Foundries and steel plants don't have a single thermal hazard — they have four, often at the same time. A worker standing near a tapping ladle is dealing with radiant heat pouring off the molten bath, convective heat from rising hot air, contact heat every time they touch a rail, mold, or freshly cast part, and the ever-present risk of molten metal splash during pouring, tapping, or slag removal. Generic flame-resistant (FR) workwear rated only for flash fire — the kind common in oil & gas — is not built or tested for this combination. Selecting coveralls for this environment means understanding a different set of standards, fabric behaviors, and garment design rules than most FR procurement guides cover.