LPG Underground Tanks
KAF Cryogenics supplies LPG underground tanks for stationary storage in industrial, commercial and distribution applications. The tank is selected for the specified propane or butane service, capacity, operating conditions and installation requirements. Underground installation details are considered separately from transport tank and semi-trailer design.
Vessel Configuration and Gas Service
Capacity, usable filling volume, design pressure and temperature, vessel material and nozzle layout are established for the selected storage model. The overall LPG stationary family covers 5–200 m³; the available range for a particular installation type is confirmed separately. Relief, isolation and instrumentation connections are reviewed with the process requirements.
Installation and Corrosion Protection
Underground tanks require an installation-specific review of burial conditions, corrosion protection, coating, accessible fittings and inspection arrangements. Soil and groundwater conditions, tank restraint and site piping interfaces are part of the engineering review. A tank approved for aboveground use should not be assumed suitable for burial.
Standards, Inspection and Documentation
EN 12542 applies within its defined scope to relevant static cylindrical LPG vessels up to 13 m³. EN 13445 or another specified code is reviewed for other duties, with applicable pressure equipment requirements considered separately. Material, welding, non-destructive examination, pressure testing and coating records are defined for the vessel and agreed inspection plan.
Equipment Specification Overview
| Parameter | Specification |
|---|---|
| Medium | LPG; propane or butane to the specification |
| Installation | Underground with specified corrosion protection and site engineering |
| Industrial nominal capacity | 5–200 m³ across the stationary range; installation-specific model selection |
| Small storage models | 500 litres–10 m³; availability for the installation type confirmed per model |
| Design pressure | 17.16 bar |
| Test pressure | 24.54 bar |
| Design temperature | −20°C to +50°C |
| Vessel material | P355 steel to EN 10028-3 |
| Head options | Ellipsoidal or hemispherical |
| Design references | AD 2000 and EN 13445 where applicable to the vessel |
| Documentation | Certification, CE marking and ASME U stamping are provided only where specified and applicable to the selected equipment and manufacturer. |
| Connections and options | Project-specific nozzles, safety valves, instrumentation and pump or compressor interfaces |
Equipment configuration, capacity, pressure, materials and documentation are confirmed together for the selected model and project.
Storage Model Classes
The stationary portfolio includes industrial nominal capacities of 5–200 m³ and small storage models from 500 litres to 10 m³. The available capacity, installation type and design are confirmed for the proposed unit. Design pressure is 17.16 bar and test pressure is 24.54 bar in the stated storage range; test pressure is not an operating pressure.
Frequently Asked Questions
Are aboveground and underground tanks interchangeable?
No. Tank construction, coating, supports, accessible fittings and installation requirements are reviewed for the intended arrangement.
What capacities are available?
The model capacity is confirmed for the installation type. The general stationary family range should not be treated as the rating of every aboveground or underground model.
Can connections be adapted to the site?
Connections and instrumentation can be reviewed against the storage, filling and withdrawal requirements within the agreed scope.
What information is needed for a quotation?
Provide LPG composition, target capacity, pressure, location, installation conditions and the required documentation.
Related Equipment and Services
Related Guides
Technical guides from our blog on this equipment group.
- LPG Storage Tank Sizing for Filling StationsSize an LPG storage tank for a filling or autogas station by throughput, delivery frequency, autonomy and pressure. A practical method plus stock.
- Cryogenic Tank Installation: Siting, Foundation and Clearance RequirementsCryogenic tank installation requirements: foundation loads, separation distances, tanker access, ventilation and earthing. Plan the site before delivery.
- Tank Farm Layout: Planning a Site with Multiple Cryogenic TanksPlan a cryogenic tank farm layout: product grouping, oxygen separation, tanker access, manifolding, vaporizer placement and drainage. Get a site review.
- Autogas Station Equipment: What You NeedPlanning an LPG autogas station? See the full equipment list: storage tank, dispenser, pump, pipework, safety and metering, plus how to size it.
- What Certifications Should a Cryogenic Tank Have?Which cryogenic tank certifications matter: PED 2014/68/EU, ASME, EN 13458, EN 13530, AD 2000, ISO 9001, ISO 14001, ISO 3834-2, and the file to demand.