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tank flange
(a) Specification DOT 406, DOT 407 and DOT 412 cargo tank motor
vehicles must conform to the requirements of this section in addition
to the requirements of the applicable specification contained
in Sec. Sec. 178.346, 178.347 or 178.348.
(b) All specification requirements are minimum requirements.
(c) Definitions. See Sec. 178.320(a) for the definition of certain
terms used in Sec. Sec. 178.345, 178.346, 178.347, and 178.348.
In addition, the following definitions apply to Sec. Sec. 178.345,
178.346, 178.347, and 178.348:
Appurtenance means any cargo tank accessory attachment that has
no lading retention or containment function and provides no structural
support to the cargo tank.
Baffle means a non-liquid-tight transverse partition device that
deflects, checks or regulates fluid motion in a tank.
Bulkhead means a liquid-tight transverse closure at the ends of
or between cargo tanks.
Charging line means a hose, tube, pipe, or similar device used
to pressurize a tank with material other than the lading.
Companion flange means one of two mating flanges where the flange
faces are in contact or separated only by a thin leak sealing
gasket and are secured to one another by bolts or clamps.
Connecting structure means the structure joining two cargo tanks.
Constructed and certified in conformance with the ASME Code means
the cargo tank is constructed and stamped in accordance with the
ASME Code, and is inspected and certified by an Authorized Inspector.
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tank
flange
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