1800mm Deck Decompression Chambers DDC

Over the last few years we have seen the increase in popularity of larger diameter Deck Decompression Chambers (DDC’s). Initially any enquiries for chambers larger than 1500mm (60 inches) would have exclusively come from the Scandinavian region but now we are finding that diving contractors from all over the globe are showing interest in our 1800mm (72 inches) chamber. IMCA have recently revised their D023 guidelines:

” Any chamber manufactured after 1 January 2015 should have a minimum internal diameter of 60 inches if using imperial measurements or 1500mm if using metric measurements. Chambers manufactured before this date do not need to meet this size requirement. “ 

But for some people bigger is better.
Diver Decompression Chambers

Due to the increase in demand we at SMP now stock 1800mm DDC shells at our Preston workshop ready to fit out. This greatly reduces project build times for our customers. We supply the chambers as free-standing units but more commonly as containerised systems ready to deploy anywhere in the world. We have standard designs like the example shown below which fit into 20 foot ISO containers to keep mobilisation and shipping costs to a minimum. We also produce bespoke systems and our sales and design teams are on hand to consult with clients to produce high quality solutions, supplying computer generated realistic views of the systems prior to build.

Diver Decompression Chambers

Our DDC shells are built in the UK to the design code PD5500 : 2009 CAT1 and are certified by Lloyds Register of Shipping and they have a depth rating of 100 Metres.

All of our diving systems are designed to meet and exceed IMCA safety standards for offshore use.

Please contact our sales team for further information.

Enquire about our DDC’s

Please call +44(0)1772 687775 for advice, availability and pricing.

Our customer care is available 5 days a week.

Mon – Fri: 
9am – 5pm
Sat – Sun: Closed

You may also contact us at any time with an email

SMP Diver Decompression Chambers

SMP design and manufacture a wide range of Diver Decompression Chambers (DDC’s) and Hyperbaric Chambers used for Hyperbaric Oxygen Therapy (HBOT).

These are commonly used by divers, medical practices and sporting institutions.

We have 1.8 metre Twinlock DDC’s available for delivery within the next few weeks.
These can be supplied as standalone DDC’s or containerised within 20ft ISO / DNV Containers that meet current IMCA regulations.

Please call +44(0)1772 687775 or email sales@smp-ltd.co.uk to discuss your requirements and specifications.

Diver Decompression Chambers
Diver Decompression Chambers
Diver Decompression Chambers

If you are interested in purchasing a Diver Decompression Chamber please contact us to discuss your requirements.

Tel: +44 (0)1772 687775
Email: sales@smp-ltd.co.uk

SMP Diver Decompression Chambers (DDC)

We have 2 standalone Diver Decompression Chambers available for delivery from December 12th 2014. 

Please call +44(0)1772 687775 or email sales@smp-ltd.co.uk for full specifications, pricing, options and delivery information

SMP DDCSMP Twin Basket Hydraulic Diver Launch & Recovery SystemSMP DDCSMP DDC

If you are interested in purchasing a Diver Decompression Chamber please contact us to discuss your requirements.

Tel: +44 (0)1772 687775
Email: sales@smp-ltd.co.uk 

Commercial Diving Transfer Under Pressure (TUP) System

SMP’s well established manufacturing and design teams have recognised the requirement of the next step to extended bottom times with air, nitrox and mixed gas diving with the ever increasing demands in the renewable, oil and gas sectors in the offshore industry.

SMP have developed a solution for a closed Bell TUP System which will be a unique one-off design available to interested parties. This system is configurable to client requirements on a short lead time.

Transfer Under Pressure System

The system provides a cost effective diving solution through increased bottom times for the diving teams. This provides the capability for the diving team to be working from a Schedule 6 type Bell whilst the second team will be in decompression after completing their bell diving operations.

This will mean continual productivity from the diving bell teams with less down time and smaller diving crews that would be utilised with normal air and nitrox diving.

Transfer Under Pressure System

The system utilises a minimum 4.5 m3 saturation diving bell which has the capability of bounce diving operations. This is critical to the utilisation of this system. The diving bell can be lowered to the seabed under atmospheric conditions. When the divers arrive at the work site the supervisors will have the capability to pressurise the diving bell equivalent to the work site depth which will allow the divers to exit the bell to proceed with their tasks. This can be a single diver or two diver lock out with a standby diver remaining in the bell.

Transfer Under Pressure System

On completion of the dive the divers will return to the diving bell where the doors will be sealed. At this stage the divers in the bell will start their decompression procedure. The bell will then be recovered to the surface with the divers continuing their decompression within this controlled atmosphere. The bell will be recovered by the handling system into the bell capture arrangement thereafter manipulated onto the bell handling trolley for mating to the divers transfer lock.

The above process allows for much greater productivity with diver’s bottom times, a more controlled and safer working environment and quicker and safer decompression procedures as opposed to the regularly used oxygen surface decompression procedure.

Transfer Under Pressure System

TUP System – Features and Specifications


  • L : 40’ (12 mtr) x W: 11.8’ (3.5 mtr) x D: 11.8’ (3.5 mtr)
  • Weight: 38,000 kgs
  • 2 x Personnel Doors
  • 2 x Heating and Air Conditioning Units
  • 4 x Gas and Air Penetrator Plates
  • 1 x Electrical Penetrator Plates

DDC and TUP:

  • Side Mating Manway and End Mating to SDC (Bell)
  • Divers Transfer Lock with toilet and shower facility
  • 1.8 mtr Twin Lock Chamber for Diver’s Decompression Treatment
  • Built in Master Control Panels
  • Capacity for 8 persons in the Twin Lock Chamber and 3 persons in the DTL
  • System currently rated to 50 mtr SWD but can be re-rated to 18 Bar 180 mtr (590 fsw)
  • Medical Locks and Chamber and DTL
  • Chamber and DTL outfitted with Comms, Lighting, Gas Analysis, CCTV Systems, Cooling/Heating, Scrubbers

Other Equipment:

  • LP Air Storage System
  • Fire Suppression System
  • Electrical Breaker System
  • Distribution Panel
  • Transformers and Battery Back Up Supply

For more information on the TUP system please use the links below:

Our Sales Team and Technical Advisors from our UK office are available to offer help on any questions relating to this system. Please call +44 (0)1772 687775 Mon – Fri (9am – 5pm). Alternatively email sales@smp-ltd.co.uk and we will get back to you.

Containerised Dive Control & 54inch DDC within 20ft ISO Container for Sale

We currently have available for purchase a used hire container with DDC and Dive Control which has recently been returned to us. This Twin Lock 54” Deck Decompression Chamber is installed within a 20ft ISO container and is available to purchase with full certification package. Only 1 in stock so sold on a strict first come, first served basis.

The DDC is in full working order and ready to be mobilised into a working environment


  • 54” twin lock DDC c/w medical lock and necessary accessories
  • Installed within an insulated 20ft ISO shipping container
  • Container includes lighting and electrical sockets
  • Container air conditioning
  • Side personnel door in container
  • Bulkhead behind container double doors
  • 3 diver panel with gas monitoring

If required we can customise or modify the container to your specification.
Please call us on +44 (0)1772 687775 or email sales@smp-ltd.co.uk if you have any enquiries.

SMP Diver Decompression Chambers – DDC

We have 2 standalone DDC’s available for delivery from June 23rd.

Please call +44(0)1772 687775 or email sales@smp-ltd.co.uk for full specifications, pricing, options and delivery information

SMP Twin Basket Hydraulic Diver Launch & Recovery System
SMP Twin Basket Hydraulic Diver Launch & Recovery System
SMP Twin Basket Hydraulic Diver Launch & Recovery System
SMP Twin Basket Hydraulic Diver Launch & Recovery System

If you are interested in purchasing any of our Diver Decompression Chambers please contact us to discuss your requirements.

Tel:+44 (0)1772 687775
Email: sales@smp-ltd.co.uk

Lots more commercial diving equipment available to purchase or hire. www.smp-ltd.com

SMP Complete Shortened 60″ Divers Decompression Chamber (DDC)

This week Submarine Manufacturing & Products Ltd are pleased to announce the completion of a shortened version of their standard 60″ DDC.  The bespoke chamber has been produced for installation on custom built dive support vessel (DSV) for a UK based commercial diving contractor.

The shortened diving chamber design is Lloyds approved and also meets IMCA D 023 for Design for surface orientated (air) diving systems.

This skid mounted twin-lock chamber can be supplied either as a stand alone DDC or alternatively can be containerised inside a 20″ ISO container with integrated dive control panel and gas storage.

For more information on the range of containerised dive systems that we offer please visit our website using the following links:

hyperbaric chambers

containerised dive systems

commercial diving equipment

SMP Supply High Demand From Commercial Diving Contractors

In recent months, we have noticed a considerable increase in worldwide demand from commercial diving contractors for commercial diving equipment.

In particular we have been quoting a lot of commercial diving air systems for commercial diving contractors who require large diving equipment as a result of winning offshore diving contracts.  For example we recently received an order from Africa for a complete diving system including containerised hyperbaric chamber and air diving control panel, machinery container with HP and LP breathing air compressors and HP gas storage, hydraulic diver launch and recovery systems, Kirby Morgan diving helmets and Bandmasks.

As a member of both IMCA (International Marine Contractors Association) and ADC (Association of Diving Contractors), we are well known to commercial divers and commercial diving contractors wthin the UK, Europe and throughtout the world.  In the last 12 months we have fielded enquries from over 100 different countries throughout the world.

Our Facebook page contains over 4,000 commercial divers and commercial diving contractors throughout the world.  To view our Facebook page visit: SMP Facebook Page

Hyperbaric Chambers Video

We have created a video of our hyperbaric chambers using a collection of professional photos Hyperbaric Chambers Manufacturer UK

60" Twin Lock Hyperbaric Chamber

60" Twin Lock Hyperbaric Chamber

For more info on our manufactured hyperbaric chambers please visit: Hyperbaric Chambers

SMP Underwater Cutting Rods

SMP Underwater Pro-Thermic Cutting Rods

SMP Underwater Pro-Thermic Cutting Rods

We cuurrently have around 175 boxes of underwater cutting rods in stock available for next day delivery subject to availability.  Our cutting rods offer exceptional performance and value for money when compared with other cutting rods on the market.  Our competitors offer cutting rods in quantities of 66 rods per box at a similar price to our rods which come in quantities of 100 rods per box.  Therefore our rods offer around 33% more rods which is a significant cost saving, especially when buying multiple quantities.

For information visit: SMP underwater cutting rods

In addition to cutting rods, we also sell cutting torches, namely the Broco BR-22 Cutting Torch.

Broco BR-22 Cutting Torch

Broco BR-22 Cutting Torch

For more information please visit: Broco BR-22 Cutting Torch