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Amendment #1 To 2023-UWMSN-00225-RFP
Amendment #1 is issued to:
· Answer questions received from potential bidders – see below
· Add an OPTIONAL site visit on May 18th at 9:00AM – see below as well as reviewing the PREREQUISITES tab of the sourcing event in ShopUW+ for details
· Extend the due date for questions to May 23, 2023
· Extend the bid due/closing date to June 1, 2023 at 2:00PM
Questions and Answers:
| Q1. | Please confirm the scope of controls and any associated specifications. Is there existing analog/digital IO on the HTST system that will be used to control these new components, or should the Hot Water Skid include Ethernet-based remote I/O? Should the system include VFDs for the pumps or will these be supplied by Others and installed elsewhere? |
| A1. | Two VFD’s should be provided and installed in a wash down panel. The P&ID and section 3.4c indicate that a motor speed control (VFD) is required for each recirculation pump motor. The specifics of the initial sections of your question can be addressed at the mandatory on-site tour. |
| Q2. | Is there some means of accommodating thermal expansion on the existing HTST skid? If not, this may be required on the hot water lines, which may be further complicated should sanitary components be required. We assume the Sterling units have some type of atmospheric break in their system to accommodate thermal expansion. |
| A2. | The Sterling’s do not have an atmospheric break, but instead each has a pressure relief valve that leads towards a drain. Per the P&ID, both new loops are enclosed, and each loop shows a required pressure relief valve to allow water to leave when the internal pressure exceeds the valves set point. The pressure relief valves’ outlets should be directed into a nearby hub drain using a single line. |
What’s missing in the P&ID are vacuum breakers, one per loop needs to be located at a high point of each respective loop. They allow the pressure to recover during shutdown. Regarding the last point, see section 3.4e, which is intended to be ‘a catch all’ for the expert vendors to address how they would do things differently, if necessary.
| Q3. | Please confirm if the requirement to use sanitary tubing for soft water lines also means the components on these lines (pumps, flow meters, HEX) also must be sanitary. We assume the Sterling Units were not sanitary. |
| A3. | The hot water system is a utility thus not requiring sanitary construction meant for product. But it is located in a licensed processing area and so must comply with (product) non-contact surfaces requirements. The RFP (section 3.3b) states that the entire recirculation loop should be made of 316 stainless steel components. If there are components not readily available in 316, that should be called out in the response. (See section 3.4a. regarding deviations) Also, the soft water supply (in the room up to the connection point) is sanitary stainless tubing which is why sanitary stainless tubing is required. |
| Q4. | Please confirm if UW can allow for progressive/milestone payment terms for this system. Section 2.3 seems to indicate that the full balance will be paid upon completion. |
| A4. | Milestone payments may be negotiated with the awarded vendor. |
| Q5. | If the request to visit the site is not possible, please confirm where this system will sit in relation to the existing system and provide details on the location of the steam & condensate mains. |
| A5. | The request to visit the site will be accommodated and actually be mandatory for all of the interested vendors. Mandatory because it’s critical that all potential vendors have completely equal access to ensure fairness. |
| Q6. | The as-built P&ID does not appear to be attached as noted in the Specification. If this is available, please provide along with any fabrication drawings of the existing system. |
| A6. | That was an oversight, and it has or will be provided for all. Also, the heat duties pdf will be provided. |
| Q7. | The RFQ notes that the soft water piping shall be 316L SS sanitary tubing. Please confirm what MOC/line specifications are required for the steam and condensate piping. |
| A7. | The steam and condensate are plumbed using black iron. |
| Q8. | Please confirm if there are any preferred manufacturers for the components to be used on this system. |
| A8. | Preferred vendors are Fristam for the recirculation pumps, Enerquip stainless multi-tubes, E & H meters and IFM instruments. |
| Q9. | Please confirm if it is possible to schedule a visit to look at the existing system and review requirements for ¦eld work. If the Vendors can visit, who should we contact to coordinate? |
| A9. | The request to visit the site will be accommodated and actually be mandatory for all of the interested vendors. Mandatory because it’s critical that all potential vendors have completely equal access to ensure fairness. |
| Q10. | What are the power requirements for the pumps? |
| A10. | 480V, three phase is the power provided for the pump motors and thus what feeds the required VFD’s. |
| Q11. | If we have a question on the overall design in the P&ID, who do we talk to? |
| A11. | You can submit your questions during the second question period or bring your question to the optional site visit. |
| Q12. | Is there a size limitation to these skids? |
| A12. | The smallest doorway in route to the raw (HTST) room is 83” tall and five feet wide. Currently, together both Sterling’s utilize a 4’ x 4’ footprint. We are hopeful the new skid will have a similar minimal footprint. Thus, to readily move the skid into the raw room, it could be moved upright assuming it’s less than 83” while on the moving device or laid on its side to go through that smallest doorway. |
| Q13. | What is the path that these enter the building? Door size? |
| A13. | The route into the CDR raw room, where the HTST is located, starts at dock 3 which has a fixed four-foot-high dock height and a very large overhead door. If the skid height exceeds 83 inches, it should be turned horizontally to be moved through the plant and into the raw room and then stood up at in its final location. The route has singing doorways that provide a five-foot-wide access with an inch or two to spare. |
| Q14. | Are there specific brands on components that would prefer to be used? |
| A14. | Preferred vendors are Fristam for the recirculation pumps, Enerquip stainless multi-tubes, E & H meters and IFM instruments. |
| Q15. | Does the condensate receiver need to be SS and wash down and require a vent? |
| A15. | It just needs to be washdown, stainless is preferred, when it pumps there’s no backpressure on the shell and tubes as there will be low pressure on the steam coming into the tubular heat exchangers. |
| Q16. | Does the piping need to be insulated? |
| A16. | Yes, just the steam and condensate piping. |
OPTIONAL SITE VISIT DETAILS – also see the PREREQUISITES tab of the sourcing event
| DATE: | MAY 18, 2023 |
| TIME: | 9:00 A.M. |
| LOCATION: | CENTER FOR DAIRY RESEARCH (CDR) – 1605 LINDEN DRIVE – ENTRANCE ON WEST SIDE OF BABCOCK HALL | |
| PARKING: | LOT 36 USING VISITOR SPOTS | |