Corporate Engineering is committed to providing a variety of quality merchandise for customers. By using the latest technologies and applying strict quality control procedures, we’ve become known for having the best products in the industry. Take a look at what we currently have in stock, and get in touch to order or learn more.

At Corporate Engineering, we’re confident you’ll be satisfied with our products. That’s because we use only the highest quality materials and top-of-the-line technologies. Take a look at our inventory below, and feel free to contact us if you’re looking for something you can’t find here. A member of our team will be happy to help.

The selection of products manufactured by Corporate Engineering are not only of the highest quality, but are also available in a variety of options to ensure you find exactly what you’re looking for. With top-of-the-line materials, cutting-edge production technologies and a highly qualified team, we guarantee complete satisfaction.

Our Cover Directory

Our Glass Reinforced Plastic covers are specialised for the purpose, and we design and manufacture a wide range of GRP covers.


Browse our navigation menu, and decide what cover is best for you. Of course, all of our covers are specially designed and manufactured; whatever you see can be adapted for its use in your project.

For any inquiries regarding our GRP Covers, get in touch through our phone line on our About page, and we can provide a quote for you:


 the time that the quote will take is dependant on the complexity of your requirements, so please bear this in mind. 

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We have a section for our pitched covers

Beam and Infill

The beam and infill system offers a flexible solution to covering any shape of tank or chamber. The BI system pans up to 22 meters and is totally self-supporting. The system allows for covers to be fitted without the need for emptying or cleaning the tank as no access into the structure is required. As this is a modular system, covers can be built directly onto the structure, unlike other covers that need to be built on the ground and then lifted into position. An advantage on sites where space is at a premium. Corporate Engineering offers a full range of access manways, inspection and mixer hatches to suit your requirements. Flat areas for walkways can be included around hatches and equipment (if required). Different access loadings can be defined by contrasting colours. Covers can be manufactured to any British Standard or RAL colour. Beam and infill covers are supplied as a kit of smaller components making them easy to transport and install. Covers can be containerised for export.


No two inlet works are the same- each one needs to have covers specifically designed for it. Whether the covers are to fit a newly built inlet works or are to be retrofitted to an existing structure, Corporate Engineering can develop a design concept to suit.

For new works, we are happy to offer advice on the inlet work’s design to enable efficient covering to minimize odor escape. By following some simple guidelines, the efficiency of the covers can be increased dramatically while keeping costs to a minimum.

Even the most complex inlet works can be retro-fitted with odour containment covers. Corporate Engineering can visit the site and lead you through the preparation work that is required to allow GRP covers to be installed.

Where access for operations personnel is required, cover panels can be designed to support imposed loads of up to 5kN/m2. Slip deterrent surfaces and handrailing are normally supplied in these areas.


Corporate Engineering can provide examples of covers to:

  • Inlet wet wells

  • Screw pumping stations

  • Inlet screens

  • Distribution, by-pass and flume channels

  • Grit removal lanes

  • Fat Oil Grease and Grit (FOGG) lanes

  • Distribution Chambers


Pump chambers and wet wells can be quite complicated and difficult to cover effectively. Corporate Engineering can design covers that provide access for the safe operation and removal of pumps and other equipment while accommodating pipework penetrations and guide-rails etc.


Corporate Engineering Ltd.'s most recent rotating covers job was with Workington Wastewater Treatment Works; they required covers for their tanks following complaints from nearby residents claiming it had odour problems, mainly coming from hydrogen sulfide, most commonly described as 'rotten eggs'. This site is located on a coastal road and is high profile, due to its prominent location and visibility to the public. It was also the only possible location reported malodourous air could emanate from.


Corporate Engineering Ltd. covered this project five years prior- but it was apparent that the main source of the problem was coming from two 34 meter diameter primary settlement tanks and the activated sludge plant. As the primary tanks were fitted with half bridge scrapers, Corporate Engineering needed to design the rotating covers to a size that was outside of the boundaries the company had previously produced.


The ASP was not a significant problem, as CEL would utilise cover designs that have been in use for over 19 years.


For some applications, inspection hatches sometimes do not provide sufficient access to the contents or equipment below. Corporate Engineering have supplied many sliding covers to such areas. Sliding covers can solve some operational problems but can create several others. Odour tightness and safe operation are just two issues that need to be considered. Corporate Engineering can advise the best solution for each application. 


CEL only use components that can survive the demanding conditions found on all sewage treatment works. Any steelwork is stainless steel (Grade 316) and all running gear is similarly corrosion resistant.


Corporate Engineering’s standard GRP covers can be modified to incorporate fabric covers.

Fabric covers have been developed to meet the needs of operations personnel where large areas of a cover need to be opened for inspection and to give the operators a clear view of the process.

The operation of the fabric section is designed to be a one-person procedure and to require minimal effort. With only 3 moving parts, maintenance is kept to a minimum.

When closed, the fabric is tensioned to prevent ponding and ice formation.

Skip Enclosures

Screenings skips can be difficult to cover while allowing the skip to be replaced easily.

Corporate Engineering designs and manufactures simple GRP skip enclosures to suit the requirements of each site. The basic unit consists of corrosion resistant GRP panels that create the enclosure’s structure. PVC strip curtains at the front allow the skip to be easily removed and replaced. Enclosures can be adapted to incorporate grit chutes and ducting. Odour extraction pipework can be connected at any location to suit the site layout.


Corporate Engineering can also supply conical covers. Where simple odour containment covers are required and access onto it is not required, conical covers can be an economical option. Corporate Engineering are currently redesigning their range of conical covers and we hope to be able to offer covers to suit tanks from 5 to 16.22m diameter in the near future. Conical covers are now available up to 11.1m diameter, and covers up to 15m diameter are coming soon. Should you need more details regarding this, please do not hesitate to contact us.


Our Conical covers are designed in accordance with WIMES 8.05 and the relevant utility specifications. These also include standard duty (0.75kN/m2) to BS EN-1991-1-1:2002. Our structural design is verified using the latest FEA software, and any colour from the RAL or BS4800 ranges. This includes robust cover segments that are easy to handle and assemble. We can provide efficient stacking for economical transport, and access manways - hinged and lockable c/w removable stainless steel safety grille. The conical covers feature mixer and aerator hatches, and flanged upstands for odour extraction instruments. Air inlets c/w bird or insect mesh. 

Designed using 3d software

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