CO0053618 - Laserfiche WebLink

Home Browse Search

3. Engineering Review of Tanks & Equipment Covered by CalARP Program C:\TRICH\Jobs\4515582 Leprino Tracy\Report\Leprino Tracy CalARP 040221.docx 3-4 The high pressure receiver tank (HPR-1) is supported on a frame suspended from the roof framing. Recommendations noted in a previous report appear to have been addressed. Longitudinal and transverse restraint is provided by steel angle bracing to the roof framing above at each side of the tank (Figures 3-11 & 3-12). Piping in the QLC Engine Room appears inadequately braced (Figure 3-17). Only vertical support hangers were observed. In addition, some vertical hangers appear to be attached to roof framing using compression clamps without restraining straps, which would prevent them from falling off the beam if they become loose. Without lateral bracing, the piping may sway excessively resulting in damage to the piping or connections to the equipment. Roof above the QLC Engine Room The roof mounted evaporative condenser (EC-1) over the QLC Engine Room is welded to a steel support frame (Figure 3-15). Calculations indicate that the condenser would be designed for 69% of gravity if anchorage were designed to the current code based on factors associated with wet-side HVAC units at the roof. Results of the analysis of the condenser indicate a maximum DCR ratio of 0.16. The steel support frame attachment to the roof framing below was not visible; however, the frame appears robust and well braced in both directions. The frame is deemed adequate by inspection. This condenser has an ammonia leak detector mounted to an adjacent wall. Pipe supports on the roof appear inadequate. Steel frame support columns are attached to wood blocks and sleepers (Figure 3-18). It is unknown whether these are in turn attached to roof framing members below. If not, lateral forces may result in the frames displacing laterally, which may result in damage to the piping. 3.2.2 Main Engine Room The primary equipment in this room includes four high-stage compressors (HSC-1 to HSC-4) (Figures 3-19 & 3-20), three low-stage compressors (LSC-1 to LSC-3) (Figures 3-21 & 3-22) and three additional high-stage compressors (HSC-7 to HSC-9) (Figures 3-23 & 3-24). Associated equipment includes a suction trap tank (SA-1) (Figures 3-25 & 3-26). A leak detector is located adjacent to this tank.