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  2. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    IIAR Bulletin 114 pipe marker for a low-temperature recirculated suction (LTRS) line, where both liquid and vapor are present [6] In 2014, the International Institute of Ammonia Refrigeration introduced a specialized label design for use when marking pipes associated with refrigeration systems using ammonia , including information such as the ...

  3. CPK coloring - Wikipedia

    en.wikipedia.org/wiki/CPK_coloring

    Several of the CPK colors refer mnemonically to colors of the pure elements or notable compound. For example, hydrogen is a colorless gas, carbon as charcoal, graphite or coke is black, sulfur powder is yellow, chlorine is a greenish gas, bromine is a dark red liquid, iodine in ether is violet, amorphous phosphorus is red, rust is dark orange-red, etc.

  4. Utility location - Wikipedia

    en.wikipedia.org/wiki/Utility_location

    Yellow spray paint indicating below-street gas utility line (New York City, 2007) Telecommunication cable location marking Colored flags for utility locating Permanent water pipeline markers in Switzerland. Utility color codes are used to identify existing underground utilities in construction areas, to protect them from damage during ...

  5. Liquid nitrogen - Wikipedia

    en.wikipedia.org/wiki/Liquid_nitrogen

    Liquid nitrogen is a compact and readily transported source of dry nitrogen gas, as it does not require pressurization. Further, its ability to maintain temperatures far below the freezing point of water, specific heat of 1040 J ⋅kg −1 ⋅K −1 and heat of vaporization of 200 kJ⋅kg −1 makes it extremely useful in a wide range of ...

  6. NFPA 704 - Wikipedia

    en.wikipedia.org/wiki/NFPA_704

    These hazard codes are not part of the NFPA 704 standard, but are occasionally used in an unofficial manner. The use of non-standard codes may be permitted, required or disallowed by the authority having jurisdiction (e.g., fire department). [3] — No special notice (the correct format is to leave the white square blank, but sometimes a dash ...

  7. Gas cylinder - Wikipedia

    en.wikipedia.org/wiki/Gas_cylinder

    6.2.1 Medical gas cylinder color code Indian ... a hydrogen cylinder valve outlet does not fit an oxygen regulator and supply line, which could result in catastrophe ...

  8. GHS hazard pictograms - Wikipedia

    en.wikipedia.org/wiki/GHS_hazard_pictograms

    Note: The asterisks are replaced by the class number and compatibility code Divisions 1.1–1.3 Explosives – Substances and articles which are classified as explosives but which present no significant hazard Note: The asterisk is replaced by the compatibility code Division 1.4

  9. Bottled gas - Wikipedia

    en.wikipedia.org/wiki/Bottled_gas

    Virtual Anesthesia Machine - 6 different color codes for medical gas cylinders, hoses and outlets; British Compressed Gases Association – Colour Coding of Cylinders. Air Products – European Gas Cylinder Identification Chart. Compressed Gas Association (U.S.) Gases and Welding Distributors Association (U.S.) European Industrial Gases ...