Dear All,
I'm presently doing Project Management Consultancy (PMC) activities for polyester continuous polycondensation unit with yarn and fiber spinning units namely POY, DTY, FDY and PSF. Can anybody help me to find forum where I can get support from experts to clarify questions related PET...
Dear all
For one of the project, we have been asked to select Duplex stainless steel material for the Plate heat exchanger Plates as the Chloride content in the cooling water is more than 300 ppm. Vendor had offered for 254SMO and when enquired they informs that Plates are not available in...
A blow-off valve (4" ANSI , Cl 1500 Stainless steel SS316 Globe valve) is installed at the discharge line of a CO2 compressor ( Integrally geared) before its NRV and the compressor discharge pressure is 160 barg. This blow off valve is provided with a fail open actuator. . During HAZOP study a...
For the Chemical dosing packages where mostly controlled volume (diaphragm type) pumps are used, for the capacity control, the stroke of the pump is varied either by manual or automatic ( motorised actuator) . Client prefers to have VFD for the capacity control as they have experienced problems...
We are finalizing the Diesel Generator specification and as per Client specification we have asked to consider redundant AVR for the DG set. Any significance on this requirement? Cummins do not have this feature.
Thanks to clarify.
In one of the Shell and Tube Heat Exchanger in the Polypropylene plant , the low temperature service calls for the LTCS material for the tubes . But the chloride content in the circulating cooling water is as high as 600 ppm. The temperature of cooling water outlet from the exchanger will be...
Dear all,
We are now doing FEED refinery project in West Coastal Region of India in which a substation is envisaged around 2000m². The max ambient temp is 45°C. Substation building accommodates switch gears, panels, MCC, MLDB, etc. I understood from some of the owner specification in previous...
We are in the process of fabricating steam lines for a heat exchanger. We have ball valves of 6" and 4" size for 50 barg pressure that are to be welded in this steam line. The steam is used only for this heat exchanger and then gets connected to the Low pressure steam header after exchanging the...
We are using VS1 type pump (fitted with single Mechanical seal catridge type )for pumping the Treated effluent to the sea. The kw rating is 430. The client specification calls for Spacer type coupling for all the pumps and somehow this got missed out during the procurement and the pump...
For the Electrical Substations and the Field Auxillary buildings located in the safe area, the Client specifications calls for Gas tight dampener ( fire dampner) with Motorized type. Where as the EPC contractor prefer to give Pneumatic type and says the action will be quick.
Need to know...
In one of the project, for the 96% sulphuric acid service and caustic service, the client specification is asking to comply with the Fugitive emissions class A for the valves. As for as i understand, is the above chemicals that are in liquid state are to be considered under Fugitive emissions...
Need to understand better the implication of the Electrostatic discharges and sparks on the painting in the installations of Gas group IIC.
Should the non-mettalic items to be restricted in such atmopsheric installations
Thanks to clarify
Hi
This is with regard to the shutdown signals of a four stage Reciprocating COmpressor for process Air service (disc pressure of 32 barg). The compressor is of API618 compliance...As per table 5 of API 618, there are four signals that calls for shutdown of the equipment.
All the four...
As per the client specification, Ball valve shall be used for on-off service. Actually one of the Valve in High pressure steam service has been used as Emergency Shutoff service ( 4" class 600).
Contractor is proposing to use Globe valve for this service..
Is the quick action of a quarter...
We are in the discussion of purchasing Knife Edge gate valves of sizes upto six inches dia to be used for On-Off purpose mounted with pneumatic actuator to be used in Sludge services. Valve manufacturers are offering Full lugged design valve only for this smaller size valve and indicating that...
Dear all,
We are executing a LNG Plant in North Arctic Region where HTF heaters are used for central/space heating in all spaces. Now, we received comment from client indicating if the capacity is less than 30kW then electric heaters shall be used. Can someone advise how this decision could...
Client specification calls for usage of Ball valve only for Actuated valves for ON-OFF service also for all sizes. Should there be any specific reason for this specification? Contractor proposes to use Butterfly valves.
Thanks to clarify
The contractor is proposing Carbon steel + Ebonite rubber lining on the shaft and blades for agitators to be used for Ferric Chloride. Can anyone share their experience on this Material of construction proposed? .
Thanks in advance for your help
For the FRP tanks of sizes around 2 metres, could there be a design such tanks when it is mounted with an agitator (rotating at around 100 rpm). It is suggested to have the agitator support through steel structural arrangement outside the tank to take care of the dynamic loads of the agitator...
We have been proposed with VS4 type pump for sump pump ( effluents + oil application in Hazardous zone application - ZOne 2) with 3 and 4 shaft construction with intermediate bush bearings + fresh water lubrication( for a pump length of 3500 mm long) . Earlier when it was discussed with the EPCC...
