48 -- TURBINE BYPASS VALVE, PINE FLAT DAM, CALIFORNIA

Notice Date

March 21, 2001

Contracting Office

USAED, Sacramento, Corps of Engineers, Contracting Division, 1325 J Street, Sacramento, CA 95814-2922

ZIP Code

95814-2922

Solicitation Number

DACW05-01-R-0016

Response Due

May 16, 2001

Point of Contact

Beverly Hatfield, 916-557-5232

Description

PLEASE NOTE: IN ORDER TO INSURE THAT YOU RECEIVE ANY ADDITIONAL AMENDMENTS THAT MAY BE PLACED AGAINST THIS SOLICITATION IT IS IMPORTANT THAT YOU PROVIDE US WITH A VALID E-MAIL ADDRESS WHEN FILLING OUT INFORMATION TO PLACE YOUR FIRM ON THE PLAN HOLDERS LIST. FAILURE TO DO SO MAY RESULT IN YOUR FIRM NOT RECIVEING A COPY OF ANY ADDITIONAL AMENDMENTS AS WE ARE ONLY SENDING THEM OUT ELECTRONICALLY. PROJECT TITLE AND LOCATION: Turbine Bypass Valve, Pine Flat Dam, California. This proposed contract is UNRESTRICTED. JOB DESCRIPTION: Requirement is described as follows: Manufacturer shall provide two energy dissipating, inline or free discharge, regulating valves, of either the sleeve type multijet or plate type multijet design. Each valve shall be delivered to Pine Flat Dam, Piedra, California (located approx 30 miles each of Fresno, California). The manufacturer shall be responsible for design, fabrication, shop testing, transportation, and performance testing. Installation will be by others. One valve will be connected to a 66-inch pipeline and the other to a 48-inch pipeline by means of a flanged connection. PERFORMANCE REQUIREMENTS: Flow requirements shall be as follows: The valves shall be capable of producing a combined flow of at least 750 CFS of water (temperature range of 32 to 80 deg F) when subjected to a static head of 128.55 feet, with adjustment for head loss for the 48-inch pipeline valve and static head of 118.25 feet, with adjustment for head loss, for the 66-inch pipeline valve. Each valve shall also be capable of releasing a minimum flow of 50 CFS or less at these head conditions without cavitation damage to the valves and any associated piping/discharge shroud. Finally, the valves shall be capable of producing a combined flow of at least 900 CFS when subjected to a static head of 365.05 feet, with adjustment for head loss, for the 48-inch pipeline valve and static head of 354.75 feet, with adjustment for head loss, for the 66-inch pipeline valve. The static heads do not include head losses in the upstream system. The net head on the valves should be computed as the static head minus the upstream head losses. The upstream head losses can be computed as k multiplied times the pipe velocity head. For the 48 inch pipeline, k=0.68 and the corresponding velocity head is the velocity head in the 48 inch pipeline. For the 66 inch pipeline, k=1.93 and the corresponding velocity head is the velocity head in the 66 inch pipeline. The valve manufacturer shall provide rating curves, as well as rating tables, for each valve for the full range of valve openings and pool elevation and shall indicate on the rating curve where the performance requirements are met. The upstream head losses, as computed above, do not include any transition that may be required between the end of the piping and the valves. The head loss associated with such transitions should be added to the upstream head losses computed above. The manufacturer shall provide curves showing the cavitation and vibration characteristics of the valves under all possible operating conditions. Valves shall be capable of throttling all flows satisfactorily without cavitation at the design pressure, shall be rated for a static pressure of 150 psi, shall be equipped with ANSI B16.5 150 psi flanges, and retaining flanges and flange seals if the valves are wafer type. Valves shall incorporate multiple tapered control nozzles to control flow and reduce pressure. Valves shall be capable of providing a minimum of 80% energy dissipation at the flow requirements, as supported by empirical data from model testing. Flow discharges shall be contained so that they do not conically diverge at an angle greater than ten degrees from the longitudinal axis of the valve assembly, as indicated on Figures 1-3. If discharge shrouds are required to meet these discharge requirements, they shall incorporate a removable section to allow vertical lifting of the valves. Valve assemblies (including upstream straight pipe requirements) shall be sized to fit within the areas as indicated on Figures 1-3. Valves may be mounted either on the landside or waterside of the powerhouse spray wall; however, valves mounted on the landside must have piping/discharge shroud which will contain flow, without leakage, between the valve and waterside of the spray wall. If valve assemblies are mounted on the landside of the spray wall, no portion of the assembly, except for the piping/discharge shroud, may penetrate into the spray wall. The valve must remain accessible for maintenance and removal without dismantling the portion of the piping/discharge shroud which penetrates the spray wall. If valve assemblies are mounted on the waterside of the spray wall, no portion may extend beyond the spillway spray line indicated on Figure 1. Note that the piping or discharge shrouds will be mounted through holes to be made in the existing concrete walls at the elevations shown on Figures 2 and 3. Bidders are cautioned that the cross sections of the walls are trapezoidal (wider at the bottom) as indicated on the drawings. All openings in the wall will be sealed on the waterside to maintain the integrity of the wall. Should it be necessary to provide aeration to the piping/discharge shroud, if located on the landside of the spray wall, the aeration must be provided in such a manner that flow is contained without leakage. The valve manufacturer shall provide all components required for a complete operating valve assembly. The valves shall include all operating hardware and other appurtenances, and shall be supplied with all mounting components for the valve including, but not limited to, structural supports, mounting flanges with nuts, bolts, and seals, discharge shrouds and any transition or piping section that may be required between the flanged connection and the valve. Structural supports and transition or piping sections must be designed by a licensed structural engineer for seismic zone 3. WARRANTY: The manufacturer shall provide a five (5) year guarantee that the valves will perform satisfactorily under operating conditions. The manufacturer shall have a minimum of ten (10) years experience in the design and construction of valves meeting similar design conditions, which can be demonstrated to have operated successfully. NAICS Code: This procurement will be conducted under NAICS Code 332911. The size standard for this NAICS Code is: 500 Employees. The acquisition method is Request for Proposal (RFP) . For more information of the solicitation please contact the Contract Specialist, Beverly Hatfield, at 916-557-5232 or the Contracting Officer, Linda Hales, at 916-557-5156. ORDERING PLANS AND SPECIFICATIONS: (AVAILABLE ON PAPER COPY; FREE OF CHARGE) Plans and Specifications for this project must be ordered by the CUT OFF DATE of 10 April 2001 to ensure receipt of bid sets. Plans and specifications can only be ordered electronically by accessing Internet address http://ebs.spk.usace.army.mil/ Please complete the requested information to avoid a delay in your order. Orders received beyond the CUT OFF DATE of 10 April 2001 will not be honored. Plans and specifications will be mailed out on or about 16 April 2001. Because a limited number of sets will e reproduced, copies are limited to one set per firm. All responsible sources may submit a proposal which will be considered by the agency. See Note 26 (See Commerce Daily, Monday edition). For a listing of all Sacramento District projects, see Contracting Division's Internet Home Page at http://ebs.spk.usace.army.mil/ which is updated daily. Please note that all contractors and potential contractors must be registered with the Central Contractor Registration (CCR) database effective May 31, 1998. For instruction on registration with the CCR please see our web page.

Record

Loren Data Corp. 20010323/48SOL003.HTM (W-080 SN50G9H6)