For an Emergency DG set of 1600 KW , the spec requires Full load run test to be done for 8 hours. But the vendors are offering to have only for 1 hr to 2 hour only. Whether full load test runs duration are based on the capacity of the Generator or for all the Generators?
Similarly whether it is...
One of the Engine manufacturer has indicated Same value as the Rated power of the offered Engine for both the standard conditions as well as for the Site ambient conditions ( in this case it is 54 Deg C) . Is this is technically possible?
The DG set is 1600 KW and the manufacturer has...
For an emergency Diesel Generator set, among the different power rating definitions , Continuous Power (COP) and the Prime Power Rating(PRP)which one is to be selected for which application. For the PRP it is indicated that the average power output is 70% of prime power over 24 hours operation...
An alternator specification calls for Class F insulation with Temp rise to Class B. The ambient Temp max is indicated as 54 Deg C.
Is it not enough if we specify the Insulation Class alone.What is the significance of specifying this detail "Temperature Rise"?
Thanks to clarify.
For one of the Emergency DG set ( 1600 KW), the specification indicates Class F insulation and Overtemperature rise class B.
One of the vendor has offered for Class H insulation and Overtemperature rise class B.
Class H insulation will give better life than Class F . Is it OK to stick on to...
I have read the abstract of one of the paper presented in CHEMECA 2007 , on "The Guidlines for a motor driven centrifugal compressor package"
It seems that the details indicated in the abstract will be very useful to the engineers who have just come to the design field .
Can anybody spare a...
For a vertical submersible pump ( closed drain drum pumps of Vs4 type) , the vendor has given the allowable operating region upto the end of its curve . Is it advisable to run a centrifugal pump continuously at its end of curve? Will there not be any impact on its effective life of the...
In the licensor document , for the ID fan of the Fired heater , it has been mentioned that the blades shall be of Radial or Modified Radial self cleaning type. My query is whether Modified Radial Self cleaning type is equal to the Radial Tipped Blade. ( Radial tipped blade is more efficient than...
For one of the centrifugal pump and Hydraulic Power recovery turbine pump , the vendor is using Tilting pad bearings for thrust as well as Radial bearing. The rated kw of the Pump is 1200 kw . Vendor is offering to have ring oil lubrication ( No force feed with ext lube oil pump). As per Energy...
For the Refinery plant , two Lean Amine pumps are proposed - One pump of configuration HPRT-PUMP-Motor and the other installed standby with Pump-Motor . Rated power of the motor is 1203 KW and the Installed motor power is 1400 KW. The Pump speed is 2965 RPM. The motor manufacturer requires...
In one of the Process data sheet for a closed drain drum vertical pump - Amine service ( handling water ( case 1 ) and Hydrocarbon ( case 2), it has been indicated that the vapour pressure of the Hydrocarbon is 1.23 kg/cm2 (a) and the suction pressure ( rated) is 0.2 kg/cm2 (g). If both...
For a given driven equipment ( Pump) , with the known GD2 value and torque requirement , how the frame size of the drive equipment ( motor) is selected? What are all the factors to be considered. In one of the Project , the client had changed the make of the motor from one vendor to another...
What is the acceptable length of the Steam jacketted lines for molten sulphur with one steam inlet and outlet to the jacket. The jacketting steam pressure is 3.5 bar. It is being asked to have single length of 20 metres with one steam inlet and outlet . Is there is any standard for the designing...
In one of the Process specification document , it has been speficied that for the Presence of h2S , Copper and Copper alloys shall not be used. We can understand that For Amine services we shall not use Cu and Copper alloys. Why Cu and Cu alloys should not be used for H2S service?
For one of Fertiliser Plant project, there is a Hot Gas generator for supplying Hot gas ( fuel is Natural gas / Diesel Oil)to the Rotary Drier to dry the fertiliser granules. It has been specified in the equipment data that API 560 and RP 556 is applicable for this. Where as these standards are...
For one of Fertiliser project, there is a Hot Gas generator for supplying Hot gas ( fuel is Natural gas / Diesel Oil)to the Rotary Drier to dry the fertiliser granules. It has been specified in the equipment data that API 560 and RP 556 is applicable for this. Where as these standards are mainly...
The engineering data sheet specifies VS4 type pump for the closed drain vessels in the refinery plant. For one of such pump the capacity is 15 m3 /hr and head 60 metres. Two cases have been furnished . Case one with water and case 2 with Hydrocarbon ( with H2S). One of the vendor has selected...
In the COntrolled volume pumps - (as per API 675), the set pressures for the Internal and External safety valves are differently being followed by each vendor. Some vendor set the Internal set pressure more than the External RV set pressure and some vendors in the other way. Is this purely based...
For the centrifugal pumps ,where the fluid temp is above 200deg c it is said a warming up arrangement is reqd to the standby pump from the running pump discharge. Some of the vendors say that they do not require warm up arrangement. How come for the same material of construction of the pump and...
