Attachment A- Spec Sheet.docx

FNAL – PAB Vacuum Jacketed Flex Hose Technical Requirements Specification Date: 06/13/2025

Fermilab Flexible Vacuum Jacketed Hose

Several vacuum jacketed flex hoses are required for a new project at Fermi National Accelerator Laboratory. These hoses will be used to transfer liquid nitrogen to an experimental fixture. Details and design requirements are contained in this document.

Table of Contents

OVERVIEW, RESPONSIBILITIES AND GENERAL TERMS

1.1 OVERVIEW

Fermi National Accelerator Laboratory, USA (FNAL) is requesting bids for the fabrication of vacuum jacketed flexible hoses. The scope of this document includes technical specifications for these components.

This Technical Requirements Specification (TRS) lists requirements for design, fabrication, testing, and shipping of the vacuum jacketed flexible hoses. It is intended to provide enough information for the design of the hose and associated components.

The FABRICATOR shall furnish all labor, equipment and materials unless otherwise noted and shall perform all work necessary to design, fabricate, assemble, test and deliver the flexible hoses to FNAL in Batavia, IL, in accordance with this specification. Any conflicts between the requirements of this specification and those of any referenced drawings, specifications, or codes shall be brought to the attention of the buyer for resolution.

1.2 GENERAL TERMS

· In the event of incompleteness or error in supplied drawings, or request for more information, the FABRICATOR shall notify the FERMILAB to obtain design directives.

· The full list of codes and standards to be applied to the design, fabrication, assembly, and testing of the vacuum jacketed flex hoses are shown in section 7. The main governing codes are:

· ASME/ANSI Process Piping, B31.3 latest edition (PIPING CODE)

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

· English units should be used for all communications between FABRICATOR and FNAL.

ACRONYMS AND DEFINITIONS

TECHNICAL ACRONYMS

· DN – Diametre Nominal, the metric equivalent of Nominal Pipe Size

· MAWP – Maximum Allowable Working Pressure

· NPS – Nominal Pipe Size

· VCR- Vacuum Compression Ring

· WPS – Welding Procedure Specification (required by ASME)

DEFINITIONS

· May - is a term which indicates that a provision is neither required nor prohibited.

· Shall - is a term which indicates that a provision is a requirement.

· Should - is a term which indicates that a provision is recommended as good practice but is not a requirement.

· Preferred – a component is preferred if has extensive and successful usage at FNAL. FABRICATOR may select other manufacturers or model numbers for components, but non-preferred components will be more closely examined before approval.

DRAWINGS AND FILE FORMATTING

· All documents shall be supplied in the English language.

· All additional drawings that may be created by FABRICATOR shall be submitted in dwg. format.

· Any other documents which are not available in the electronic forms shall be scanned or converted and submitted as PDF documents.

DESIGN REQUIREMENTS

1) Vacuum jacketed flex hose 10’ in length

The 10’ vacuum jacketed hose shall have 1/2” female VCR connections on both ends. It shall be suitable for liquid nitrogen temperatures (77 K).

Quantity: 1 (one) unit that meets the following criteria:

a) Fluid: Liquid nitrogen service

b) Temperature range: 77 K – 340 K

c) Material: 321 SST Hose & 304 SST Braid and 316 SST Fittings

d) MAWP: 500 psig

e) Length: 10 feet

f) Dynamic bend radius: ~ 9 ”

g) Static bend radius: ~ 3”

h) Heat Leak: ~ 1 BTU/hr/ft

i) Spool: ½ ” NPS

j) Flex section: ½ ” NPS ¾ ” ID

k) End fittings: 316 SST VCR Face Seal Fitting, ½ in. Female Nut, socket weld Gland, ½ in. VCR x 1 in. tube socket

l) Jacket ID: 1 ¼ ”

m) Pressure test: 110% of MAWP

n) Leak test: Helium leak tested, with a no-leak indication, to 1 x 10-9 std. cc/sec

o) Flow rate: 6.3 gpm

p) Inspection: 5% X-Ray of all inner line butt welds

q) Warranty: 1 year from shipment

r) Labeling: Laser etched part numbers and MAWP

s) Vacuum relief: integrated safety relief ports

WELDING AND BRAZING

WELDING QUALITY

· All welding shall be by argon shield, fusion arc weld process. All welds shall be internally purged with 100% argon during the time of welding and post weld treatment.

· FABRICATOR shall submit a welding quality management plan for any welding. That shall include welding qualifications, and results of all welding and brazing inspections and examinations (i.e. Radiography Tests, Ultrasonic Tests, Charpy Impact Tests, etc.).

· FABRICATOR shall qualify the welding procedure specification (WPS) and welders in accordance with the Section VIII paragraphs UW-28 and UW-29 and Section IX of the ASME BPVC Section VIII or Chapter V of ASME B31.3 before beginning of production work.

· 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 of any component. 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 the smooth appearance externally, however the internal surfaces shall be electroplated or electropolished after welding has been completed.

· No liquid penetrant or magnetic particle testing shall be used on any weld on the internal cryogenic temperature components.

· All welds shall be internally purged with welding quality argon gas during the time of welding and post welding treatment.

FABRICATION AND ASSEMBLY REQUIREMENTS

GENERAL REQUIREMENTS

· FABRICATOR shall provide mill certification reports and/or material testing reports for all materials supplied by FABRICATOR. The reports shall include both physical and chemical properties of the materials. For commercial items such as weld rods, electrodes, and fasteners, certificates of compliance shall be supplied in lieu of mill certification reports.

· FABRICATOR shall provide list of materials or components to be used for the fabrication.

CLEANING

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

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

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

· Each assembly shall be cleaned to provide an inner surface of all pipes and tubes free of grease, flux, moisture, dirt, and other foreign materials by vapor degreasing or suitable wash. Surfaces shall be visibly inspected and wiped down with a white cloth. In order to be considered free of contamination, no discoloration shall appear on the white cloth.

· After cleaning, each section shall be blown dry with clean dry air until no moisture remains.

JOINTS, FLANGES, BLANKS, and GASKETS

· All permanent joints shall be welded.

LEAK CHECKING AND PRESSURE TESTING

· FABRICATOR shall leak check and additionally pressure test.

· FABRICATOR shall provide leak check and pressure test reports.

LEAK CHECKING REQUIREMENTS

· An integral leak rate is determined by pressurizing the internal components and evacuating.

· A typical leak checking procedure includes the following:

· The leak test reports must include, but are not limited to, the following:

PRESSURE TESTING

· Pressure testing shall be per ASME BPVC Section VIII, Div.1. FNAL prefers that the vacuum jacketed hoses are not subjected to water and therefore should be tested pneumatically with dry inert gas in accordance with paragraphs UG-100 and UW-50 of the Division I, Section VIII of the ASME BPVC latest edition.

· Pressure test reports shall be prepared for each pressure test performed. The report shall list the following:

· Test Date

· Person(s) performing the test,

· Description of the component(s) being tested,

· Test pressure,

· Time held at final test pressure (minimum 5 minutes),

· Presence of any observed leaks, i.e. any detectable decrease in the pressure during the course of the pressure test

· Any additional observations from the person(s) performing the test.

· Any test failure which is correctable by simple re-welding. Any unacceptable leaks which are repaired shall be fully documented and described in an attachment to the pressure test report

LIST OF STANDARDS

The codes and standards listed below, in their latest edition, shall be applied to the engineering, design, fabrication, assembly and tests:

· ASME/ANSI B31.3 Process Piping

· ASME Boiler and Pressure Vessel Code (BPVC)

· ASTM A380 Cleaning and De-scaling Stainless Steel Parts

· Fermilab Environment, Safety and Health (ES&H) Manual

SHIPPING REQUIREMENTS

SHIPPING PLAN

· Shipment plan shall be approved before the vacuum jacketed flex hoses are shipped. The shipping plan shall include:

- The approximate weight of the assembly to be shipped.

SHIPPING METHODS

· The vacuum jacketed flex hoses shall be shipped by truck or air.

CONTAMINATION PROTECTION

· All openings shall be sealed against the penetration of moisture, dirt or air.

RESTRAINT AND PACKAGING

· Vacuum jacketed hoses shall be shipped in position that induces the least forces on the assembly.

DOCUMENTATION REQUIRED WITH DELIVERY

· Certificate of Conformance

· Material Certification Test Reports

· Weld Procedures

· Welder Qualification Records

· Weld Filler Metal Documentation

· All Code Required Radiography Reports

· All Engineering Calculations and Design Information

· Documented Results of all Testing

DOCUMENTATION REQUIRED BEFORE APPROVAL OF FABRICATION

· Fabrication Drawing(s)

· Calculations required per ASME BPVC Section VIII

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