Individual cylinders
For limited or distributed duties where manual changeover is workable.
HE-O1 / Diving gas solutions
Helium supply for commercial and saturation diving.
The supply route is planned around the approved diving operation, gas or mixture, cylinder configuration, expected consumption, analysis requirement and replenishment window.
Build the project brief ↓
01Approved specificationNo default heliox or trimix composition is assumed.
02Analysis & identityGas records, labels and acceptance checks are planned together.
03Offshore continuityConsumption, reserve, port call and return route are defined early.
Designed around the operation
Two diving contexts, two different supply briefs.
The mixture and physical asset do not stand alone. The operating method, reserve philosophy, transfer plan and acceptance procedure determine whether the full route works.
Commercial diving / Heliox & Trimix
Prepare the gas against the approved dive plan.
Commercial diving may call for pure gases or project-specific helium mixtures. Composition, tolerance, filling pressure, identification and analysis are confirmed from the approved specification rather than from a default online blend.
- Application
- Dive method, working depth and approved gas plan
- Gas or mixture
- Mixed and analysed against the approved project specification
- Format
- Individual cylinders, pack or offshore quad under review
- Continuity
- Consumption, reserve, changeover and port-call plan
Saturation diving support
Treat reserve and replenishment as part of the system.
Saturation support typically raises the importance of stored volume, mixture control, gas analysis, identification and continuous project logistics. The gas route is evaluated with the diving contractor and the approved operating documentation.
- System interface
- Storage, control panel, manifold and connection
- Composition control
- Approved requirement, analysis method and tolerance
- Reserve policy
- Minimum gas, contingency and replenishment window
- Acceptance
- Identification, certificates, sampling and receiving checks
Technical requirement table
Confirm the fields before confirming the hardware.
The table is a project-input structure. It deliberately does not publish a default blend, tolerance or Lesoo fill specification.
| Requirement | What must be confirmed | Specification status |
|---|---|---|
| Intended application | Commercial, surface-supplied or saturation-diving operation and approved work scope | Project-configured |
| Gas or mixture | Pure gas or mixture named in the approved project specification | Project-configured |
| Composition requirement | Target composition and permitted tolerance supplied by the responsible project party | Technical confirmation |
| Purity requirement | Base gas and impurity limits, plus the required analysis method | Technical confirmation |
| Filling pressure | Selected cylinder or quad, temperature basis and destination requirements | Destination-dependent |
| Cylinder / quad format | Cylinder count, frame, lifting set, manifold, isolation and handling route | Project-configured |
| Valve & connection | Gas compatibility, destination, regulator interface and operator requirement | Destination-dependent |
| Analysis | Sampling point, method, frequency, reporting and acceptance responsibility | Project-configured |
| Documentation | Gas analysis, cylinder and asset identity, inspection records and delivery documents | Project-configured |
| Consumption & reserve | Expected usage, minimum reserve, contingency and changeover plan | Project-configured |
| Project location | Filling point, port call, vessel, offshore destination and return route | Destination-dependent |
Final composition, purity, tolerance, pressure, connection and documentation must be accepted by the responsible project parties. This page is not a breathing-gas approval or certificate.
Supply configuration
A quad is a system, not just a cylinder count.
The frame, cylinders, lifting set, manifold, isolation, outlet, inspection route and project handling method must be evaluated as one configuration.
Cylinder bundles
For common-manifold supply with defined onshore handling.
Offshore quads
For framed, liftable assets selected around offshore transport and inspection.
Project replenishment
For reserve, port call, turnaround and return planning across the operation.
Market examples
Use public references carefully.
One official offshore supplier publishes both 16 × 50 L and 64 × 50 L quad examples at 300 bar. That evidence shows available market patterns, not a universal design or a Lesoo specification.
| Supplier example | Cylinder water capacity | Published pressure | Public-page status |
|---|---|---|---|
| 16-cylinder quad | 16 × 50 L / 13.2 US gal each | 300 bar / approx. 4,350 psi | Example configuration |
| 64-cylinder quad | 64 × 50 L / 13.2 US gal each | 300 bar / approx. 4,350 psi | Example configuration |
External dimensions, tare weight, manifold, outlet, lifting set and certification are intentionally not inferred. They are confirmed from the selected asset.
Documentation & control
Gas acceptance continues after filling.
IMCA guidance covers supplier facilities, filling, mixing, analysis, composition controls, cylinder and quad identification, port-call transfer, receipt and acceptance. The project should assign each responsibility rather than rely on one certificate alone.
- 01Batch identificationConnect the gas to the fill and analysis record.
- 02Gas analysisConfirm method, result, tolerance and acceptance.
- 03Asset identityMatch cylinder, quad, inspection and lifting records.
- 04Delivery recordsTrack mobilisation, receipt, reserve and return.
Project brief
Start with the diving requirement.
Eight inputs give the technical and commercial review a useful starting point.
01Diving application
02Gas or mixture
03Required quantity
04Cylinder format
05Required pressure
06Project location
07Project start date
08Required documentation
Diving gas questions
Approve the mixture for the operation.
No single composition, pack or certificate replaces the project specification and acceptance process.
01Is there a default Heliox or Trimix composition?
No. The mixture and composition tolerance must be defined and approved for the specific diving operation, then mixed and analysed against that specification.
02Which supply formats can be reviewed?
Individual cylinders, manifolded supply and offshore quad configurations can be reviewed after the mixture, pressure, consumption and handling plan are defined.
03What documentation should be agreed?
Define gas analysis, batch or fill identification, cylinder or quad identity, inspection records, delivery records and acceptance responsibilities.
04Are the 16- and 64-cylinder examples Lesoo specifications?
No. They are public supplier examples. Final dimensions, weight, manifold, lifting set and certification are confirmed from the selected asset.
Reference basis
Guidance informs, the project approves.
Content reviewed 13 August 2026. IMCA material is industry guidance, not a Lesoo product certification.