When does a load of Class 3 flammable liquid require placards, and which placard?

To answer the question of when a load of Class 3 flammable liquid requires placards and which placard is required, we look to the relevant CFR sections provided.

According to [49 CFR 172.504 — 172.504 General placarding requirements], "(a) General. Except as otherwise provided in this subchapter, each bulk packaging, freight container, unit load device, transport vehicle or rail car containing any quantity of a hazardous material must be placarded on each side and each end with the type of placards specified in tables 1 and 2 of this section..." This indicates that any quantity of a hazardous material, including Class 3 flammable liquids, requires placarding.

For Class 3 flammable liquids, the specific placard requirements are not detailed in the provided sections, but [49 CFR 172.504] implies that the placard specified for the material in question must be used. Typically, for Class 3 flammable liquids, a FLAMMABLE LIQUID placard is required, but this is not explicitly stated in the provided sections.

However, [49 CFR 172.544 — 172.544 COMBUSTIBLE placard] discusses the COMBUSTIBLE placard, which might be relevant for certain combustible liquids but is not the correct placard for Class 3 flammable liquids.

Given the information provided and focusing on the requirement for placarding Class 3 flammable liquids, [49 CFR 172.504] is the most relevant section, indicating that placarding is required for any quantity of hazardous materials, including Class 3 flammable liquids, but it does not specify the exact placard for Class 3 materials.

This is compliance information, not legal advice — verify against the official eCFR and the issuing agency.