B.08 Solicitation Amendment W9127N21Q01110001 (Thrust Bearing Coolers).pdf

W66QKZ11947556

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

a. The purpose of this amendment is to post Questions & Answ ers, revise the Technical Specif ications, and extend the offer due date. See Summary of Changes for further details.

b. No other changes are made or implied.

1. CONTRACT ID CODE PAGE OF PAGES

J 1 5

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 10-Sep-2021

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street, County, State and Zip Code) X W9127N21Q0111

X 9B. DATED (SEE ITEM 11)

26-Aug-2021

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

10-Sep-2021

CODE

USACE, PORTLAND DISTRICT

333 SW 1ST AVE

PORTLAND OR 97204

W9127N 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE

See Item 6

FACILITY CODECODE

EMAIL:TEL:

W9127N21Q0111

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - BLOCK 14 CONTINUATION PAGE

The following have been added by full text:

QUESTIONS & ANSWERS (Q&A)

Questions & Answers (Q&A) Bonneville Thrust Bearing Coolers

A. As referenced on the solicitation drawing W57780070645_R3, are the Component List and Final Assy drawings available (Dwg Nos 3237114 and 4110817 respectively)?

No, those drawings are not available.

B. Questions regarding Paragraph 05. Specifications:

1. Tube joints shall be rolled and brazed.

1.1. The “SPLIT” plates can have rolled tube joint connections but the Headers are not through holes so they cannot be rolled, only brazed. Can the rolling requirement for the steel pipe be eliminated, leaving brazing as the sole mechanical retention method?

Rolling requirement for the header is not required. Tube joints shall be rolled and brazed per the specification.

1.2. Lubricant must be used when rolling tubes. Traces of the lubricant will migrate into the tube joints and would contaminate any subsequent brazing. Can the rolling requirement be eliminated from the “SPLIT” plates?

The rolling requirement is only for the tube joints.

1.3. Brazing 90/10 CuNi tubes to carbon steel can be susceptible to galvanic corrosion. The exterior steel surfaces are protected from corrosion with the Glyptal 1202 paint. Are there any requirements for tube joint corrosion protection?

No.

2. All carbon steel surfaces coated with Glyptal 1202.

2.1. Can Glyptal 1201 (Red) Insulating Coating be used instead of the Glyptal 1202 (Clear) Insulating Varnish? Both have excellent oil resistance; Glyptal 1201 is used in the bearing coolers for Hoover Dam.

Glyptal 1202 shall be used.

3. The headers shall be constructed of 2” Schedule 40 carbon steel pipe, ASTM A106 Grade B.

3.1. The available wall thickness for brazing the tubes to the headers for 2” schedule 40 pipe is .154”.

Schedule 80 pipe offers a .218” wall thickness, for more support. The flow area for schedule 80 pipe is still more than the combined 11 tubes. Can schedule 80 pipe be substituted for the headers?

Schedule 80 pipe is acceptable as long as all dimensions line up with drawing in construction of header.

4. Fins shall be 1.5” OD x 0.049” nominal thickness, aluminum 1100 fin, 9 fins per inch.

4.1. Normal 1100 aluminum fins are .020”-.030” thick to allow for forming, is the specified .049” fin thickness correct or should it be thinner?

Dimensions shall be revised to 1.375 “ OD and aluminum fins shall be 0.02” nominal thickness.

4.2. There is a dimensional discrepancy in the drawing (see attached). The largest fin diameter would be 1.375”, less than the specified 1.5”. Should the frame dimensions be adjusted to maintain the 1.5” fin diameter or the fin diameter be changed to 1.375” to fit the frame?

Dimensions shall be revised to 1.375 “ OD

5. Provide eight complete Thrust bearing oil coolers assemblies based on dimensions shown in Thrust Bearing

Oil Cooler, Drawing No. W57780070645_R3

5.1. The drawing shows the “Removable Baffle Cover” supplied by GE Co. Does this item need to be included in the proposal or is it already installed in the unit?

Removable Baffle is not a part of this solicitation.

C. A number of finer details that we will need for actual production. Some of the details needing clarification include:

- Split plate coupling - we are assuming each plate is scalloped and screwed together?

Heat exchanger to be manufactured per the original drawing. Contractor is free to use desired methods to replicate drawing and meet the specification. Plates shall be bolted together.

- Tube spacers/support design

See Section A-A on the drawing which details the bracket design.

SECTION SF 1449 - CONTINUATION SHEET

SOLICITATION/CONTRACT FORM

The required response date/time has changed from 10-Sep-2021 12:00 PM to 15-Sep-2021 02:00 PM.

The following have been modified:

TECHNICAL SPECIFICATIONS

Technical Specifications Thrust Bearing Coolers

Bonneville Lock & Dam, Oregon

01. General Supply eight (8) complete thrust bearing cooler assemblies. Furnish all labor, material, and equipment to fabricate complete thrust bearing coolers.

02. References

Thrust Bearing Oil Cooler, Drawing No. W57780070645_R3

03. Government Furnished Equipment (GFE) None

04. Submittals

Provide initial shop/fabrication drawings for government to verify proposed design within 30 calendar days from date of contract award.

05. Specifications

Provide eight complete Thrust bearing oil coolers assemblies based on dimensions shown in Thrust Bearing Oil Cooler, Drawing No. W57780070645_R3

Provide “first article” initial set of a thrust cooler to government test fit in a unit prior to fabrication of the remaining seven (7) units.

Each cooler assembly shall consist of one right-hand and one left-hand section that are bolstered together at the split plate referenced on Drawing No. W57780070645_R3 on the top left corner as “Split”.

The headers shall be constructed of 2” minimum Schedule 40 carbon steel pipe, ASTM A106 Grade B.

The split plates shall be carbon steel, ASTM A516 Grade 70.

Gaskets shall be 60 durometer neoprene.

Hardware shall be zinc plated carbon steel, ASTM A516

Tubes shall be 5/8” OD x 0.049 minimum wall 90/10 copper-nickel, ASTM B111.

Fins shall be 1.375” OD x 0.02” nominal thickness, aluminum 1100 fin, 9 fins per inch.

Tube joints shall be rolled and brazed.

Brackets shall be carbon steel “L” brackets with mounting holes. (10 brackets per cooler) ASTM A516

Connections shall be 2” Class 150 carbon steel ANSI flanges.

All carbon steel surfaces coated with Glyptal 1202.

All flange openings shall be covered for transit.

Cooler assemblies to be shipped in wooden skids.

06. Testing and Inspection

Preliminary inspection and hydrostatic test by USACE representative at place of manufacture will be required prior to delivery of first available complete assembly.

Contractor shall notify Government of inspection at least 14 days prior to date of inspection.

All cooler assemblies shall be hydrostatically tested at place of manufacturer by the Contractor before they are delivered. They shall be tested to 75 psi. The coolers shall hold this test pressure for 60 minutes without losing more than ½ psi. To be followed up by a testing report issued to government before arrival at Bonneville Dam Warehouse.

07. Acceptance

Final inspection and acceptance will be completed at the Bonneville Dam Warehouse, Bonneville Lock and Dam, Cascade Locks, Oregon, 97014. The project can be accessed via south entrance gate from Interstate 84. Monday through Thursday 0700 to 1630, excluding federal holidays. Prior to shipment, the contractor shall notify the Bonneville Project POC a minimum of 2 days in advance.

(End of Summary of Changes)