WY- Fire Suppression System - Resetting and Recharge for the Casper Control Cen
This is not a solicitation announcement. This is a sources sought synopsis only. The purpose of this synopsis is to gain knowledge of potential qualified sources and their size classification (hubzone, 8(a), small, small disadvantage, veteran owned, women owned or service disabled veteran owned small business) relative to NACIS 811310. Written responses to this synopsis will be used by the Government to make appropriate acquisition decisions. After review of the responses to the sources sought synopsis, a solicitation announcement will be published in FedConnect website. Responses to this sources sought synopsis are not considered adequate responses to the solicitation announcement. All interested offerors will have to respond to the solicitation announcement in addition to responding to this sources sought announcement.
The Bureau of Reclamation, Wyoming Area Office (WYAO) is seeking sources to reset and recharge fire suppression system. Services include checking all rigid pipe supports and all fitting connections. Removing nozzles off of the piping, inspecting for damage, corrosion, or obstruction, clean and re-install. Valve teardown, remove actuators, remove piping and discharge hose from valve outlet, and remove empty tanks from brackets. Rebuild valves and O-rings replaced prior to tanks being recharged. After valve teardown, performance of Leak Test and Pre-Dome Test. Refill empty tanks.
The contractor shall be able to perform the following tasks:
Check Mechanical and Electrical Equipment:
Piping and Nozzles: A fire condition could cause damage to the piping and nozzles and possibly support members. Check all rigid pipe supports and all fitting connections. Take the nozzles off the piping, inspect for damage, corrosion, or obstructions, clean and re-install.
Electric Detection System: Before resetting release mechanism, bleed pressure from actuation piping by pulling ring on safety relief valve located on actuation piping.
Valve Teardown: Note: In order to maintain Factory Mutual approval, factory filled SAPPHIRE tanks must be used.
1. Remove empty SAPPHIRE tanks by removing the actuators (either electric or pneumatic).
2. Remove piping and discharge hose from valve outlet and remove empty tanks from brackets.
3. Tank valves must be rebuilt and all O-rings replaced prior to tanks being recharged. Follow instructions listed in Step No. 4 and 4a.
4. 1 in and 2 in. Valves B? Valve cleaning/O-ring replacement instructions. Refer to Figure 1 for component descriptions.
The following components are required for valve rebuilding:
- Bonnet assembly, Part No. 570543 for 1 in., Part No. 570541 for 2 in.
- Piston assembly, Part No. 570551 for 1 in., Part No. 570552 for 2 in.
- O-ring kit, Part No. 570559 for 1 in., Part No. 570584 for 2 in.
- If necessary, recoil cap assembly, Part No. 570553 for 1 in., Part 570554 for 2 in.
o Remove the valve from the tank.
o Remove the siphon tube locking screw to allow removal of the siphon tube from the valve.
o Remove the socket head cap screw that hold the recoil cap chain to the valve body.
o Remove bonnet locking screw from the same port as socket head cap screw mentioned in Step B?cB? and unscrew the bonnet assembly, using the spanner wrench, Part No. 57054. Remove and
discard O-ring from bonnet assembly.
o Remove the piston assembly by pushing up on it from the bottom of the valve. Discard complete piston assembly.
o Remove collar O-ring, and siphon tube O-ring. Discard both.
o Clean all internal valve surfaces. Use caution not to cause any scratching to surfaces.
o Use O-ring kit, Part No. 570559 for 1 in. or Part No. 570584 for 2 in., to replace with all new O-rings. Apply Dow Corning No. 4 lube to all O-rings before installing on components.
o Push in new piston assembly.
o Screw in bonnet assembly, including new O-ring. Tighten with spanner wrench.
o Thread in bonnet locking screw followed by washer, chain and socket head cap screw. The cap screw holds the recoil cap chain to the tank valve body.
o Install collar and siphon tube O-ring. Before installing, coat with Dow Corning No. 4 lube.
o Push siphon tube into base of valve and rotate until locking screw hole in the siphon tube is aligned with the siphon tube locking screw hole in the valve base. Install siphon tube
locking screw.
o Do not install valve into tank until Step B?1gB? in B?filling instructions.B?
4a. 3 in. Valve- Valve cleaning/O-ring replacement instructions.
The following components are required for valve rebuilding:
- Top cap assembly, Part No. 570598
- Piston assembly, Part No. 570601
- O-ring kit, Part No. 570599
- If necessary, recoil cap assembly, Part No. 570600
- Remove valve from tank. Note: Siphon tube for 3 in. valve stays in the tank collar.
- Unscrew top cap.
- Remove body and collar O-rings. Replace with new O-rings in a later Step.
- Remove the piston from the valve body and discard.
- Clean inside surfaces of valve body. Be careful not to scratch surface. Spray a small quantity of PTFE silicone into the inside of the valve.
- Lubricate top cap O-ring with PTFE silicone and install into upper groove on valve body.
- Lubricate collar O-ring with PTFE silicone and install on valve collar threads.
- Lubricate piston O-rings with PTFE silicone and install piston in valve body.
- Install top cap on valve body. Hand tighten.
- Valve assembly is now ready to be leak tested.
Testing: On completion of the valve tear down, the valve assembly requires two tests B? Leak Test and Pre-Dome Test (Pre-Dome Test is required only if burst disc had been changed).
The tests must be conducted using a nitrogen source, a test bottom cap, close down adapter, and an outlet filling adapter. See Figure 3 test Station Component Layout.
1. The valve assembly is assembled to the test bottom cap. The outlet adaptor is assembled to the valve outlet. Attach the nitrogen line and make certain the vent valve on the outlet adaptor is closed.
2. Burst Disc Pre-Dome Procedure 0 Open the nitrogen regulator to 580 psi (40 bar) and slowly allow pressure to the valve through the bottom test cap. This is to pre-dome the burst disc. Hold this
pressure for 1 minute to ensure that there is no drop in pressure indicted by the rest gauge on the nitrogen test set-up.
3. Pour water/soap solution into the top cap Schrader valve and apply leak detection spray to all ports on the valve. If no leaks are detected, the pressure to the valve must be reduced to 363 psi (25
bar) and the close down adaptor must be attached. To close the valve piston, increase the nitrogen pressure to the close down adaptor to 580 psi (40 bar).
4. Check for leaks.
5. Slowly release the gas pressure from the nitrogen test set-up, vent the close down adaptor, and make certain that the outlet filling adaptor is opened before removing the adaptors.
6. If a leak had been detected, it must be rectified and retested. If the leak persists, the valve assembly must be rejected.
Recharge Instructions:
1.
a. See Figure 4 for a typical recharge station configuration.
b. Install a drier (such as Hammond DRIERITE filter) in a threaded port on the Novec 1230 agent container. A drier is required because humid air may cause the agent to convert to an acid.
c. The outlet of the container requires an inline (20 micron or smaller) filter.
d. The agent can either be pumped or gravity fed to the tank.
e. Tank must be visually inspected and clean inside. IMPORTANT B? No Moisture is allowed in the tank. It must be completed dried. Water mixed with agent will cause acid.
f. Rebuild valve. See B?Valve Rebuild Instructions,B? Step 4 and 4a.
g. Reinstall valve and siphon tube assembly into tank. Tighten securely.
h. Purge tank by pressurizing through a Outlet Fill Adapter Assembly (see chart on Page 9-2) to 100 psi (6.9 bar) with dry nitrogen, then vent pressure. This process will remove humid air from the
tank.
i. Fill tank with correct amount of agent by weight. See nameplate for this information.
j. Set regulator to 20 psi (1.4 bar) lower than the required tank pressure based on ambient temperature. Refer to pressure vs. temperature chart in this section. Pressurize tank. Agitate tank while
pressurizing.
k. After correct pressure is reached, close valve near tank valve outlet.
l. Close tank valve by using Top Adaptor Assembly, Part No. 570579, as follows. Set regulator to 450 psi (31.0 bar). Pressure Top Adaptor Assembly. Open and close the valve rapidly to prevent over-
pressurizing of tank.
m. Vent pressure from tank valve outlet.
n. Remove Fill Adaptor Assembly and install recoil cap on valve outlet.
o. Agitate tank by rolling or inverting so that the agent can absorb the nitrogen.
p. Add more nitrogen through the Top Adaptor Assembly. Using the pressure vs. temperature chart at ambient temperature, set the regulated pressure at the corresponding pressure plus 8 psi (0.6 bar).
It takes 8 psi (0.6 bar) to overcome the spring force in the valve core. Note: Do not use gauge on valve to determine recharge pressure.
q. Repeat Steps B?oB? and B?qB? until the agent has fully absorbed the nitrogen.
r. Let tank assembly sit for 3 hours.
s. Check the tank valve for leaks by using soap and water solution.
t. Check tank gauge pressure based on pressure vs. temperature chart.
u. Repeat Step "o".
v. Recheck gauge pressure. If gauge reading decreased, repeat Step "p."
w. Once tank pressure is correct, remove from fill station.
2. Replace recharged tanks in bracket and follow B?installationB? procedures to put system back in service.
3. Inform proper personnel that the system is back in service.
The contractor is responsible for the management and quality control actions necessary to meet the quality standards set forth by the Purchase Order (PO). The contractor shall establish and maintain a Quality Control Plan (QCP) to ensure that all requirements of the PO are met.
Extra Work and Deficient Conditions: The contractor shall notify Reclamation as soon as possible when it is apparent that extra work is required like rewinding armatures, field coils, etc. If deficient conditions are found, the contractor shall notify Tonya A. Pittsley. Deficient means out of limit conditions for inspections or tests that are specified herein or found in accepted national or industry standards. Deficient also means conditions that would not permit the exciter to be returned in an "as-new" condition.
Pittsley, Tonya A
tpittsley@usbr.gov
