NASA/George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

66 -- VACUUM CHAMBER SOL 8-1-9-00-C4808 DUE 051300 POC Marlyce E. Alexander, Contract Specialist, Phone (256) 544-8344, Fax (256) 544-2812, Email marlyce.alexander@msfc.nasa.gov -- George E. Pendley, Contracting Officer, Phone (256) 544-2949, Fax (256) 544-2812, Email george.pendley@msfc.nasa.gov WEB: Click here for the latest information about this notice, http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=D&pin=62#8-1-9-00-C4808. E-MAIL: Marlyce E. Alexander, marlyce.alexander@msfc.nasa.gov. THIS NOTICE CONSTITUTES AMENDMENT NO. 3 TO THE COMBINED SYNOPSIS/RFO FOR VACUUM CHAMBER SUPPLEMENTED WITH ADDITIONAL INFORMATION CONTAINED IN THIS NOTICE. Companies shall acknowledge all amendment(s) in their offer. This notice serves as the official amendment to the subject solicitation and a written amendment will not be issued. The purpose of this amendment is to revised the specification and delivery time of six (6) months. The revised statement of work is as follows: 7Vacuum Chamber with 108" OD, 240" overall length (including ends) 7Manufactured from type 304 stainless steel 7180 grit brushed ID and glass bead blasted OD finish 7Chamber will have the following ports as required (see sketch for placement): (11) 11" OD grooved ASA ports, 8" OD tubing (6) 16" OD grooved ASA ports, 12" OD tubing (2) 21" OD grooved ASA ports, 16" OD tubing (4) 32" OD grooved ASA ports, 24" OD tubing (4) 13.5" OD flat ASA ports, 10" OD tubing 71 MW uniformly distributed heat to walls cooled with water cooling (200 psi)trace spaced 5" apart, cylindrical part of chamber only. 1.00" rectangular tubes with .065" thickness swagelock fittings acceptable 7Hinged, domed, Vitron o-ring sealed bolted door one end, other domed end bolted. 7Interior support angle beams (6"x6") welded to chamber walls in 4 locations. See sketch for placement. Threaded holes (1/2"-13) every 6" along top of beam. 7Custom stainless steel saddle supports (qty 5) to distribute weight under 350 lb/ft2 empty or 900 lb/ft2 fully loaded with 20k lbs test article and water. Through holes at various locations around foot pad. 7Engineering drawings will be sent for approval prior to manufacture 7Straps can lift the chamber. Several lifting lugs per door. 7Chamber will be leak checked with a helium mass spectrometer. 10^-9 scc/sec GHe. 7Chamber will be vacuum washed with all ports covered with aluminum foil and capped for shipment 7Tolerances: 1 0.125" linear, 1 0.50 angular 7Blanking flanges & O-rings included 7TIG welding acceptable. Offer shall consult the revised vacuum chamber drawing (drawing revision 2)provided on the NAIS and CBD The due date for receipt of offers is extended to May 13, 2000. Offers shall provide the information stated in the synopsis/RFO posted on the NASA Acquisition Internet Service (NAIS) and published in the CBD on March 1, 2000 . Documents related to this solicitation will be available over the Internet. These documents are in Microsoft Office Suite (Word 6.0, Excel 5.0, or PowerPoint 4.0) format and reside on a World Wide Web (WWW) server, which may be accessed using a WWW browser application. The Internet site, or URL, for the NASA/MSFC Business Opportunities home page is http://nais.msfc.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=CL&pin=62 Posted 04/28/00 (D-SN449596). (0119)

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