FA9101-17-R-0075_0001.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

See Block #2

PAGE OF PAGES

2. AMENDMENT/MODIFICATION NO.

3. EFFECTIVE DATE

31 AUG 2017

4. REQUISITION/PURCHASE REQ.NO.

5. PROJECT NO. (If applicable)

6. ISSUED BY AEDC/PZI ARNOLD CODE FA9101 7. ADMINISTERED BY (If other than Item 6) CODE

AFTC/PZI (ARNOLD)

100 KINDEL DRIVE, SUITE A-332

ARNOLD AFB, TN 37389-1332

MIRIAM A. JAMES 931-454-4406

miriam.james@us.af.mil

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) (X) 9A. AMENDMENT OF SOLICITATION NO.

FA9101-17-R-0075

X

9B. DATED (SEE ITEM 11)

14 AUG 2017

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

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 Offers is extended, X is not extended.

Offers 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 MODIFICATION OF CONTRACTS/ORDERS,

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

(X )

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: ( ) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NO. ITEM

10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, 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.)

The purpose of this amendment is to provide answers to questions submitted to the Government.

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).

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

MIRIAM A. JAMES

15B. CONTRACTOR/OFFEROR

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

16C. DATE SIGNED

(Signature of person authorized to sign)

BY________________________________________

(Signature of Contracting Officer)

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV.10-83)

PREVIOUS EDITION UNUSABLE Prescribed by GSA ConWrite Version 6.15.2 FAR (48 CFR) 53.243 Created 31 Aug 2017 8:51 AM

SCHEDULE OF CHANGES

FA9101-17-R-0075 0001

1. Refer to section 3.1.1.B. Please confirm that the intent is to operate all 4 exchangers in parallel for the alternate case and only two exchangers in parallel for the primary design conditions.

Answer:

It should be noted that in accordance with section 3.2.3.A, the number of heat exchangers in each bank is at the discretion of the Contractor. The representation of two heat exchangers in each bank was for illustration purposes only. However, their understanding of the concept of operations is correct. Only one bank, in parallel, is intended to be used for the primary design condition, and the second bank is used to achieve the alternate conditions.

2. Appendix A note 2 states that we can exceed the cooling water flow with prior

Government approval. We would like to know if we can use up to 130% of the flow (if needed) noted for the "strained lake water/drain".

A nominal flow of 14,000 GPM is acceptable for the cooling water.

3. On Appendix A the Process Fluid maximum pressure shows 500 psig with a maximum of

700 psig. We ask - is the maximum pressure the design pressure for the vessel or are these operating conditions? If the 700 psig is the design pressure for a stainless steel shell that will result in a thick shell. If these pressures are lower that would make a difference.

The current operating pressure is 500 PSIG; however, the system is designed to allow a future operating pressure up to 700 PSIG. The process side, whether the shell side or the tube side, must be rated for 700 PSIG. If properly relieved, the cooling water side will only have to be rated for 150 PSIG.

4. On Appendix A and in section 3.1.1. A, the service conditions state "intermittent". We would like to understand how the systems operates in case we need to consider how this might impact the design.

The system will be operated on an irregular schedule, typically only operating a few times a week for an hour or two at a time. When not in operation, the system will still be full of water on both the process and cooling sides, but there will be no flow or heat transfer.

5. Refer to section 3.2.2.B. What happens if the total weight exceeds 300,000 LBS.

The concrete foundation is only designed for 300,000 lbs per bank.

6. For the Primary conditions only, is there any way to increase the lake water flow to

14,000 GPM in order to cool the demineralized water from 190 F to 105 F?

7. What is the max no. of exchangers that will go into the bank

In accordance with section 3.2.3.A, the number of heat exchangers is at the discretion of the Contractor; however, all units must fit entirely within the space constraints provided per section 3.2.3.C.

8. (3.2.4) 20 plugs in spare, which type of plug pop-a-plug or welded, any preference of one over another.

We have no preference as to the style of plug.

9. (3.7.1 L) MSDS -MSDS for the fluids that will run into the exchanger, please provide

MSDS for review.

Answer:

The Contractor is not responsible for providing an MSDS for the process or cooling fluids. They are only required to provide an MSDS for items they supply, such as additional lubricants, sealants, or other chemicals provided with the units. I have never produced or used an MSDS for water, so if the Contractor would still like an MSDS for review we can produce one. We do currently have a nominal contamination composition of the cooling water if that would be an acceptable replacement.

10. Are tube ends welded or just roller expanded with 2 grooves?

The tube end connection method was not specified and is left to the Contractor's discretion. Any method compliant with the ASME Boiler and Pressure Vessel Code and the TEMA Standard is permitted.

11. For welded tube ends, is there is helium leak test requirement?

Only tests specifically required by the ASME Boiler and Pressure Vessel Code and the

TEMA Standard are specified. There are no additional or optional tests required.

12. Is there is N2 purging requirement?

Nitrogen purging is only needed when required by the ASME Boiler and Pressure Vessel

Code, such as when welding stainless steel.

13. Tubes are welded spec or seamless specification?

The tube specification was not specified and is left to the Contractor's discretion. Any specification that satisfies the ASME Boiler and Pressure Vessel Code and the TEMA

Standard is permitted.

14. Why max particle size mentioned, do we have to use larger tubes or is there a min tube diameter requirement such as 1" or so?

Answer:

The maximum particle size is included to assist the Contractor in selecting a minimum tube size and evaluate potential clogging.

15. What is the inlet pressure on both sides?

The nominal pressures listed in APPENDIX A are the inlet pressures on both the process and the cooling side and should be used for all flow calculations.

16. What corrosion allowance to be used on shell & tube side?

The manufacturer's standard corrosion allowance is acceptable; however, note that if a carbon steel shell is used they are also required to provide a sacrificial anode to account for galvanic corrosion.

17. Fouling resistance will be per TEMA as given in the spec.?

Fouling resistance per the TEMA Standard is all that is required.

18. Are there any paint specifications to be followed?

Section 3.1.2 requires that all exposed carbon steel or iron surfaces be painted per the manufacturer's standard practice for outdoor service.

19. Refer Appendix A Heat Exchanger Data Sheet for Rated Performance. Please check

Total Cooling Flow in GPM given: 9000. Required: 14085.

20. Can the Contractor accept the first two prepayments?

Contractors may propose a payment schedule. However, offerors should give head to note the progress schedule listed in CLIN 0001 and FAR 52.232-01.

21. Will the Contractor be paid the remaining balance within 45 days of date of delivery?

Answer:

Refer to 3.6, Acceptance: The Government will accept the heat exchangers after installation and operational checkout that demonstrates the units meet physical and performance requirements. Acceptance shall be within 180 days of delivery to Arnold Air

Force Base, TN."