Loren Data's SAM Daily™

FBO DAILY - FEDBIZOPPS ISSUE OF MARCH 30, 2018 FBO #5971
SOURCES SOUGHT

60 -- Fabrication, Assembly, and testing of components for SLAC ultra high vacuum (UHV) systems

Notice Date

3/28/2018
 

Notice Type

Sources Sought
 

NAICS

332919 — Other Metal Valve and Pipe Fitting Manufacturing
 

Contracting Office

Department of Energy, SLAC National Accelerator Lab, SLAC National Accelerator Lab, 2575 Sand Hill Road, Menlo Park, California, 94303, United States
 

ZIP Code

94303
 

Solicitation Number

SLAC_RFP_286109(JJ)
 

Archive Date

4/13/2018
 

Point of Contact

JENNIFER L. JAMISON,
 

E-Mail Address

jjamison@slac.stanford.edu
(jjamison@slac.stanford.edu)
 

Small Business Set-Aside

N/A
 

Description

SLAC seeks vendors to provide the following: Fabrication of U.H.V. Components (Technical Specification is listed below. Drawings will be sent out with the formal Request for Proposal.) This specification outlines the required procedures to be followed by external suppliers and/or by SLAC shops in the fabrication, assembly, and testing of components for SLAC ultra high vacuum (UHV) systems. Figure 1 illustrates the full process sequence that results in a "ready-for-installation" (RFI) assembly, but breaks the sequence into two possible levels of effort: (A) a job deliverable that requires achieving only leak tightness and UHV cleanliness, and (B) a job deliverable that requires additional processing to meet both RGA (residual gas analysis) and outgassing requirements. Most external suppliers are asked to deliver assemblies that satisfy "A" requirements, and SLAC shops complete the "B" requirements. •Unless otherwise specified in the engineering drawings or by an accompanying Statement of Work (SOW), •To satisfy "B" requirements, all portions of this specification apply. •To satisfy "A" requirements, all portions of this specification apply, except Section 6. •The SLAC Responsible Engineer is responsible for determining which sections do not apply and ensuring that the instructions are clearly stated in the engineering drawing notes. •Any deviation from this specification by suppliers and/or SLAC shops must receive prior approval from the SLAC Responsible Engineer, and be recorded as a Non-Compliance Report (NCR). 1. MATERIALS SPECIFICATIONS AND CERTIFICATIONS A. All materials must be purchased to an ASTM, AMS or other SLAC approved specification as called for on the drawing or purchase order. B. Original mill source certifications must be obtained for all metals. C. As a minimum, certifications must include the heat number and the results of actual chemical analysis and mechanical properties tests. D. Copies of certifications must accompany delivery of the finished parts to SLAC. E. Ordinary "Certs" or those with minimum or typical chemistries or properties are not acceptable. 2. FABRICATION A. Flanges: 1. The knife-edge sealing surface of all UHV flanges must be examined before machining. 2. Vendor must reject any flange having a knife-edge defect. 3. To avoid damage, the knife-edge must be protected at all times during handling and machining. 4. Methods which permit machining without removal of the protection should be used. 5. Flanges received with knife-edge defects after machining will be rejected by SLAC. 6. The specification for stainless steel knife-edge flanges is SLAC Doc. No. PS-202-631-04. B. Lubricants: 1. Cutting fluids and other fabrication lubricants which contain more than 0.005% (50 ppm) sulfur are prohibited unless an exemption is specifically obtained from the SLAC Responsible Engineer. 2. SLAC Klystron Department Document No. SC-700-866-47 contains a list of approved lubricants. C. Machining: 1. Transition Materials: a. Machining aluminum-to-stainless steel transition material requires: i. Light cuts to avoid excessive stress on bonded junction ii. Adequate cooling - part temperature must not exceed 150°F iii. An identification number if transition material is serialized. b. Pre-testing is required for bond widths deviating from requirements in Section 2 of SLAC Doc. No. PS-202-631-05, "Recommended Practice - Transition Material." The pre-testing process is described in Section 8 of the same reference. Vendor shall supply pre-test results to the SLAC Responsible Engineer. 2. Grinding, Sanding, Polishing and De-Burring: a. The use of sanding discs, grinding wheels or abrasives is prohibited unless specifically called for. b. Acceptable techniques and materials for de-burring and polishing are given in SLAC Doc. No. SC-700-866-49. D. Cleaning (post-machining): 1. Parts may be wiped down to remove excess lubricants. 2. Vapor degreasing of parts by vendor may be applied only if the degreaser is charged with fresh degreasing fluid and is maintained per its manufacturer's recommendations. E. Welding. 1. Parts to be welded must be cleaned prior to welding. i. Pre-welding cleaning process and sequence can impact the final UHV cleanliness levels. ii. Vendor-selected pre-weld cleaning process must be compatible with part's or assembly's final UHV requirements at ready-for-install. iii. Vendors must provide pre-welding cleaning sequence and process to SLAC engineering for review as part of the vendor selection process. iv. The selected vendor is expected to provide travelers as proof of compliance to the vendor's own approved process. v. Parts/assemblies with embedded contaminants that compromise UHV cleanliness requirements will be rejected by SLAC. 2. All welds must be Gas Tungsten Arc process (GTAW) or a process that is approved by SLAC Responsible Engineer. F. High Temperature Furnaces: 1. See Section 5, Clean Firing, below for guidelines. 2. Vacuum furnaces may be used with prior approval of the SLAC Responsible Engineer. 3. Process requirements are specified on the drawing. G. Parts Inspection. 1. Parts must be inspected for conformance to the drawing dimensions and other requirements. 2. Copies of inspection reports must be made available. H. EDM (Electrical Discharge Machining). 1. EDM is permitted if part is labelled as EDM-machined and if EDM-residue is removed by etching. Vendor's etch process must be approved by SLAC Responsible Engineer. 3. UHV STANDARDS A. Cleaning processes that can achieve UHV standards 1. For any vendor-selected cleaning process, the point of application in the fabrication sequence shown in Figure 1 matters. 2. Vendor-selected UHV cleaning process and fabrication sequence must be documented, reviewed, and approved by SLAC prior to issuance of a purchase order. 3. SLAC will verify the documented processes by evaluating the vendor's first article. 4. SLAC will monitor the vendor for conformance to the approved vendor process. 5. The selected vendor is expected to provide travelers as proof of compliance to the vendor's own approved processes. 6. Some cleaning processes may compromise the integrity of vacuum flange knife edges (see Section 2A) or the integrity of vacuum bellows. The vendor must provide to SLAC for approval the intended manufacturing sequences of assemblies containing these kinds of parts. 7. Possible UHV cleaning processes used singly or in combination, include but are not limited to: i. Chemical cleaning ii. Passivation iii. Electro-polishing iv. Vacuum firing v. Aqueous solution ("wet") cleaning with air dry vi. Vacuum bake B. UHV Handling and Packaging 1. Parts that have been chemically cleaned, furnace fired, etc., must not be touched with bare hands. 2. Parts must be handled only with SLAC approved clean room gloves that are powder-free Latex or powder-free Nitrile. 3. All handling and assembly of cleaned parts must take place only in a Class 100,000 or better Clean Room, unless the SLAC Responsible Engineer has specified that the part or assembly will be subjected to further wet cleaning processing. 4. For parts/assemblies to meet leak test and UHV cleanliness requirements ("A" in Figure 1): i. For storage or transit, wrap parts with U.H.V. aluminum foil per SLAC specification PS-202-100-01. ii. Using clean room gloves, parts must then be placed in clean, covered containers sealed with 3M #471 vinyl tape or equivalent. Very large parts such as long tubes, or aluminum extrusions may be wrapped in "blue line" neutral kraft paper after first sealing all openings with the above approved U.H.V. aluminum foil. 5. For parts/assemblies that fully meet RGA and outgassing requirements ("B" in Figure 1): i. Part/assembly openings except one blanked off, and the part/assembly must be vented with boiled off nitrogen ii. Part/assembly must be backfilled with boiled-off nitrogen, and then the single remaining opening sealed by pinch-off. iii. For transit and storage, wrap sealed assembly in two layers all-virgin polyethylene Type II, Class 2 per Military Specification A-A-3174. C. "DO NOT OPEN" Labels. 1. Vendors fabricating parts to UHV standards must affix several "DO NOT OPEN" labels to all shipping containers. See reduced size illustration below. 4. LEAK TESTING A. This section applies to any part or assembly that forms a vacuum barrier or wall. B. Leak test per "SLAC Leak Test and Mechanical Integrity Standard," SLAC-I-141-201-004-00. Reject any part which, when probed with helium for at least one minute, results in a leak greater than 2x10-10 std cc/sec, unless otherwise specified on the drawing. C. Any deviation from this leak test specification by suppliers and/or SLAC shops must receive prior approval from the SLAC Responsible Engineer, and be recorded as a Non-Compliance Report (NCR). 5. CLEAN FIRING A. If contaminated during manufacturing or leak testing, UHV ceramic or metal parts, except stainless steel parts (see Sections 5.C to 5.F below), may be clean fired with hydrogen or inert gas. B. If the brazing process permits, ceramic-to-metal parts can be clean fired in dry hydrogen at 550oC for a minimum of 15 minutes. Furnace cool in hydrogen to 100oC or less. Purge with dry nitrogen (boiled off from liquid nitrogen or dry nitrogen with purity equivalent to gas boiled off from liquid nitrogen ) and continue furnace cooling to less that 70o C prior to opening furnace. Handle per Section 3B above. In case the metal is stainless steel, see below and consult with the SLAC Responsible Engineer C. Pre-firing of stainless steel bellow in hydrogen atmosphere is not permitted D. 304L Stainless steel must not be vacuum fired therefore it must not be clean fired with hydrogen but just with inert gases. E. 316L and 316LN Stainless Steel that contain Boron in more than 9 ppm, must not be vacuum fired therefore they must not be clean fired with hydrogen but just with inert gases. 6. PROCESSING ASSEMBLIES FOR READY-FOR-INSTALLATION A. This section addresses the steps in Figure 1 that are required to meet Ready-for-Installation (RFI) requirements. The directions in this section are applied by a vendor ONLY IF specified in the vendor statement of work or PO. B. Part/assembly is assumed to have been processed per this specification's requirements to meet leak test and basic UHV cleanliness requirements ("A" in Figure 1). C. Applying UHV handling requirements, the part/assembly is prepared for and then vacuum baked at a temperature and for a time specified by SLAC engineering. The complexity of the part/assembly may require multiple cleaning/verification steps. D. A RGA (Residual Gas Analysis) scan is taken of the part/assembly at 150°C (see Appendix A.2 for acceptance requirements) E. The part/assembly's outgassing is measured (see Appendix A.3 for acceptance requirements). F. Part/assembly is then prepared for transport and storage per Section 3. 7. SUMMARY OF REFERENCED DOCUMENTS Document NumberDocument Title 1PS-202-631-04Stainless Steel Flanges for UHV Applications 2SC-700-866-47Specification Kly & Vac Components Machining Fluids 3PS-202-631-05Recommended Practice - Roll-Bonded Aluminum to Stainless Steel Transition Material 4PS-202-631-09Specification for Procurement: Roll Bonded Aluminum to Stainless Steel Transition Material 5SC-700-866-49Klystron and Vacuum Components Machining, Deburring, Polishing 6PS-202-100-03Vacuum Firing of Stainless Steel Components for UHV 7PS-202-100-01Specification for Aluminum Foil Ultra High Vacuum Applications 8SLAC-I-141-201-004-00SLAC Leak Test and Mechanical Integrity Standard Appendix A: UHV Acceptance Criteria 1. Leak Tight: Helium leakage rate of < 2x10-10 std. cc/sec helium. Test performed per SLAC-I-141-201-004-00 on each item or subassembly. 2. RGA Acceptance: Mass spectrometer scan performed at 150°C on each lot of components in the same test chamber (common thermal and vacuum volume). 2.1. The residual gas analyzer must have: 2.1.1. A minimum scan range of 0 to 100 amu 2.1.2. The minimum detectable partial pressure must be < 1 x 10-13 Torr. 2.2. The resultant scan must show: 2.2.1. Total Pressure < 1.0 x10-8 Torr on separate total pressure gauge, in the same vacuum volume. 2.2.2. No peaks over 5 x 10-12 Torr for masses over 44 amu 2.2.3. Sum of peaks over 44 amu no higher than 1 x 10-11 Torr. 2.3. Table 1 details the RGA scan approval criteria for SLAC AD UHV vacuum qualifications, for RGA systems reporting in pressure units. Table 1 3. Total Outgassing: For each production run fabricated with the same material lots and processes. A change of material lot or process specification shall require retest of total outgassing. As specified by component/assembly drawing, if present, otherwise a value < 2X10-12 Torr-L/sec-cm2 of surface area exposed to vacuum shall be demonstrated per "Recommended practices for measuring and reporting outgassing data" P. A. Redhead, Journal of Vacuum Science & Technology A 20, 1667 (2002). THIS IS NOT A REQUEST FOR QUOTE. VENDORS INTERESTED IN BEING CONSIDERED AS A POTENTIAL SOURCE SHOULD IDENTIFY THEMSELVES AS AN "INTERESTED PARTY" VIA THE FBO PORTAL. DO NOT CONTACT THE SUBCONTRACT ADMINISTRATOR.
 

Web Link

FBO.gov Permalink
(https://www.fbo.gov/spg/DOE/SLAC/STAN/SLAC_RFP_286109(JJ)/listing.html)
 

Place of Performance

Address: SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California, 94025, United States

Zip Code: 94025
 

Record

SN04870145-W 20180330/180328231709-3d88b9ff6715ea8f4096a5256bdf0574 (fbodaily.com)
 

Source

FedBizOpps Link to This Notice
(may not be valid after Archive Date)

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