Tag: UN Tubes

Requalifying DOT UN & 3-Series Tubes

DOT UN or ISO tubes that are manufactured in accordance with 49 CFR 178.71(j) or ISO 11120 will have a retest cycle of 10-years provided they are carrying Division 2.1 (flammable) or 2.2 (non-flammable) gases (excepting CO2). The retest cycle is 5 years for Division 2.3 (toxic) g...
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DOT UN Tube Fill Pressure

DOT Regulations - Pressure DOT UN tubes manufactured per DOT regulation and ISO standard 11120 shall be filled in accordance with 49 CFR Section 173.302b(b), which states:  “UN pressure receptacles filling limits.  A UN pressure receptacle is authorized for the transportation...
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