Renovation of a municipal facility in Durham, North Carolina. Completed plans call for the renovation of a municipal facility.

The County of Durham will receive proposals for qualified Contractor(s) to establish a contract to replace existing underground condenser piping with new above ground piping to chillers and cooling towers at the Durham County Detention Center The County reserves the right to accept or reject, in whole or in part, such proposals as appears in its judgment to be in the best interest of the County Last Question Date April 4, 2023 at 3:00 PM All inquiries concerning the Scope of Services, Proposal Submission Requirements or Procurement Procedures should be directed to: Procurement Specialist: Godfrey Herndon Purchasing Division Email: purchasinggroup@dconc.gov Telephone: 919-560-0741 The purpose and intent of the Request for Proposals (RFP) is to solicit proposals from qualified firms to provide the installation of new schedule 40 condenser piping at the County Detention center. The contractor shall provide the necessary, labor, permits and safety measures required to perform the following: o Lock out Tag out equipment being worked on and make safe for replacement of underground condenser piping. Terminate, including but not limited to, HVAC piping, electrical, controls and ancillary systems as required to perform task. Terminations will be consistent with current code and industry standards. A county representative will assist in locating systems required to accomplish this task. o Isolate condenser piping from chillers, cooling towers, pumps, chemical feed, and associated systems as needed to drain piping. o Disconnect condenser piping from chillers, cooling towers, pumps, chemical feed, and associated systems at nearest flange or fitting. Existing underground piping will be abandoned in place. Abandoned piping will be capped off, at points above ground with a fitting and/or fittings designed for this purpose. o Condenser piping will be re-routed through masonry walls of mechanical room and pump room. o New piping will be routed to exterior of facility, piping will be run adjacent to masonry wall separating the Detention Center Service yard and the Court House Sheriffs parking lot. o Where piping exits the mechanical room, access to the stair tower will be maintained. Piping, hangers and supports cannot block, or impede, access to this area. A walkway must be maintained between service yard wall, mechanical room, and service building o All holes through masonry walls, will be drilled using a wet core type drill, holes will be drilled large enough to accommodate insulation. o Pipe penetrations through fire walls will meet all current code requirements for fire caulking. o Supports will be attached to building wall or at grade concrete, attachments will be designed and mounted in such a way to support the load of (4) four 8" schedule 40 condenser lines filled with fluid. o Block wall separating the service yard from the Court House parking lot can be utilized. Building walls can also be utilized, supports shall be mounted in such a way that will not affect the stability of the walls. o It is the contractor's responsibility to verify all supports, attachments, welds and associated parts and pieces are designed in such a way that will sufficiently support the full load of pipe (fluid filled), fittings, insulation, and associated parts. The contractor will verify that all attachment points, at grade concrete, and walls will support piping. o All means of movement and positioning of material and associated systems are the responsibility of the contractor. The contractor will provide all equipment and tools needed to perform task o A crane maybe utilized if needed, a lift plan will be submitted to Risk Management for approval, all lifts will need to be coordinated with the facility and General Services. 72 hours' notice will be given before crane is brought on site. o Pipe used will be rolled" grooved, Victaulic type or welded, (cut grooves are not permissible unless performance data can be provided that a cut groove will not affect the integrity of pipe), pipe will be schedule 40 carbon steel and will meet current standards for intended use, pipe will be clearly labeled with pressure rating, standard and manufacture. o New piping installed, will be the same size as existing and hooked up to existing piping in a manner consistent with current code requirements and industry standards. o Reducers shall be eccentric for horizontal piping mounted flat side down, concentric reducers can be used for vertical applications. o Air vents will be installed at high points in system, vents will be minimum 3/4 inch, low point drains will be provided at all elevation changes or where water will be trapped, drains will have integral hose connection and will be minimum 3/4 inch brass body full port. o Vic-o-lets, similar to Style 923, strapless outlet, and style 925 Snap-let, are not to be used, unless there is a specific requirement for these types of fitting. o Couplings similar to Victaulic style 75 flexible, style 07 Zero-flex (used where applicable) are acceptable. Couplings similar to Vic Style 78 snap joint, and style 791 boltless, are not to be used, unless there is a specific requirement for these types of fitting. o Saddle style clamps, similar to Victaulic styles 920 or 921 mechanical tee, are acceptable for grooved or welded piping systems, all "wafers" will be retrieved and hung on the tee connection. o Weld-o-lets or thread-o- lets are acceptable for both welded and grooved systems, wafers will be retrieved and displayed in the same manner as bullet point above. o Where dis-similar piping is to be joined, dielectric fittings will be used o Branch connections can be schedule 40 BLK nipples, or dielectric nipples o Dielectric unions are permissible as long as they are accessible for service. o All branch connections will be at minimum the same size as system being fed. o All branch connections will have isolation valves at the point of tie in. o Full port, brass body ball valves, and butterfly valves, flanged or Victaulic style are acceptable, gate and globe are not to be used unless there is a specific requirement for these types of valve. o All valves will be oriented with the handle on top or to the side, valves oriented with the handle facing down will not be acceptable. o Valves will meet current standards codes and or requirements for the system being served and intended use. o Replaced cooling tower valves currently installed with new. Valves will meet current standards codes and or requirements for the system being served and intended use. o Flanges will be full face type: flat face class 125 or raised face type class 250, or Victaulic style flanges are acceptable. o Flange gasket material will be suitable for the application and asbestos free o Flange bolts and nuts will meet current code and system requirements. o All fittings will meet current standards for intended use. o Submittals will be provided for review and approval for all pipe, fittings, hangers, supports, all thread rod and associated parts to be used. o Re- connect condenser piping to chillers, cooling towers, pumps, chemical feed, and associated systems as required to provide a fully functional system. o Heat trace cable will be applied to all exterior piping, heat trace system will be thermostatically controlled. Heat trace cable will be commercial/ industrial grade. The County will provide electrical connections as needed to power system. Heat trace will be installed according to manufactures recommendations. o All exterior piping will be insulated with a minimum 2" fiberglass, or comparable product. Insulation will extend into facility a minimum of 2 inches. Insulation will be installed according to manufactures recommendations. o Metal jacket will be installed on all exterior insulation, jacket will extend 2 inches minimum into core drilled holes and be sealed/caulked to prevent water/weather entering the facility o Jacket will be installed according to manufacture recommendations to prevent water intrusion o Piping will be tested to two times operating pressure, or a minimum of 80 pounds psi. Test will be for 24hrs, test will be witnessed by a County representative before pressure is released. All leaks detected will be repaired and piping tested for another 24hrs, testing will proceed until pipe holds pressure for the 24-hour time frame. o If testing with air cannot verify that system is leak free, system will be filled with water and pressurized to two times operating pressure, or a minimum of 80 psi. If no leaks are found system will be accepted as watertight. o Once testing has passed refill systems as required, bring systems back online and test through all modes of operation. A county representative will assist in bringing systems back online and monitor through BAS. o System will be turnkey and fully functional, and ready for immediate use. o Clean up work area daily and at the end of project, disposal of all material, debris and associated parts and pieces are the responsibility of the contractor to perform.