Text For Citation: 01 Item/Group: 002 Hazard:

29 CFR 1910.119(d)(3)(i)(D): The employers relief system design and design calculation for 15G-SV006, High Pressure Receiver Relief Valve and the flare were not adequately performed: a) Superior Refining Company; On or about April 26, 2018, the 15G-SV006 relief valve sizing document provided indicated the calculations were performed for pressure relief of the High Pressure Receiver (15G-V07), Primary Absorber (15G-V08), Sponge Absorber (15G-V09) and Water Knockout Drum (15G-V13). The calculations failed to include piping and vessels from the discharge of the gas compressors to the Stripper Column (including the High Pressure (HP) Receiver Condensers, HP Receiver, HP Receiver Water Knockout Drum, Primary Absorber, Sponge Absorber, and Stripper Column). b) Superior Refining Company; On or about April 26, 2018, the 15G-SV006 relief valve sizing document backpressure calculation included the discharge piping and elbows to the flare header (measuring less than 30 feet total length); however, the calculation failed to include the full length to the flare (flare header continues for over 100 feet to the flare), as well as, the possible flows and pressures from other relief devices in the common flare header.