STORAGE TANKS & VESSELS - STORAGE OF LOW PRESSURE GASES PDF Print E-mail
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Monday, 24 May 2010 21:43
Article Index
STORAGE TANKS & VESSELS
Storage Tanks
Floating Roof Storage Tanks
Floating Roof Seals, Legs, Water Drain & Access Ladder
STORAGE OF HIGH PRESSURE GASES
1. SPHERICAL STORAGE (STORAGE SPHERES)
2. CYLINDRICAL STORAGE VESSELS
3. GAS CYLINDERS
STORAGE OF LOW PRESSURE GASES
All Pages

STORAGE OF LOW PRESSURE GASES

VARIABLE SIZE STORAGE

The traditional method of storing low-pressure gases is in a water-sealed Gas Holder (or Gasometer). Another LP storage vessel is the 'Piston Type' gas-holder.

These methods of gas storage are now almost obsolete due to modern methods of domestic gas distribution.

1. THE WATER-SEALED, TELESCOPING GASOMETER

This vessel is constructed in sections that 'Telescope' up and down as the quantity of contained gas changes. Water (or oil) seals are fitted between the telescoping sections with sufficient head pressure to prevent gas blowing out of the seals. The gas pressure is governed by the weight of the telescoping sections.

(See Figure 37)

2. THE PISTON TYPE GASOMETER

This gas holder contains a weighted piston with seals fitted between it and the vessel shell. Again, the quantity of gas governs the position of the piston. The pressure of the gas depends on the weight of the piston.

(See Figure 38)

The construction materials of storage vessels are selected by the Design Engineers and depend on the properties of the fluid to be stored. Mild steel, Stainless steel, Carbon steel, Aluminium, Special plastics and various other materials are used. Pressure and corrosive properties of the stored fluids are two of the main factors which govern the type and thickness of the construction materials. In many cases, vessels are coated internally with special substances to prevent corrosion. In other cases, a vessel may be externally ' lagged ' with an insulating material to minimise heat loss to, or heat absorption from, the surrounding atmosphere and other equipment.

TELESCOPING GASOMETER

Figure: 37

PISTON TYPE GASOMETER

Figure: 38



Last Updated on Monday, 24 May 2010 21:47