MODIFICATION
99 -- VACUUM BOX FOR THE NEXT GENERATION LAUNCH TECHNOLOGY
- Notice Date
- 4/22/2004
- Notice Type
- Modification
- NAICS
- 333999
— All Other Miscellaneous General Purpose Machinery Manufacturing
- Contracting Office
- NASA/Lyndon B. Johnson Space Center, Houston Texas, 77058-3696, Mail Code: BH
- ZIP Code
- 00000
- Solicitation Number
- NNJ04057583Q
- Response Due
- 5/5/2004
- Archive Date
- 4/22/2005
- Point of Contact
- Michele H. Ladrach, Contract Specialist, Phone (281) 483-6096, Fax (281) 244-5331, Email michele.h.ladrach@nasa.gov - Tim A. Boyes, Contract Officer, Phone (281) 483-1838, Fax (281) 244-5331, Email timothy.a.boyes@nasa.gov
- E-Mail Address
-
Email your questions to Michele H. Ladrach
(michele.h.ladrach@nasa.gov)
- Description
- THIS NOTICE CONSTITUTES AMENDMENT NO. 1 TO THE COMBINED SYNOPSIS/RFQ FOR VACUUM BOX FOR THE NEXT GENERATION LAUNCH TECHNOLOGY. Companies shall acknowledge all amendment(s) in their quote. This notice serves as the official amendment to subject synopsis/RFQ and a written amendment will not be issued. The purpose of this amendment is to answer questions posed by interested parties. The due date for responses is extended until 4:30 p.m. CDT on May 5, 2004. All contractual and technical questions must be in writing (e-mail or fax) to Michele Ladrach not later than April 30, 2004. Telephone questions will not be accepted. Answers to questions posed are as follows: 1Q. Is solicitation # NNJ04057583Q "Vacuum Box" for the NGLT Reaction Control Engine considered a Liquid Oxygen tank and therefore requires a that level of cleaning? 1A. No. There are no requirements for LO2 cleaning. 2Q. Will NASA drawings in electronic format be made available to the fabricator? If so, in what format/software are they available? 2A. NASA 3-D model files can be provided in a Pro-E, STP, IGES, or other formats. Drawings can be provided in many formats (DXF, etc). PDF is also available. 3Q. Are there any limitations on the stiffener locations - both internal or external? 3A. There are limitations on internal stiffeners. In the design process, NASA can work with the vendor to agree on locations. External stiffeners also have limits such as 1? away from and not over flanges. 4Q. Please confirm that all external stiffeners, if used, may extend a maximum of 6" on each side (including top and bottom) to within the external envelope tolerance of +6" per side as stated on Note 8 on NASA Drawing SLN24100309? 4A. External stiffeners should be limited to 1 inch as noted in Question #3, but exceptions may be agreed to as required. 5Q. For the sides that have the structural flange extensions, is the +6" measured from the flange extension edge or from the side of the vacuum box? 5A. The +6 inches is from the side of the vacuum box. 6Q. Reference SOW Section 3.4.1; Are there more specific details of how the vacuum box is attached to the system's primary structure in order to avoid any potential interferences between the system primary structure and any external stiffeners, if used? 6A. Once this purchase order has been awarded,NASA can provide those details. Basically all box features must be away from surface of the attaching brackets on top and bottom of the box. 7Q. Materials of construction are shown on NASA drawings as 304L/316L. May dual certified 304/304L or 316/316L grade materials be used or is there a preferred/required grade of stainless? 7A. Dual grade materials are accepatable. 8Q. What proper clearances (envelope area/space) must be maintained around all flanges both on the inside and outside surfaces of the vacuum box? 8A. Cylinder of 1" radius around flanges and extending outward from box. 9Q. Reference NASA Dwg SLN24100309, Note 9; Is there a specific, measurable value that would be used to define the final surface finish requirements for both the internal and external pieces of plate material used to construct the vacuum box? 9A. One direction sanded finish per plate with no pits or blemishes with 63 microinch finish or better. 10Q. Reference SOW Section 5.1; Shall the contractor assume the contract kick-off meeting will be held at the contractor's facilities? 10A. Yes. 11Q. We are respectfully requesting a bid due date extension to May 7, 2003. 11A. NASA is extending the due date for proposals to 4:30 CDT May 5, 2004. 12Q. Reference SOW Section 3.5.5; In addition to the proof pressure test, we are assuming a helium mass spectrometer leak test with a defined retention period will be part of the test requirements confirming the vacuum box is capable of being pumped down to and maintained at a pressure of 1x10-6 torr. 12A. That would be an acceptable test. 13Q. Are there any other additional verification or performance tests required? 13A. Other test requirements (other than proof, leakage/vacuum) would be the verification of dimensions, drawing requirements. 14Q. Must the contractor provide the mating blind/blank flanges, gaskets and mounting hardware for any and all flange connections that do not have optical viewports installed? Are all mounted for shipment to the jobsite with the vacuum box shipped under vacuum or a small positive pressure or just temporary covers/closures that are not vacuum tight with the mating components shipped loose? 14A. Yes. The vendor will need to provide those required to be able to accomplish testing at the vendor. 15Q. Are spare parts required such as gaskets for all conflats? 15A. No. Spare parts are not required. 16Q. Any necessary provisions to be incorporated onto the vacuum box for lifting, moving, handling or supporting? 16A. The hole features top and bottom are intended for attachment of any lifting features. The vendor will need to provide any features or devices required for lifting in their facility. 17Q. Source for full access to all NASA standards and specifications referenced in the subject solicitation? 17A. http://standards.nasa.gov/ 18Q. Under Evaluation-Commercial Items #1 wants information on 3 past Vacuum Chamber contracts. Is this information on work that we have already done? Or is this information that you would supply on the last 3 contractors that have already made these vacuum chambers? 18A. Information on work the contractor has already completed. 19Q. Ref.: Note # 9 on Drawing # SLN24100309 -- (a) Is a #1 pickled mill surface sufficient on plates? (b) Is some level of polish required? 19A. a. Pickling is not preferred. b. The Surface finish of 63 microinch or better. 20Q. Drawings: Two decimal tolerances are often not realistic on weldments. Can tolerance exceptions be taken on drawings with NASA approval? 20A. Yes. Exceptions may be taken on dimension tolerances. 21Q. Regarding this requirement on the capability to absorb 250 BTU/Hr heat leak from each of the tree RCE's and continue to function normally as stated in 3.4.2.6 It is assumed that "function normally" means to provide the requisite support during normal operating conditions. It is also assumed that the maximum temperature the box would reach would be the interface temperature of 250 F. The design will be based on the boxreaching 250 F during normal operating conditions as stated in 3.7.2.2. No heat transfer calculation would be required. - Please confirm - Alternatively, if this interaction is not correct and the heat absorption capability of the box needs to be calculated them please provide the heat sink conditions internal and external to the box during test firing of the engines (i.e. outside full vacuum at a constant 70 F, and inside full vacuum at the interface temperature of 250 F.) 21A. It is correct that no heat transfer calculations are required on the vendor. The SOW/specification should have only stated the maximum temperature. 22Q. Does the weight limitation for this chamber include the weight of the closure flanges, viewports and hardware or only the chamber as shown on the applicable drawing? 22A. It only includes the chamber as shown in the drawings and door as indicated in the SOW. 23Q. What is the maximum deflection allowed for the sides and door of the chamber? 23A. The only requirements that would affect maximum deflections are the factors of safety on stresses and leakage. Otherwise there are no specific limitations on deflections. 24Q. Since the flanges on some walls prevent optimum location of reinforcing beams, can the reinforcing beams be placed inside the chamber? That being asked, would the chamber inside walls then have to be moved out to preserve the inside dimensions? 24A. Reinforcing beams can be placed on the inside of the chamber on a case by case basis. The walls would not need to be moved out. 25Q. Again, speaking of the necessary reinforcement for the chamber walls. Is there a "keep away" zone around any of the flanges (internal or external to the chamber) that is needed for the attachment of the apparatus that will be connected thereto? 25A. The primary keep-out zones are near the 3 engine interface flanges where the 1000 lbf load is applied. However NASA will work with vendor to allow reinforcement in these areas, if necessary. 26Q. I have read the synopsis for this solicitation but do not find a link to the SOW. Can you tell me where it is? 26A. Check the following website. Look under the synopsis/solicitation number. All required documents can be retrieved from this location. http://procurement.nasa.gov/cgi-bin/EPS/bizops.cgi?gr=D&pin=73 Companies shall provide the information stated in the synopsis/RFQ posted on the NASA Acquisition Internet Service (NAIS) on April 12, 2004. Documents related to this procurement are available over the Internet. These documents 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/JSC Business Opportunities home page is http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=73 Offerors are responsible for monitoring this site for the release of the synopsis/solicitation and any amendments. Potential offerors are responsible for downloading their own copy of the synopsis/solicitation and amendments (if any).
- Web Link
-
Click here for the latest information about this notice
(http://prod.nais.nasa.gov/cgi-bin/eps/bizops.cgi?gr=D&pin=73#109741)
- Record
- SN00571317-W 20040424/040422212539 (fbodaily.com)
- Source
-
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