Handling of liquid nirtogen container

HANDLING OF LN2 CONTAINER

  • The crogenic containers are double walled vessels with annular space evacuated and sealed.
  • In addition, several types of insulation viz. vacuum alone, expanded foam, gas filled powder and fibrous material, evacuated powder or evacuated super insulation are used as thermal insulators.
  • The outer walls of containers are made of stainless steel, carbon steel or aluminium alloys.

Do’s

  • Always fill the liquid nitrogen container slowly.
  • The storage room or place should be well ventilated/airated.
  • Always keep the lid in closed manner
  • Keep the canisters in appropriate place before closing the container
  • During transport support the container with soft padding (rubber, thermocole, wooden crates etc.)
  • Make regular checking of the liquid nitrogen level in the container by using a dip stick.
  • A minimum of 15 cm should be maintained to keep the straws in merged position.

Donts

  • The containers should be kept in a cold place. Exposure of the container to the direct sunlight or hot air should be avoided.
  • Use rubber or jute mate to place the liquid nitrogen container. Don’t place the container on a hard/concrete floor.
  • Avoid moistured floor where the container is stored.
  • Avoid improper handling, drilling, puncturing and rolling of the LN2 container
  • Don’t keep any material over the container
  • Don’t rack the container one over the other
  • Avoid abrupt contact of the container with the doors and other materials
  • The canisters are specific to the design of the container.
  • If the canister’s size is not appropriate it will not fit well or will not reach the bottom of the inner chamber. So don’t inter change the canister between the containers.
  • The vacuum knob should not be damaged
  • Don’t swing the LN2 containers
  • Avoid rough handling of canisters
  • Avoid frequent cooling and warming of containers.
  • Thermal stress may cause so much strain within it that the inner wall of container may crack.
  • Apperance of moisture on the outer wall of container is a sign of damaged container. Donot dry the container meant for regular use.
  • When the vacuum disappears, the insulating capacity is lost.
  • Repairing of damaged containers has to be done by the manufacturer only.

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Last modified: Wednesday, 6 June 2012, 2:58 PM