ED0042634 Mu2e Thermal Shield Ambient Vaporizers Procurement Spec.pdf

Technical Specification: Mu2e Thermal Shield Ambient Heat Exchanger

Document number: ED0042634

Document Approval

Signatures Required Date Approved

Originator: Terry Tope -

Checker: Jun Dong See TC

Approver: Terry Tope See TC

Revision History

Revision Date of Release Description of Change

0 4/1/2025 Initial Release.

Page left intentionally blank.

TABLE OF CONTENTS

TABLE OF CONTENTS

1. INTRODUCTION

2. SCOPE

3. ACRONYMS AND DEFINITIONS

3.1 Acronyms

3.2 Definitions

4. SCOPE OF WORK

5. DRAWINGS, CODES AND DOCUMENTS

6. MATERIALS

7. REQUIREMENTS

8. CONSTRUCTION, FABRICATION AND ASSEMBLY

9. DESIGN VERIFICATION AND APPROVALS

10. QUALITY CONTROL AND TESTS

11. SHIPPING

12. FINAL DOCUMENTATION REQUIREMENTS

13. DOCUMENTS TO BE INCLUDED IN THE PROPOSAL

1. INTRODUCTION

This specification details the technical requirements for two liquid nitrogen ambient heat exchangers (vaporizers) for Fermilab’s Mu2e experiment.

2. SCOPE

The scope of this procurement is two identical ambient heat exchangers which will be installed in a parallel switching configuration. Each heat exchanger shall be designed to handle the full flow of all operating modes. The scope does not include valving for switching between the heat exchangers.

The purpose of this document is to provide the technical requirement specifications to aid the design and fabrication of the ambient heat exchanger.

3. ACRONYMS AND DEFINITIONS

3.1 Acronyms

MAWP – Maximum Allowable Working Pressure

QAP – Quality Assurance Plan

WPQ – Welder Performance Qualification

WPS – Weld Procedure Specification

3.2 Definitions

In this specification the two Mu2e Ambient Heat Exchangers shall be referred to as the

DEVICE, the fabricator of the equipment shall be referred to as the SELLER and Fermi

National Accelerator Laboratory shall be referred to as the BUYER.

The latest edition of the ASME B31.3 Process Piping Code shall be referred to as the

CODE.

4. SCOPE OF WORK

The BUYER shall provide the design, fabrication, testing, packing and shipping of two ambient heat exchangers (the DEVICE) in strict accordance with this specification.

Each ambient heat exchanger shall be designed to meet the flow requirements outlined in Table 7.4.2. The BUYER will install valving to switch between the heat exchangers as necessary due to ice loading.

The SELLER shall provide documentation as specified in Section 12 of this specification.

5. DRAWINGS, CODES AND DOCUMENTS

The following list of codes, drawings and standards are to be applied to the fabrication, assembly, and testing of the DEVICE:

• DEVICE layout provided within this specification

• ASME/ANSI Process Piping, B31.3 latest edition

• ASME Y14.5M-1994 Dimensioning Tolerance Code or other equivalent standards

If contradictions in this specification or related documents and/or valid governing codes are uncovered, the BUYER shall be informed, and the problem is to be resolved in writing.

6. MATERIALS

6.1. Material Properties

6.1.1 All materials and components used in the construction of the DEVICE shall be new and suitable for the use for which they are intended.

6.1.2 Materials known to become brittle at cryogenic temperature shall not be used for components that may become cold during normal or accidental conditions.

6.1.3 All materials used in pressure containing piping components of the DEVICE shall conform to the required pressure piping code material requirements for appropriate fluid service category and operating temperature range.

6.1.4 All fittings, bends, miters, laps, branch connections, flanges, and blanks of the

DEVICE shall conform to ASME/ANSI B31.3 requirements for appropriate fluid service category.

7. REQUIREMENTS

7.1. General

This Technical Specification defines performance requirements of the DEVICE.

7.2. Environmental Conditions

The DEVICE will be installed outdoors at the FNAL site, Batavia, Illinois which is located within United States zip code 60510.

Table 7.2.1. Site ambient conditions for the DEVICE

Maximum Elevation 750 feet above sea level

Ambient Temperature, F (Min/Max) -30 / 120

Atmospheric Pressure, psia 14.3

Relative Humidity, % (Min/Max) 50/100

7.3. Design Pressure and Temperature

The DEVICE design pressure is 150 psig.

The design pressure and design temperature are presented in the Table 7.3.1.

Table 7.3.1. Design pressure and temperature for the DEVICE

Design Pressure

Minimum

(psig)

Design Temperatures

Minimum/Maximum (F)

Heat Exchanger 150 -320 / 120

7.4. Operational Parameters and Margin

The process fluid is liquid nitrogen. The DEVICE operating process conditions are presented in Table 7.4.2. The vaporizers will be in continuous operation 24 hrs per day 365 days per year. For periods of 1 hr per month a high flow condition is possible. For this 1 hr per month case the pressure drop requirement is critical.

Table 7.4.2 Operating process data for the DEVICE

Mode 24/7 365 operation 1 hr/month high flow

Mass flowrate, g/s 25 186

Mass flowrate, SCFH 2,686 20,000

Inlet pressure, psig 10 25

Inlet temperature, F -312 -306

Outlet Temperature, F Ambient temperature - 20 Ambient temperature - 20

Allowable pressure drop, psid

< 1 < 20

7.5. Wind and seismic requirements

The DEVICE shall withstand 100 mph winds and Zone 4 seismic forces.

7.6. Leak Tightness

The DEVICE shall be checked for leak tightness during the CODE required pressure test. Any leak found by soap bubble technique or pressure rate of fall during test shall be repaired.

7.7. Maximum footprint

The DEVICE shall be installed outdoor on a designated foundation area. This foundation is designed for two heat exchangers. The maximum allowable footprint of each heat exchanger frame is 50 inches by 80 inches. Piping flange connections may extend beyond the frame footprint. The maximum overall height is 252 inches.

7.8. Interface

The DEVICE inlet: ASME B16.5 150# ANSI RF flange.

The DEVICE outlet: ASME B16.5 150# ANSI RF flange

7.9. Standard Product Requirement

The DEVICE offered must be part of the SELLER’S standard product line and have been previously manufactured such that the DEVICE proposed has a previous successful operational history.

8. CONSTRUCTION, FABRICATION AND ASSEMBLY

8.1. Welding

8.1.1 All weld joint preparation and welding techniques shall be done in accordance with Chapter V of the ASME/ANSI B31.3 code.

8.1.2 The SELLER shall conduct the tests required to qualify the Welding Procedure

Specification (WPS) as required by Chapter V of the ASME/ANSI B31.3.

8.1.3 The SELLER shall conduct the tests required to qualify welders as required by

Chapter V ASME/ANSI B31.3 code.

8.1.4 All welding shall be done by the Gas Tungsten Arc Weld (GTAW) process, using welding quality argon gas for the inert shield.

8.1.5 All welds shall be internally purged with welding quality argon gas during welding and post welding treatment.

8.1.6 Welds that show evidence of a lack of purge will be deemed unacceptable.

8.1.7 All welding shall be done in such a manner that the weld surface is smooth and free of irregularities. No visible metal chips or foreign material may be detectable inside any component of the DEVICE. All external surfaces in the weld area shall be cleaned of heat tint, slag, and other deposits. No mechanical process shall be used to achieve a smooth appearance.

8.1.8 No production work shall be done until both the WPS and welders or welding operators have been qualified in accordance with the Chapter V ANSI ASME

B31.3.

8.2. Cleaning

8.2.1 Each component and subassembly shall be thoroughly cleaned at every stage of all scale, spatter, flux, foreign materials, etc.

8.2.2 Cleaning agents shall be suitable for the materials of construction and shall be neutralized if necessary.

8.2.3 Weld spatter shall be removed by wire brushing using stainless steel brushes.

8.2.4 Before shipping, the assembly shall be cleaned to provide an inner surface of all pipes and tubes free of grease, flux, moisture, dirt, and other foreign materials.

9. DESIGN VERIFICATION AND APPROVALS

9.1. Mandatory Design Approval

The following items are subject to written approval by the BUYER within thirty

(30) business days of receipt and prior to the onset of the DEVICE fabrication:

9.1.1. Major assembly fabrication drawings of the DEVICE.

9.1.2. Shipping fixtures and packaging of the DEVICE for shipment to BUYER’S site.

9.1.3. Procedure Qualification Record prior to any welding being done on the

DEVICE or its subassemblies.

9.1.4. Welder’s Qualification Records prior to any welding being done on the

DEVICE or its subassemblies.

9.1.5. WPS, prior to any welding being done on the DEVICE or its subassemblies.

9.1.6. Quality Assurance Plan (QAP).

9.1.7. Leak test procedures.

10. QUALITY CONTROL AND TESTS

10.1. Quality Assurance

10.1.1. The DEVICE is to be designed and manufactured in accordance with generally applied quality standards and techniques.

The SELLER shall prepare and implement the QAP covering design, procurement, fabrication, testing and inspection of the DEVICE and its subassemblies.

10.2. Inspection, Examination and Tests

10.2.1. The SELLER shall conduct all tests, inspections and examinations required by design and/or construction CODEs that are listed in Section 5 of this specification.

10.2.2. The SELLER shall perform all examinations required by the ASME/ANSI

B31.3 Process Piping CODE, including materials tests and non-destructive examinations.

10.2.3. The SELLER shall conduct leak tests of the DEVICE, or its subassemblies as deemed necessary to assure leak tightness. No leaks should be detected by soap bubble method during the leak testing.

10.2.4. All leak tests should be made in accordance with written procedure prepared by SELLER. The procedures must include, but not limited to, the following:

• Description of the sub-assembly or component;

• Test equipment specification;

• Name and qualification of the person(s) performing the test.

10.2.5. Any test failure which is correctable by simple rewelding or rebrazing may be undertaken without further direct contact with the BUYER. Any unacceptable leaks which are repaired shall be fully documented and described by written notice to the BUYER upon delivery of the DEVICE.

10.2.6. The SELLER shall perform pressure tests required by design and/or construction codes that are listed in the Section 5.

10.2.7. All piping circuits shall be pneumatically pressure tested with dry inert gas in accordance with paragraph 345.5 of the ASME/ANSI B31.3 Process

Piping code.

10.3. Acceptance Tests

10.3.1. Within 24 weeks of receipt of the DEVICE, the BUYER or his designated tester shall conduct leak tests at the BUYER’S site. Leaks detectable by the soap bubble method shall be defined as a failure of the equipment to pass the test.

10.3.2. Within 24 weeks of receipt of the DEVICE, the BUYER or his designated tester shall conduct pressure tests at the BUYER’s site. A leak detected at any pressure level reading during the tests or visible deformation of any tested component shall be defined as a failure of the equipment to pass the test.

11. SHIPPING

11.1. The DEVICE shall be packed and shipped appropriately to avoid any damage during transit to the BUYER.

11.2. All openings shall be sealed against the penetration of moisture, dirt or air with appropriate plastic caps or blind flanges. The DEVICE shall be shipped pressurized with 5 psig dry nitrogen gas.

11.3. All items shall be crated or boxed as to be readily handled with a fork-lift truck or shall have suitable lifting attachments to be lifted and rotated from shipping position to vertical final position with a crane.

11.4. Crate shall be clearly marked indicating the items of content, the contract number, and the gross weight.

11.5. Packaging for objects weighing over 200 lbs must have the weight and location of the center of gravity clearly identified.

12. FINAL DOCUMENTATION REQUIREMENTS

12.1. The SELLER shall provide copies of mill certification reports for all materials and/or ASME/ANSI B31.3 listed components supplied by the SELLER. For commercial items such as weld rods, electrodes, and fasteners, certificates of compliance shall be supplied in lieu of mill certification reports.

12.2. The SELLER shall furnish copies of the WPS utilized in welding operations on the DEVICE.

12.3. The SELLER shall furnish copies of the WPQ and PQR for each welder utilized in welding operations on the DEVICE.

12.4. The SELLER shall furnish all engineering and design information for the lifting lugs on the DEVICE.

12.5. The SELLER shall furnish a B31.3 compliance certificate for all process piping circuits as well as design calculations for all B31.3 process piping components to verify all component pressure ratings are at or below the circuit design pressures.

12.6. The SELLER shall furnish quality control reports, including but not limited to leak check and pressure test reports with name and qualification of the person(s) performing tests.

12.7. The SELLER shall furnish documents in the English language.

12.8. All drawings shall be supplied in Data Exchange Format (DXF). Any electronically generated documents shall be supplied in MS Office format.

Documents with handwritten entries shall be submitted in the Portable

Document Format (PDF) format.

13. DOCUMENTS TO BE INCLUDED IN THE PROPOSAL

The following items are required to be included in the proposal:

A. Total cost to furnish all facilities, equipment, special tooling, consumables, and material, except where explicitly excluded in this specification, and cost to perform all work and services necessary to engineer, design, fabricate, assemble, test and deliver to the BUYER’S site a fully functional DEVICE consisting of two vaporizers.

B. Physical dimensions and weight of the DEVICE.

C. Calculated heat transfer capacity and required heat transfer area including assumptions used in the calculation. Specify assumed ambient temperature for each heat transfer calculation.

D. Estimated switching interval between the two vaporizers.

E. Hydraulic characteristics of the proposed system including internal diameter of inlet and outlet manifolds. For each parallel piping circuit state: number of parallel circuits, single circuit length, internal diameter of each circuit.

F. Provide ice carrying capacity, stating the maximum mass of ice that the

DEVICE is designed to bear as a load at the end of a vaporizer duty cycle.

G. Materials to be used in the fabrication of the DEVICE.

H. Example leak check procedure.

I. A complete list of deliverables.

J. Proposed delivery schedule.

K. Provide a list of the SELLER'S CODE certification marks and other CODE-based qualifications or certifications that will be applicable to the design, fabrication, inspection, examination, and/or testing of the DEVICE

L. List of exceptions to this specification and reasoning for exception.