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Above-ground tanks and pressure vessels used to store liquid or gaseous hazardous materials at ambient temperatures and pressures in excess of 0.5 psig shall be in accordance with the following:
  1. Tanks and pressure vessels installed above ground shall be provided with substantial masonry or noncombustible structural supports so installed as to prevent accidental movement.
  2. Horizontal, above-ground tanks and pressure vessels shall be mounted on saddles in such a manner as to permit expansion and contraction, not only of the container but also of the connected piping. Only two such saddles shall be used and every container shall be supported to prevent the concentration of excessive loads on the supporting portion of the shell.

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