Products and Services available in the MCH group

The MCH group of companies provide a wide range of services to the process industries. These services cover process design, process control, safety instrumented systems, SIL assessments, ATEX and DSEAR risk assessments, safety advice, HAZOP studies, pressure relief system sizing, consultancy, troubleshooting and a range of process plant related training.

Process Design

Rowan House Ltd has extensive experience of process design in a range of industries and covering a wide range of differing equipment types. In particular, specific expertise exists for the following unit operations and functional equipment:

HAZOP studies

HAZOP Service - We offer a complete and flexible HAZOP management service, from Hazop secretary-only support (a graduate chemical engineer) to full HAZOP management utilising our own HAZOP software based on the Institution of Chemical Engineers practice, including providing the HAZOP secretary and chairman and undertaking HAZOP preparation, progressing and tracking actions through to the issuing of the final report. HSE research, published in their book 'Out of Control', shows that 60% of all process industry accidents can be traced back to errors in the design and specification. HAZOP study is a recognised technique for checking the process plant design. HAZOP became best practice throughout the UK following the Flixborough disaster and became fully used in Europe and the USA following the Seveso disaster. HAZOP is applied worldwide following Bhopal. The legal framework for the application of HAZOP studies throughout Europe is covered by the Seveso directives and, following the implementation of Seveso II, HAZOP studies should be applied to all process plant in all industries. For more information see:
  • HAZ1508
  • HAZARD & RISK ASSESSMENT HAZ1508 is the award winning HAZOp study software that combines SIL assessment into the HAZOP study to help you eliminate unnecessary high cost high reliability safety instrumented system trips. High Integrity Safety Critical Instrumentation is expensive. It is expensive to buy, to design, to proof test and expensive to maintain. HAZ1508, the award winning HAZOP software from Rowan House, enables the user to identify potential Safety Critical Instruments and optimise the other possible layers of safety so as to minimise the number of high-cost safety critical loops under BS EN 61508. Risk graphs specific to your use can be installed into the HAZ1508 software that allows the HAZOP secretary to automatically calculate the potential SIL ("Safety Integrity Level") for a safety loop if the design is left unaltered. For more information see: HAZ1508

    Process Control

    A basic process control system (BPCS) can be a proprietary distributed control system (DCS); or programmable logic controllers (PLCs) or a combination of both linked to management information systems in the office environment. It invariably forms part of a supervisory control and data acquisition (SCADA) system so that monitoring 24 hours a day in various plant locations either on site or remotely. Which ever of these systems you require we can help you design, build, configure and support them. Part of that assistance will focus on process safety, using an overall approach that follows BS EN 61508 and IEC 61511 standards to design in process safety at all levels to reduce the need for safety instrumented systems. But if you do need a safety instrumented system we can also help you design that. (BS EN 61508/IEC 61511/UKOOA Guidelines ) The integration of the process control systems with the office systems brings new risks to the control system as most office systems have wide spread access to the Internet - with its risk of hackers and viruses as well as spyware and worms. We have experience of designing system architectures to reduce significantly the risk of your control systems being attacked. MCH Konsulting has over 25 years experience in deliver process control systems. MCH Konsulting delivers complete control systems based on ABACUS4. We have many years experience of control in the Pulp & Paper, chemicals, boiler and water/waste water industries. The ABACUS4 system is the fourth generation of the original abacus control system developed by the Babcock group of companies and offers unparalleled stability and proven control strategies. A wide range of process I/O systems from direct I/O interfaces through PLC outstations to safety certified PLC I/O MCH Konsulting has experience that is available to you. ABACUS4 displays can be run on Windows, Mac, Unix or Linux machines. The architecture allows the full and true meaning of distributed control to be realised. The abacus4 operator interface software includes:
  • Real Time Trends
  • Journal display
  • Alarm summary
  • Alarm system - WAP & web based display of alarm satus for remote access. SMS messages sent out on selected alarms.
  • Report displays
  • ABACUS4 is the ideal DCS that can link together your process control with the safety instrumented systems in a way that is completely transparent to the operator but maintains the segregation demanded under the design requirements of IEC61508 and its related sector specific standards.

    Safety Instrumented Systems

    Rowan House can guide you through every aspect of your safety instrumented system requirements and designs. Rowan House are gaining CASS certification under the UKAS accreditted system for functional safety management. Rowan House are members of the 61508 Association and Clive de Salis, MD of Rowan House was the first chair of this UK body for safety instrumented systems. For more information see: Safety Instrumented Systems

    SIL assessments

    Rowan House can undertake SIL assessments for your process. A good SIL assessment, properly calculated and calibrated can focus the safety trips onto the minimum essential trips required to keep your process safe and meet your corporate risk targets. To determine if a SIF is required to reduce risk to a 'Tolerable' level and the amount of risk reduction that any identified SIF is to achieve requires a method that is 'calibrated' to the risk risks associated with the application. The standard BS IEC 61511 for the process sector identifies several methods - risk matrix, risk graph, Layers of Protection Analysis, (LOPA). In order for a risk matrix and a risk graph to be applicable to the application it needs to be 'calibrated' for that application. For more information see: Risk Graph development

    ATEX and DSEAR risk assessments

    Rowan House Ltd has used their considerable experience in safety to develop a range of customer support packages to enable your company to understand, apply and meet the requirements of UK Health and Safety Legislation. EU and UK regulations. Dangerous Substances and Explosive Atmospheres Regulations = DSEAR ( EU directives ATEX 95 & 137): EU ATEX Directives 95 & 137 and their implementation in Europe and the UK is a requirement since July 2003. For more information see: ATEX The classification of hazardous areas is now based upon the 'ATEX' approach (link to the ATEX section). Where the risk is due to gases and vapours, then the approach is detailed in BS EN 60079-10: 2003 Electrical apparatus for explosive gas atmospheres. Classification of hazardous areas. Hazardous areas due to gases and vapours are classified as zones 0, 1 or 2 depending generally on whether the release is always present, present periodically during normal operations or not present during normal operations but present at other times. Rowan House can provide the HAZARDOUS AREA ZONING that you need. Rowan House can also provide the expertise to undertake the hazard and risk assessment for all process plant. Rowan House are well positioned to help you gather the chemical safety data that you need and make the appropriate risk assessment s for developing a strategy to optimise safety in the workplace. For more information see: HAZARD & RISK ASSESSMENT

    Pressure Relief Systems

    Rowan House Ltd has undertaken a substantial amount of work on RELIEF SYSTEMS, their design and their performance. This experience has been gained on relief systems for vapour and liquid operations and explosion relief systems for DUST EXPLOSIONS. LPReliefClean is a highly accurate Low Pressure relief system that never chatters and always re-seals and this minimises the volume of gas released. During a pressure relief incident the exhaust gas is scrubbed and this cleans the gas released. LPReliefClean can handle foam and slurry mixed with gas as well as clean gas. For more information see: LPReliefClean

    The environment and Dispersion calculations

    Rowan House can provide the prediction of downwind ground level concentrations from stacks for you in order to ensure that the proposed combination of stack height and exit velocity will achieve a low enough downwind ground level concentration under all likely wind speeds, directions and prevailing weather conditions. Local authorities often have a database of measured background levels of common atmospheric pollutants but often exercises such as IPC/IPPC authorisations may need some measurements to be taken of the background level. If you need assistance with organising such a programme for measuring the background levels of pollutants downwind of the stack, then contact Rowan House Ltd. For more information see: ATMOSPHERIC DISPERSION It also matters what it is that is being released from your stack. It could be SOX, NOX, CO, CO2, dioxins, whatever the flue gas composition there is constant pressure upon operating companies to improve environmental performance and reduce emissions and Rowan House can help. For more information see: ATMOSPHERIC POLLUTANTS Rowan House also have experience of the preparation of IPC/IPPC authorisation documentation and the related work on characterising pollutants emitted, steps to reduce the emissions of these pollutants and the analysis of atmospheric dispersion of these pollutants. For more information see: ATMOSPHERIC EMISSIONS & IPC / IPPC