Each device should be permanently marked, or have a permanently
fixed tag made of stainless steel or other corrosion-resistant material,
to indicate:
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.1 manufacturer's name or trade mark;
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.2 style, type, model or other manufacturer's
designation for the device;
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.3 size of the outlet for which the device is
approved;
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.4 approved location for installation, including
maximum or minimum length of pipe, if any, between the device and the atmosphere
and the apparatus group assigned to the tested device;
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.5 direction of flow through the device;
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.6 indication of the test laboratory and report
number; and
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.7 compliance with the requirements of MSC/Circ.373/Rev.2.