Loren Data's SAM Daily™

FBO DAILY ISSUE OF SEPTEMBER 13, 2006 FBO #1752
SOLICITATION NOTICE

J -- Davis Dam Guide Bearing Rebabbitting

Notice Date

9/11/2006
 

Notice Type

Solicitation Notice
 

Contracting Office

Bureau of Reclamation, Lower Colorado Region Contracting Office P.O. Box 61470 Boulder City NV 89006
 

ZIP Code

89006
 

Solicitation Number

06SQ303295
 

Response Due

9/18/2006
 

Archive Date

9/11/2007
 

Small Business Set-Aside

Total Small Business
 

Description

The Bureau of Reclamation, Davis Dam Field Division, Bullhead City, AZ, has a requirement for repair of two guide bearings. Repair two guide bearings, one 40" X 15", four segment upper guide and one 48" X 18", four segment lower guide bearing, in conformance with the requirements defined in the attached drawings, and specified herein. The 48" X 18" bearing is out of round by approximately .015" ID. The quote shall include restoring the bearing to specified dimensions and rebabbitting if required. Bearing shell machining may be required. The 40" X 15" bearing has loose Babbitt and requires rebabbitting. All dimensions shall be verified to attached drawings. The quote shall include the cost of all labor, materials, and equipment necessary to complete the job, including the following testing and certifications: 1. Certificate of Ultrasonic Testing. 2. Certificate of verification of the babbitt material and specifications used. 3. Copy of quality control inspection report. 4. Certificate of babbitt material analysis. The quote shall include shipping to and from the location of refurbishment. Extra care must be taken during shipping and handling as not to damage the bearings in any way. The Davis Dam Field Division will provide shipping containers for the bearings. The estimated weight of the bearings and their packaging crates is: lower guide - 850 lbs. upper guide - 750 lbs. SCOPE OF TECHNICAL WORK The old babbitt shall be removed from each bearing shell by machining and/or controlled heating procedures. The new babbitt is to be spin cast on the bearing shell. Stop-off shall be applied to areas not to be tinned to prevent tinning compound from sticking. The babbitt lining shall be anchored to the bearings by dovetailing and molecular bonding and confirmed by ultrasonic testing. Prior to final machining and/or any dimensional checks, the bearing split line bolts shall be torqued to a value of 200-250 ft-lbs. Final diameter readings taken at the mating ends of both shell halves shall not vary by more than .002". Final surface finish shall be 32 RMS or smoother for all bearing surfaces. All other dimensions are to be the same as shown on the drawing. Maintain grooves on the babbitted bearing surfaces as shown on the drawings. Drill and tap all holes in the babbitted areas for instrumentation as shown on the drawing. Special care shall be taken to ensure that the shell maintains final roundness dimensions as specified on the drawings. Materials and Workmanship: The babbitt metal material shall conform to ASTM Designation B-23, Grade 2 for all guide bearings. Workmanship shall conform to the requirements noted on the drawing. TESTING REQUIREMENTS All bearings shall be examined by Ultrasonic (UT) and Liquid Penetrant (PT) testing methods in accordance with Spec. 01-11, section 05090, and as specified herein. Perimeter and Holes: Zone defined as bond surface area within 1" from any edge or hole having an exposed bond line. The maximum dimension of any individual unbonded area shall be less than ?", with acceptable unbonded areas located no closer than 2" apart. The total unbonded area shall be no larger than 5% of the total zonal area. Corners: Zone defined as bond surface area within 1" from any corner having an exposed bond line. Corners shall have no unbonded areas. Dovetails: Zone defined as entire surface area over a dovetail. Dovetails are exempt from UT examination. Bond Lines: Defined as exposed lines at the babbitt to base metal interface. PT indications of lack of bond totaling over 10% of the length of a particular edge shall be unacceptable. Unbonded areas extending more than 1/8" away from an edge shall be unacceptable. Remainder of Shell or Pad: Zone defined as bond surface area other than perimeters, holes, corners and dovetails. The maximum area for any individual unbonded area shall be less than one square inch or 3% of the total zonal area, whichever is less. Acceptable unbonded areas shall be located no closer than 2" apart. The total unbonded area shall be no larger than 5% of the total zonal area. BABBITT REMOVAL AND CLEANING The contractor shall remove all old babbitt from each section of the bearing shell by means of machining and/or controlled heating procedures, cleaning the bearing shell thoroughly for tinning and application of new babbitt. Care shall be taken to minimize thermal distortion of the bearing shell. TINNING After thorough removal of the old babbitt, the entire bonding surface for the babbitt must be re-tinned. Cast iron bearing shell must be tinned with nickel. Stop-off shall be applied to areas not to be tinned to prevent tinning compound from sticking. REBABBITTING The new babbitt is to be centrifugally cast on the bearing shell and shall be done as one continuous pour. The contractor shall temporarily plug oil passageways and temperature wells which are subject to babbitt infiltration prior to casting. Bearing shall be centrifugally cast in a continuous pour. MACHINING Machining shall be completed in two phases. Following re-babbitt, the bearing bore shall be machined to uniform diameter suitable for ultrasonic inspection. After the inspection confirms that the babbitt bond meets the requirements stipulated in this specification, split-line bolts shall be installed and properly torqued to drawing specifications and the bearing shall be machined to final dimensions shown on the drawing and subject to the following: Bore finish of babbitt shall be 32 rms or better. Machining of oil grooving and thermometer bulb holes is required as detailed on the drawing. Fractional tolerances are ? 1/64 inch. The bore shall be perpendicular to the radial mounting flange within 0.002 inch over the entire length. The bore shall be concentric to the shells outer load bearing lands within 0.002 inch. INSPECTIONS a. After machining to a uniform bore diameter, the contractor shall inspect the entire surface of the bearing for bonding to the cast iron shell using pulsed reflection ultrasonic inspection techniques in accordance with ASTM E114 (2001) - Standard Practice for Ultrasonic Pulse-Echo Straight-Beam Examination by the Contact Method, and ASTM E165 (2002) - Liquid Penetrant Inspection Method. The inspector must be certified as ASNT-TC-1A, Level II, Rev 96 (2000). The total area of un-bonded babbitt is not permitted to exceed ten (10) percent of the total babbitted surface, and no single un-bonded area is permitted to exceed a dimension of one (1) square inch. Lack of bond at any exposed bond line(s) is unacceptable. Less bond than specified above shall require rebabbitting. The babbitt shall show no evidence of porosity by visual or ultrasonic inspection. A detailed, scaled drawing showing mapped bonding test results shall be submitted in accordance with paragraph b. After machining the bearing to final dimensions, a dimensional inspection shall be conducted to verify that tolerances were held. Final dimensional readings should be taken at 0?, 45?, 90?, and 135?, top, bottom and middle of the bearing. Final machining results shall be recorded and signed by a certified journeyman machinist or quality inspector and submitted per paragraph 1.3 (Submittal Requirements) and Table 1A (List of Submittals). DRAWINGS* The bearing drawings will be provided in the Request for Quote. They are original design drawings for the bearings. Completed bearing dimensions shall conform with the requirements of the Statement of Work paragraphs and the drawing. Drawing # Title Company T-9366188 Bearing 40"X15" General Electric T- 9366202 Bearing 48"X18" General Electric The requirement is being procured under Simplified Acquisition Procedures (SAP) and is set-aside for small business. The North American Industry Classification Systems (NAICS) code is 811310. The size standard is $6.5 million dollars (average gross receipts over a three-year period). Large businesses are encouraged to respond in the event that no responsive small businesses submit reasonable priced quotes. First priority for award will be to small businesses. It is anticipated that a Request for Quote (RFQ) will be issued on or about September 11, 2006, and awarded on or about September 19, 2006; however, all dates in this announcement are subject to change. The RFQ will be issued via www.fedbizopps.gov. A Request for Quote is being issued to facilitate submittal of quotes through electronic commerce, and to view all applicable clauses, attachments, and drawings. Vendors are reminded that they must be registered in the Central Contractor Registration to be considered for award. Vendors can register at www.ccr.gov. You will need your Dun & Bradstreet number and banking information. For further information, you may contact Carmen Bernhardt at (702) 293-8601 or cbernhardt@lc.usbr.gov
 

Web Link

Please click here to view more details.
(http://ideasec.nbc.gov/j2ee/announcementdetail.jsp?serverId=BR142534&objId=158988)
 

Place of Performance

Address: Unknown

Zip Code: 89005

Country: USA
 

Record

SN01140008-W 20060913/060911221550 (fbodaily.com)
 

Source

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

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