Written Schemes

A Written Scheme of Examination (WSE), is a legal document required prior to use of Pressure Systems. This is legislated by UK regulations detailed in Pressure System Safety Regulations (PSSR) 2000. It details items within a Pressure System that necessitate examination by a competent person.

As specified in Regulation 8.1 of PSSR “The user of an installed system and owner of a mobile system shall not operate the system or allow it to be operated unless he has a Written Scheme for the periodic examination, by a competent person”.

HSE defines competency as “the combination of training, skills, experience and knowledge that a person has and their ability to apply them”.

The Competent Person will identify which items of the pressure system fall within the scope of the WSE, such as pressure vessel, protective devices and pipework. Once these items have been established the frequency of examinations will be outlined.

As part of PressureSafe we will train your engineers to undertake examinations in line with PSSR 2000. The examination is one element and they will not be able to create or sign off a written scheme. By working in collaboration on minor system for a small charge we can create a dual branded written scheme using our chartered engineer and the information your examining engineers has taken.

The following types of pressurised systems are likely to require a WSE:

  • Compressed air systems where the vessel has a pressure volume product greater than 250 bar litres (This is calculated by multiplying the operating pressure of the vessel in bars by the size of the vessel in litres – bars x litres )
  • Steam sterilisation autoclaves
  • Coffee machines with steam boilers
  • Rigid vessels over 250 bar litre, this includes expansion vessels and separators
  • Pressure cookers
  • Gas-loaded hydraulic accumulators, if forming part of a pressure system
  • Portable hot water/steam-cleaning unit fitted with a pressure vessel
  • Vapour compression refrigeration system where the installed power exceeds 25 kW
  • Steam boilers, including standard or narrow-gauge steam locomotives
  • The components of self-contained breathing apparatus sets (excluding the transportable pressure receptacle)
  • Fixed LPG storage systems supplying fuel for heating in a workplace
  • Protective devices such as pressure gauges, safety valves, pipework, level indicators, pressure and temperature switches


The WSE must remain relevant to the pressure system it relates to and therefore requires periodic reviews. Frequency of reviews may vary depending on the competent person.

Read Mandate Systems Discussion On Pressure System Safety Regulations

The Pressure Systems Safety Regulations 2000 (PSSR), ACoP has a legal status; “if you are prosecuted for a breach of health and safety law, and it is proved that you did not follow the relevant provisions of the code, you will need to show that you have complied with the law in some other way or a court will find you at fault”.

What our customers have to say….

Frequently Asked Questions

Mandate Systems is packed with guidance and advice on pressure systems safety, but we have also provided answers to some frequently asked questions. Please let us know if there is a question you would like the answer to that isn’t listed here.

Your engineers will be trained by experts who are well versed in the Pressure Systems Safety Regulations 2000 (PSSR) and understand what are yours and the customers obligations to be compliant.

You will be able to offer a one-stop-shop to your customer by not only supporting the supply and service of pressure systems, you will also be able to offer minor system statutory examinations and by working in collaboration with us, provide a written scheme for your customers.

This will provide your company with an additional revenue stream, take the hassle out of compliance for your customer and with our competitively priced offering, allow you to be competitive with attractive margins.

Engineers should have a minimum of 6 months pressure experience. For example they should already know the basics such as making equipment safe, interpreting data plate information and with an understanding of mechanical equipment.

We have a range of date options available for engineers to attend a day’s zoom training. This is interactive with live polls, discussions and breakout group tasks along with workbook activities.

Day 2 is made up of online assessments with one invigilated multiple choice exam and two open book assessments to submit remotely.

Once your engineers are fully trained and passed our IOSH assessments they will be provided system logins and have access to our technical engineer and experience examination engineer surveyors who can support them remotely as an when required.

All reports are independently checked and we have a 5 star rating where all reports submitted are quality checked, where required details are fed back to the engineer to upskill and your allocated manager will be made aware for quality assurance.

Our training is based on non destructive examination tests on compressed air, receivers, safety devices, autoclaves and accumulators.

You are responsible to ensure the engineer has competent skills and is familiar with the equipment you specialise in.

Our engineer examination training is certificated by IOSH, an official award certificate will be issued after successfully passing the 3 assessments. The course also qualifies for CPD points (continual professional development).

As part of your annual PressureSafe subscription payment, it provides access for trained engineers to our bespoke portal. This is cloud based allowing your engineers to log on whilst onsite, 24/7 and captures all examination details. Once stored the information is then saved and is available for you to refer back to each year, making subsequent visits quicker.

To meet the Pressure Systems Safety Regulations and produce a written scheme you need to be classed as a competent person based on experience and knowledge and also depending on the type or equipment be IEng or Ceng qualified.

For service providers who want to create a written scheme, we can work in partnership with you to produce a dual branded written scheme. This will incur additional fees at pre agreed rates.

Initially we set up for the service partner to have access to the portal with your customers linked. This allows you to manage annual renewals of examinations. You can share details with your client to log in and only view their report. We are here to support and can agree briefing and set up at the onset.

We do offer a reduced rate training for those signing up to our PressureSafe membership, however if you just wish to book engineers, managers of pressure systems, or H&S personnel onto our course for greater depth knowledge, this is certainly an option and something that we have done many times in the past.

Our training and membership rates vary based on the volume of engineers, we are happy to provide you an accurate pricing by emailing pressuresafe@mandatesystems.com or calling 01274 691091.

It certainly is an option to be a PressureSafe member without attending our training, all we ask is for a copy of the training certificate from another recognised training provider. This must have been undertaken within the last 3 years.

We have been in operation for over 30 years and for the last 10 have worked in partnership with many leading service providers. This was based on undertaking examinations and written schemes on their behalf or supporting them via PressureSafe. We are trusted and honourable with good T&C’s to be fair and transparent. Our reputation is key and we are not a company who will condone or act in an underhand way.