2906.5 Kettle controls.
FC § 2906.5
The kettle and thin-down tank shall be instrumented, controlled and interlocked so that any failure of the controls will not result in an unsafe condition. The kettle shall be provided with a pressure-rupture disc in addition to the primary vent. The vent piping from the rupture disc shall be of minimum length and shall discharge to an approved location. The thin-down tank shall be adequately vented. Thinning operations shall be provided with a vapor removal system capable of ensuring a safe atmosphere.
