Chemical and Process Engineering




Clients & End Customers


Case Studies

Contact JBL







A S Jessup-Bould:











I can produce detailed Piping and Instrumentation Diagrams representing equipment, interconnecting pipework, instrumentation and control loops complete with tagging of instruments, line sizes, line material / insulation, line fluid etc.


Heat and Mass Balances

I can produce heat and mass balances deriving them from either hand or spreadsheet calculations as appropriate. 


Process Data Sheets

I can provide specifications in the form of data sheets for most types of process equipment. I can provide process information for instrumentation data sheets and produce system trip and interlock ("kiss") charts (cause and effect diagrams).



In addition to heat and mass balance calculations I have experience in a range of other process calculations: These include; pressure loss (liquid and gas, including safety relief systems), heat transfer (exchangers, vessels, direct contact), combustion (gases, liquids, solids), gas scrubbing and stripping, distillation, utility requirements.


Equipment Specification and Bid Appraisal

I have prepared process specifications (eg data sheets) and carried out technical bid appraisals for a wide range of process equipment including; pumps, fans, heat exchangers, vessels, pipework, columns, agitators. I have also provided process specifications for instrumentation, control valves and relief valves.

Specifications have generally included definition of the process duty, process constraints or special considerations, materials of construction, utility conditions.





Hazard Identification and Assessment

I have experience in producing process hazard and safety integrity assessments and the use of hazard severity methods. I have applied these skills in fine chemicals and energy from waste projects.




Hazardous Area Classification




I can carry out hazardous area classifications for flammable vapours and dusts. I have experience in using BS5345 Pt2, BS EN 60079 Pt10, IP15, IGE/SR/25, BS6467 Pt2, BS50281-1-2.

I have carried out hazardous area analyses on coke works' by-products plants, sewage works (including digesters and thermal hydrolysis plants), large battery installations, fuel storage and natural gas applications.


Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\HAC1.JPG

I have produced guidelines and provided presentations on hazardous area classification for my colleagues. I am aware of the need for risk assessments in the Dangerous Substances and Explosive Atmospheres Regulations 2002 and have carried out risk assessments where explosive atmospheres may be present.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\ExDiagram.JPG





I have both facilitated Hazard and Operability Studies and participated in others as the Lead Process Engineer.

As an independent Chairperson, I have familiarised myself with Client's proposed processes, and their existing practices in terms of plant design and operation before embarking on the HazOp. As a result I have been able to provide appropriate guidance for the Team enabling the study to be executed in an efficient manner.

I am able to work with manual recording systems and I have used Lihou HazOp software.


Pressure Systems Regulations and Pressure Equipment Directive

I have carried out the assessment of pressurised systems to ascertain requirements for compliance with both the Pressure Safety Systems Regulations (PSSR) and the Pressure Equipment Directive (PED). I have checked manufacturers' PED assessments and ensured that the correct documentation has been provided in accordance with PED.

For PSSR assessments I have account for the nature of the fluid, eg steam, compressed gas, its containment volume and maximum working pressure.

For PED I have taken in to account the class of fluid contained by the equipment / pipeline / assembly, the size of containment (eg volume or pipe diameter) and its design pressure. This has enabled classification as either Sound Engineering Practice (SEP) or one of the categories (I to IV) that require CE marking. The purpose of classification being to determine, through the use of PED modules, the level of inspection and control during manufacture, and the records to be kept.


Safety Relief Systems






I have designed and checked safety relief systems using API520/521, BS6759 and the IChemE Relief Systems Handbook. My work has included determination of relief scenarios and required relief rates. I have undertaken calculations for set pressure, checks for satisfactory re-seat pressure, relief valve size and line sizing to meet acceptable inlet and outlet pressure drops for relief valves / bursting discs.

I have raised the appropriate documentation for the systems being considered, whether as part of a process hazard assessment or through the use of RST forms. I have designed relief systems for a variety of process fluids including compressed and liquefied gases and for emergency venting of batch reactors.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\SRV01.JPG



I have assessed over and under pressure protection requirements for existing relief devices installed on offshore and onshore natural gas facilities. The assessments included relief scenario identification, calculation of required relief rates and calculation of the rated capacity of the relief devices. Scenarios included pool fires under vessels resulting in vapour relief from boiling liquids, gas relief due to thermal expansion and the identification of the risk of vessel failure below the set pressure of the relief valve. Some scenarios led to 2-phase relief and the relief of supercritical fluid.

I contributed to PSHEG8 (a basic industry reference on the engineering of relief systems published by ABB) incorporating guidance on the changes between the 5th and 6th Edition of API 521.

I established the “Relief Club” at ABB as a lunch-time forum for improving aspects of technical know-how and efficiency of assessment in the field of safety relief systems for the benefit of ABB as a company and the personal development of Engineers working at ABB.










Operating Instructions

I have written operating instructions for a variety of plants including sludge incineration and flue gas cleaning, sewage sludge digestion and coke oven byproducts.













I have provided formal classroom and practical on-the-job training for personnel at a number of process plants including developing countries. These include tar and benzol refineries, coke oven by-products and incineration. I have also provided training documentation for flue gas cleaning and sewage sludge drying plants.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\ZCR_Training.JPG



I have had hands-on commissioning experience both in the UK and in Africa on coke-works by-products plants and refineries. I have also worked as a shift team leader for a sewage sludge incineration facility.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\GLDTeam.JPG














I have had experience in the use of proprietary software for process flow sheet simulation (Hysys) and various heat exchanger thermal design programs.

I am also versed in Microsoft Word, Excel and PowerPoint as well as Lotus Notes.

Whilst working at Johnson-Hunt Limited I provided programming expertise for their mechanical design software. Furthermore I was responsible for administering the Prime computer system used for engineering design and CAD.














Heat Exchanger Thermal & Mechanical Design






I can specify and carry out the detailed design of tubular and plate heat exchangers. I spent over 3 years working as a design engineer for a leading UK manufacturer of shell & tube and plate heat exchangers. As well as using proprietary thermal design software from HTFS and the PPDS physical properties program I used in house software for mechanical design purposes to BS5500 and ASME Div 1.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\Image27.jpg



I was also responsible for expanding the company's in-house software library for mechanical design (eg shell and nozzle design to BS5500, nozzle loadings to BS5500 and WRC, saddle supports to BS5500). I also wrote software mechanical data sheet preparation which enabled automatic extraction of stress data for use in mechanical design programs.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\Image26.jpg

It should be noted that in-house mechanical design software was not only subjected to in-house verification, but the calculations performed using this software were checked by outside agencies for insurance purposes.

Description: Description: Description: Description: Description: Description: C:\JBL\0HTML 2014\PHE.JPG


















I have provided Process Engineering input to tenders in the form of process descriptions, writing of technical appraisals, calculation of utility requirements and process guarantees.