Appendix E: Safety Data Sheet for Liquid Nitrogen
D52IB001EN-G
81
LIQUID NITROGEN - N
2
MSDS
EFFECTIVE DATE: JUNE 9, 2010
PAGE 4 OF 7
7. HANDLING and USE
WORK PRACTICES AND HYGIENE PRACTICES
: Be aware of any signs of dizziness or fatigue; exposures to
fatal concentrations of Liquid Nitrogen could occur without any significant warning symptoms, due to oxygen
deficiency.
STORAGE AND HANDLING PRACTICES
: Cryogenic containers should be stored in dry, well-ventilated areas
away from sources of heat, ignition and direct sunlight. Store containers away from heavily trafficked areas and
emergency exits. Store away from process and production areas, away from elevators, building and room exits or
main aisles leading to exits. Protect containers against physical damage.
Containers should be stored upright and be firmly secured to prevent falling or being knocked-over. Containers can
be stored in the open, but in such cases, should be protected against extremes of weather and from the dampness
of the ground to prevent rusting. Cryogenic containers are equipped with pressure relief devices to control internal
pressure. Under normal conditions, these containers will periodically vent small amounts of product. Some metals
such as carbon steel may become brittle at low temperatures and will easily fracture. Prevent entrapment of liquid in
closed systems or piping without pressure relief devices. Use a check valve or other protective device in the
discharge line to prevent hazardous backflow. Never tamper with pressure relief valves and containers.
Keep the smallest amount on-site as necessary. Full and empty containers should be segregated. Use a first-in,
first-out inventory system to prevent full containers from being stored for long periods of time.
SPECIAL PRECAUTIONS FOR HANDLING CRYOGENIC CONTAINERS
: Cryogenic liquids can present
significant safety hazards. Never allow any unprotected part of the body to touch uninsulated pipes or vessels which
contain cryogenic fluids. The extremely cold metal of the container will cause the flesh to stick fast and tear when
one attempts to withdraw from it. The following rules are applicable to work situations in which cryogenic containers
are being used.
Before Use:
Move containers a suitable hand-truck. Do not drag, slide or roll containers. Do not drop containers or
permit them to strike each other. Secure containers firmly.
During Use:
Use designated CGA fittings and other support equipment. Do not use adapters. Do not use oils or
grease on valve fittings or equipment. Leak-check system with leak detection solution. Immediately contact the
supplier if there are any difficulties associated with operating container valve.
After Use:
Close main container valve. Mark empty container “EMPTY”.
NOTE:
Use only DOT or ASME code containers designed for cryogenic gas storage. Close valve after each use
and when empty. Containers must not be recharged except by or with the consent of owner. For additional
information, refer to Section 16, Other Information, for additional available literature.
OTHER SPECIAL PRECAUTIONS:
Use piping and equipment adequately designed to withstand pressures and
temperatures to be encountered. Use a check valve or other protective apparatus in any line or piping from the
container to prevent reverse flow. To prevent cryogenic liquids or cold gas from being trapped in piping between
valves, the piping shall be equipped with pressure relief devices. Only transfer lines designed for cryogenic liquids
shall be used. It is recommended that all vents be piped to the exterior of the building.
STANDARD VALVE CONNECTIONS FOR U.S. AND CANADA:
Use the proper CGA connections
,
DO NOT
USE ADAPTERS:
THREADED
:
CGA
295
PIN-INDEXED
YOKE:
Not applicable.
ULTRA HIGH INTEGRITY:
Not applicable.
PROTECTIVE PRACTICES DURING MAINTENANCE OF CONTAMINATED EQUIPMENT
: Follow practices
indicated in Section 6 (Accidental Release Measures). Make certain application equipment is locked and tagged-out
safely. Always use product in areas where adequate ventilation is provided.
8. EXPOSURE CONTROLS - PERSONAL PROTECTION
VENTILATION AND ENGINEERING CONTROLS
: Use with adequate ventilation. Local exhaust ventilation is
preferred, because it prevents gas dispersion into the work place by eliminating it at its source. If appropriate, install
automatic monitoring equipment to detect the level of oxygen.
RESPIRATORY PROTECTION
: Maintain oxygen levels above 19.5% in the workplace. Use supplied air
respiratory protection if oxygen levels are below 19.5% or during emergency response to a release of Liquid
Nitrogen. If respiratory protection is required, follow the requirements of the Federal OSHA Respiratory Protection
Standard (29 CFR 1910.134), or equivalent State standards.
HAND PROTECTION
: Wear loose-fitting, thermally insulated or leather gloves. Otherwise, wear glove protection
appropriate to the specific operation for which Liquid Nitrogen is used. If necessary, refer to U.S. OSHA 29 CFR
1910.138 and appropriate Standards of Canada.
Summary of Contents for TTK 600
Page 2: ......
Page 74: ...Appendix B Sample Chamber Dimensions 74 D52IB001EN G Appendix B Sample Chamber Dimensions ...
Page 75: ...Appendix C Declaration of Conformity D52IB001EN G 75 Appendix C Declaration of Conformity ...
Page 77: ...Appendix D Spare Parts and Accessories D52IB001EN G 77 176383 COOLING MODE SWITCHING VALVE ...
