Products / Low-pressure gas storage solutions

MOTET · Low-pressure gas storage solutions

Membrane gas holders for biogas, fuel gas and oxygen

MOTET supplies membrane gas holders for biogas, industrial fuel gas and low-pressure oxygen storage. We select the membrane, holder structure and supporting equipment to suit the gas composition, storage capacity, delivery pressure and site conditions.

Discuss your storage requirements

Planning your gas holder

  1. Define the gas duty

    Gas composition, contaminants, moisture and temperature.

  2. Size the working storage

    Production and consumption profiles, usable volume and pressure range.

  3. Choose the installation

    Foundation or tank-rim conditions, footprint and maintenance access.

  4. Agree the equipment scope

    Ancillaries, control interfaces, installation and commissioning responsibilities.

Read the biogas selection guide

Applications and project examples

Membranes and supporting equipment are selected for the gas being stored. The examples below cover biogas, industrial fuel gas and oxygen projects.

Biogas storage

Buffer the difference between biogas production and consumption at digestion, wastewater-treatment and organic-waste facilities. A double membrane gas holder provides variable-volume, low-pressure storage upstream of the agreed gas-use system.

  • Provide methane, carbon dioxide, hydrogen sulphide and moisture data.
  • Use production and consumption profiles to define usable storage.
  • Coordinate condensate management, downstream gas pressure and the flare interface.
Site overview of tank-top double membrane gas holders storing biogas in Anhui, China.
Membrane lifting during repair and reinstallation of the existing biogas holder membrane in Anhui.
Membrane lifting during repair and reinstallation of the existing biogas holder membrane in Anhui.
Clamping plates and sealed connections at a local membrane repair on the Anhui biogas holder.
Clamping plates and sealed connections at a local membrane repair on the Anhui biogas holder.
Project referenceAnhui, China · Tank-top double membrane biogas holder

Site overview and repair details from a biogas storage project in Anhui. The work involved local repair and reinstallation of the existing membrane, including crown-plate and clamping connections and membrane lifting. The full record contains 29 photographs.

View the Anhui biogas holder repair · 29 site photos

Industrial fuel-gas storage

Storage and buffering for industrial coal-gas duties are assessed by the actual process gas. Coke oven gas, blast furnace gas and basic oxygen furnace gas have different compositions and conditioning requirements; specify the gas stream by name.

  • Supply a representative gas analysis, including contaminants and condensable components.
  • State inlet temperature, pressure limits and upstream gas treatment.
  • Agree membrane compatibility, containment, instrumentation and site protection requirements.
White 1,000 m³ membrane fuel-gas holder with connecting pipework in the foreground.
Project referenceFuel-gas holder · 1,000 m³

A 1,000 m³ fuel-gas holder. The gallery also includes membrane layout, lifting and connection work from other fuel-gas projects.

Fuel-gas storage · Installation and site records17 photographs · 1 video clip

Membrane layout, lifting, connections and gas holder exterior views. The video is silent. Select play to watch.

Exterior of a membrane gas holder at a fuel-gas storage project.
Exterior of a membrane gas holder at a fuel-gas storage project.
Membrane laid out on site for a fuel-gas storage project.
Membrane laid out on site for a fuel-gas storage project.
Work on the membrane perimeter fixings and connections.
Work on the membrane perimeter fixings and connections.
Membrane laid out on site for a fuel-gas storage project.
Membrane laid out on site for a fuel-gas storage project.
Membrane lifting and coordinated site work at a fuel-gas storage project.
Membrane lifting and coordinated site work at a fuel-gas storage project.
Site work on the foundation and lower connection area.
Site work on the foundation and lower connection area.
Site inspection of a flange and access opening.
Site inspection of a flange and access opening.
Site work on the foundation and lower connection area.
Site work on the foundation and lower connection area.
Site record of membrane unfolding and shape formation.
Site record of membrane unfolding and shape formation.
Membrane lifting and coordinated site work at a fuel-gas storage project.
Membrane lifting and coordinated site work at a fuel-gas storage project.
Detail of the membrane surface and lower connection area.
Detail of the membrane surface and lower connection area.
Site work on the foundation and lower connection area.
Site work on the foundation and lower connection area.
Exterior view of the membrane gas holder and adjacent piping.
Exterior view of the membrane gas holder and adjacent piping.
Exterior view of the membrane gas holder and adjacent piping.
Exterior view of the membrane gas holder and adjacent piping.
Front view of a 1,000 m³ membrane fuel-gas holder.
Front view of a 1,000 m³ membrane fuel-gas holder.
Site record of membrane unfolding and shape formation.
Site record of membrane unfolding and shape formation.
Detail of the membrane surface and lower connection area.
Detail of the membrane surface and lower connection area.
Fuel-gas project · Membrane installation

Site footage of the laid-out membrane, lifting equipment and surrounding work area.

Low-pressure oxygen storage

MOTET has project experience with low-pressure flexible-membrane oxygen holders. Each proposal is assessed for its oxygen concentration and operating conditions, with an oxygen-service review of gas-contact materials, components and cleanliness.

  • Specify oxygen purity, moisture, temperature and the full pressure range.
  • Review oxygen compatibility and cleanliness of membranes, seals, valves and gas-contact components.
  • Define inspection, cleaning, handling and acceptance documentation for the agreed system.
Exterior view of the cylindrical vessel and surrounding site at an oxygen storage project.
Project referenceLow-pressure membrane oxygen holder

Workshop and site records from an oxygen storage project, covering membrane preparation, the vessel exterior and interior construction. Expand the gallery for two photographs and four video clips.

Oxygen storage · Workshop and site footage2 photographs · 4 video clips

The photographs show workshop preparation. The videos cover workshop activity, the vessel exterior and interior construction. The clips are silent. Select play to watch.

Membrane preparation for an oxygen storage project: cutting equipment in the workshop.
Membrane preparation for an oxygen storage project: cutting equipment in the workshop.
Membrane preparation for an oxygen storage project: material laid out in the workshop.
Membrane preparation for an oxygen storage project: material laid out in the workshop.
Membrane preparation · Workshop footage

A view of the membrane material and processing equipment in the workshop.

Oxygen storage project · Exterior view

Site footage of the cylindrical vessel and the surrounding area during an outdoor event.

Inside the vessel shell · View one

Construction footage showing the shell wall and equipment inside the vessel.

Inside the vessel shell · View two

A second site view showing the shell wall, coiled sheet and construction equipment.

Further reading

The following EIGA publications cover materials, fire hazards and equipment cleanliness in oxygen service.

Bring these inputs to the first technical discussion

Gas composition
Gas analysis, purity, moisture, contaminants and expected variations.
Usable storage
Production and consumption profiles, operating reserve and the stated volume basis.
Pressure and temperature
Normal operation, allowable limits and downstream requirements.
Site and installation
Plot plan, foundations or tank-top structure, access, drainage and local loads.
Materials and controls
Gas-contact materials, level measurement, pressure regulation and protective interfaces.
Delivery boundaries
Equipment, civil works, piping, installation, commissioning and documentation responsibilities.

Equipment supply and technical support

The proposal should make each party’s responsibilities clear before price comparison. MOTET’s supply and technical support are agreed against the project requirements.

  • Membrane manufacture and connections suited to the approved duty.
  • Support-air equipment where required by the selected configuration.
  • Specified instruments, controls and piping interfaces.
  • Installation and commissioning support within the agreed contract scope.

Engineering insights

How to Size a Double Membrane Gas Holder for Biogas

Read the biogas selection guide

Equipment and technical information

Tell us what gas you need to store

Send us the gas analysis, required storage capacity, operating pressure and site layout so our engineers can prepare a proposal and quotation.

Discuss your storage requirements