Greenville Utilities Commission (GUC) is soliciting sealed bids for the replacement of an existing natural gas odorizer system located at their Liquified Natural Gas (LNG) Peak Shaving Facility at 4150 Natural Gas Way, Greenville, NC 27834. The facility provides natural gas peak shaving capabilities to GUC's natural gas customers with vaporization capabilities up to 1,000 DTs per hour, though the plant typically operates in stand-by mode with LNG boil-off flow rates ranging from 0 to 3 DTS per hour. The maximum allowable operating pressure (MAOP) of the pipeline at the odorizer is 60 PSIG, with minimum operating pressure of 30 PSIG.
The proposed odorizer system must include an injection system (either pump-driven or differential pressure-driven) capable of injecting up to 0.5 lbs of odorant per MMSCF at a maximum flow of 1 MMSCFH. The system must be capable of injection into pressures ranging from 30 psi to 250 psi and must feature a closed-loop design to purge and prime back to the storage tank without odorant exposure to the atmosphere. All components must be constructed of 316 stainless steel with seamless tubing (304 or 316 stainless steel, 0.035" wall thickness) and Swagelok brand compression or VCO fittings exclusively. The existing 250-gallon nitrogen blanketed odorant tank will remain in service.
Key technical requirements include a pneumatically actuated pump system with 0.325 cc/stroke displacement, positive volume chamber-type odorant meter with 0.001 pound pulse output resolution, and a Class 1 Division 1 rated controller with 120 VAC power and 30-day battery backup. The controller must feature an LCD display with real-time monitoring of injection timing, pump efficiency, meter level, battery voltage, flow signal input, tank level, odorant temperature, and cumulative odorant injected. The system must communicate with GUC's LNG SCADA system using ControlWave Micro BSAP protocol and include a 120-day audit trail capability. The cabinet must be constructed of all-welded aluminum to NEMA 4X standards with fire-retardant insulation and Sherwin-Williams abrasion-resistant acrylic enamel finish. All components must be factory-mounted and pressure-tested for a minimum of 24 hours with records maintained by the manufacturer for at least 5 years.
Bidders must clearly state any exceptions or variations to the specifications on the provided Exception/Variation Form. All deliveries must be FOB GUC Warehouse at 701 Utility Way, Greenville, NC 27834, between 8:00 AM and 4:30 PM Monday-Friday only. Questions regarding this bid must be submitted via email to Cleve Haddock, Procurement Manager, at haddocgc@guc.com by 5:00 PM EST on February 12, 2026. Two copies of the completed proposal must be received in sealed envelopes no later than 2:00 PM EST on February 26, 2026.