NASA Langley Research Center, MS 144, Industry Assistance Office Hampton, Va. 23681-0001

Z -- S/M FOR MODIFICATIONS TO THE TRANSONIC DYNAMICS TUNNEL FOR HEAVY GAS CONVERSION SOL 1-71-GGK1.1149 DUE 082195 POC Bid Distribution Office,(804)864-2547. The Transonic Dynamics Tunnel Heavy Gas Conversion Project is a major Construction of Facilities (CoF) project which will provide the process, mechanical, and electrical modifications required to convert the NASA Langley Research Center's Transonic Dynamics Tunnel (TDT) from heavy gas operations using dichlorodifluoromethane (R 12) as the test medium to operations using 1,1,1,2 tetrafluroethane (R 134a) as the test medium. The work to be performed under this contract includes the following heavy gas reclamation system modifications: a.) disassembly, inspection, rework, and testing of a Clark, 5 stage, 8500 cfm reciprocating compressor, b.) removal of existing large diameter pulsation bottles, and subsequent installation of new ASME coded pulsation bottles with associated orifice plates and piping modifications, c.) modification of heavy gas system piping, d.) piping, instrumentation, and structural modifications to existing cryogenic cold boxes, e.) removal of existing and subsequent installation of a new fill station for the heavy gas liquid storage tank, f.) modifications to process gas dryers, and g.) a complete rework of the heavy gas system electrical controls, including control room modifications (which includes the removal of asbestos floor tiles), wiring and conduit installation, field device installation, process monitoring system installation, and subsequent point to point checkouts and loop verifications. Other work to be performed under this contract includes: h.) the installation of a chilled water refrigeration system, i.) fabrication and installation of five hydraulic lift and lube systems for the main drive, j.) design, fabrication, and installation of a cooling water sump filtration system, and k.) installation of two Government furnished 17,000 cfm vacuum blowers. Specialized experience is required in the area of the compressor overhaul and ASME coded vessels, and bidders will be required to provide certifications and experience history. Several tasks will require rigging and lifting of large heavy components and materials. The contractor will be required to develop a detailed construction schedule utilizing commercial software, and provide periodic updates, analysis, and projections. Due to the diversity of the tasks required, and the large amount of integration effort that will be necessary to complete the work on schedule, the Government intends to encourage partnering with the contractor. A pre-bid conference, including a site visit, will be held on August 16, 1995, at Langley Research Center. The contract is expected to be awarded by the end of September 1995, and on site construction is scheduled to coincide with a tunnel shutdown, from early May 1996, to the end of March 1997. Contract duration 547 days--Estimated cost range between $1,000,000 and $5,000,000--All responsible sources may submit a bid which will be considered by the Agency--Bid opening date is approximate--Solicitation available approximately 7/21/95. (0180)

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