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Hello, Does anyone have a good spreadsheet tool for managing interfaces on plant build projects? I'm looking after project engineering for ~10 greenfield projects at varying stages from concept, through FEED to construction and need a nice clean way of keeping track of all interfaces between...

Good Afternoon Good Sirs and Madams of the PSV world. I have two questions relating to relief design to ask the forum. 1) For vessels operating on high fouling service (for example, coke in say a coker or a cracker) can anyone recommend some design techniques to prevent fouling on the PSV...

Hi All, I am completing a study on the potential for connecting an existing CHP plant, which supplies power locally to my site, to the national grid to sell surplus power to the grid. I simply need to know what new infrastructure I would need to install to make this connection. - Do I need to...

Hi, Does anyone know what the cut off point is when a facility needs to have a flare to deal with relief events? Obviously small plants do not need a flare because the relief load is low, but where is that cut off point. Regards The scientist describes what is; the engineer creates what never...

Hi, Does anyone have experience of substances which can react exothermically with Activated Carbon? For example, when scrubbing a multicomponent gas through an AC filter at ambient temp, the temp of the carbon bed starts to rise rapidly. Regards PR The scientist describes what is; the...

Hi All, I have an inerted vessel which normally contains a dry solid powder at above its auto-ignition temperature. The current design is a bursting disc only, vent goes to atmosphere at ground level. This will obviously catch fire as soon as it relieves so we want to change the system to...

Hi All, Does anyone here have experience of recirculating flue gas back into the furnace chamber as a means of heat recovery? The concept is that combustion is only required to raise the exhaust temperature back up to furnace temperature set point, the gas will continuously recirculate with...

Hi All, I need to calculate evaporation losses for an non-insulated Naphtha storage tank in a climate where temperatures can be 35-40C throughout summer. Significant proportion of n-pentane and iso-pentane in the fuel. Would preferably like to use HYSYS for this, the current model I've done...

Hello all, Is it possible to let down compressed gas from a 300barg cylinder to <1barg with a single stage regulator? Its a very low flowrate (20Nm3/hr). If I need an expensive let down skid the concept is stuffed so hopefully its a conventional operation. Cheers, PR The scientist describes...

Hi All, I'm doing the process design for a small new build facility, a near replica of an existing plant we have. The existing plant was designed by another party who just sized everything for the fire case without, I suspect, thinking too hard about what our credible worst case actually is. In...

Does anyone know if it is possible to carry out basic vibration measurement on a piping system which is insulated without removing the insulation? Kind Regards, PR

Hello all, I'm currently completing a study whereby I'm looking to rule out the possibility of surge occurring in certain systems. The valves in question are ESDVs on large bore lines (24") and I have the data sheets which specify achieved closure times of 25s. The pressure originates from a...

Hello, I want to install an RO upstream of a control valve to limit the max flow to relief valves downstream for the relief case which is control valve fails open. Does anyone know of any issues or problems with installing the RO upstream instead of downstream of the control valve? Thanks, PR

Does anyone know of any good design guides for designing desiccant air dryers? We are doing some pipework repair around an instrument air dryer and I am looking at the job from the process point of view. My main aim is to size the regeneration inlet orifice required. To do this I need to...

Hello all, This query is fairly non technical so should be simple if anyone has ever had the same issue before. I'm preparing Rev C P&ID's for a project. Part of the destruct scope will not be done in the normal way of cut and remove because much of the pipework is underground. This...

I have been tasked with selecting the line size for a new piece of pipework carrying process water. I can get flow rates, typical viscosities and densities and an idea of the pipe length/route. How should I proceed in calculating the minimum line size? At first glance I see that I may be...