in service without any break for the last 17 years. Touch wood!
Having touched intake sea water, let us see what all difficulties we faced in sea water storage after the filtration unit in MTF area. As nobody has carried out the engineering and execution of this large capacity- 10500M3/Hr. of sea water intake, Reliance was forced to go with experimenting for filtration package selection. Not to take any chance at all, Bechtel went ahead with conventional classifier arrangement and placed the turn key order on M/S UEM, a Delhi party. Though it was one man show, Mr Bhatia put his heart and soul in execution of the same. Though he faced lot of financial constraints, Reliance backed him to ensure successful completion.
As good engineering practice and to take double benefit, the team conceived the filter water pond of 6 hours water capacity as reserve and utilize the same as fire water pond for Marine tank farm FW use. Typical of fixing the quantum for Fire Water at the bottom , the raw water level was on the top. So we ended with the storage volume of more than 100000 M3. For fire water objective, we used 10 X 1000 M3/Hr pumps standardized KBL model. It so happened that in all Reliance JMD tank farm, the MVWS spray requirement for the largest dyke called for 6600M3/Hr, keeping NFPA spec. of @10.2 lpm /M2 surface area. To meet TAC condition of 150% pumping capacity, it so happened that we ended with 5 Motor and 5 Diesel everywhere. There came the catch ! As the order was placed for standard pump meeting sea water service conditions, we did not realize that the vertical immersion of shaft height in the pump house built within pond can come as an issue! It fell short by 1 1/2 M and we took up with KBL for necessary rectification. As we have an excellent working relationship even up to their chairman level, Mr Sanjay Kirloskar got involved personally , took up that challenge and executed as task force. Since then we do not have any issue at all in that aspect.
While dealing with fire water pumping and network- both in tank farms/ and refinery, it is absolutely important that I should share some of the inherent problems we faced.
1. Interface engineering did not envisage the valve pit size Vs interior arrangement to make provisions for split spools to drop&re-erect butterfly valves in the valve pit
2. Provision of necessary puddle flange in valve pits were goofed up during detailed engineering.
3. To take short cuts and to meet the committed time schedule , the construction group raising SER to go with service test instead of hydro test of mains has caused more damage than benefit. The network system was never flushed to get rid of construction debris.
4. As the sourced butterfly valve disk end rubber rings were not properly embedded, they gave way during commissioning and that has become a bitter truth even now.
5. In DTA days, Bechtel has also missed out the provision of flushing connection for under ground fire water network. Contd......
Key Aspects :-Attitude, Codes& Standard, Critical challenge, Faith, Incident analysis, Technical issue
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