K0000190544_TSMU_LO2_VJ_Pipe_Procurement_SpeC.pdf

KSC FORM 21-2C NS (REV 06/04) PREVIOUS EDITIONS ARE OBSOLETE

TSMU PIPE SPECIFICATION, VACUUM

JACKETED, LO2 SERVICE

K0000190544-SPC

C.T. OCONNOR

C.E.EXLINE

T.O. ADAMS

A.C. LITTLEFIELD

L.C. KAYLOR

V.J. WARD

D.J. ROTH

None —

22264 -

03/02/2015

EAR 99 -- NO LICENSE REQUIRED

The information contained in the document is technical in content, but not technical data as defined by the International Traffic in Arms Regulations (ITAR) or the Export Administration Regulations (EAR), and therefore is EAR 99 NLR, no export license required. [General Prohibition Six (Embargo) applies to all items subject to the EAR, (i.e., items on the CCL and within EAR 99 NLR). You may not make an export or re-export contrary to the provisions of part 746 (Embargos and Other Special Controls) of the EAR and 22 CFR part 126.1 of the ITAR].

EDDR # 1313961 NASA KSC Export Control Office (321-867-9209)

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KSC FORM 21-2D NS (REV 06/04) PREVIOUS EDITIONS ARE OBSOLETE

TABLE OF CONTENTS

1. SCOPE

2. APPLICABLE DOCUMENTS

2.1 Governmental

2.2 Non-Governmental

3. REQUIREMENTS

3.1 Definition

3.2 General

3.2.1 Fluid Service

3.2.2 Temperature and Pressure

3.2.3 Material Properties

3.2.4 Heat Leak

3.2.5 Inner Pipe Assembly

3.2.6 Outer Pipe Assembly

3.2.7 VJ Joint Connections

3.2.8 Instrumentation/Auxiliary Ports

3.2.9 Weld Fittings

3.2.10 Thermal Life Cycle

3.2.11 Listed / Unlisted Components Usage

3.2.12 Attachments

3.3 Construction

3.3.1 General

3.3.2 Welder Qualification

3.3.3 Non Destructive Evaluation (NDE) Examiners

3.3.4 Non Destructive Evaluation (NDE)

3.3.5 Welding

3.3.6 Low Temperature Toughness

3.3.7 Passivation

3.3.8 Cleaning

3.3.9 Name Plates and Product Marking

3.3.10 Workmanship

3.3.11 Interchangeability

3.3.12 Safety

3.3.13 Human-Factors Engineering

3.3.14 Security

3.3.15 Government-Furnished Property

3.4 Documentation

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3.5 Logistics

3.6 Personnel and Training

3.7 Major-Component Characteristics

3.8 Precedence

3.9 Qualification

3.10 Samples

4. VERIFICATION

4.1 Responsibility for Inspection

4.2 Special Tests and Inspections

4.2.1 Pipe Spool Measurements

4.3 Verification Inspections

4.3.1 Required Testing Chronology

4.3.2 Cold Shock

4.3.3 Pressure/Leak Testing

4.3.4 Mass Spectrometer Leak Testing

4.3.5 Vacuum Retention Test

4.4 Dimensional Verification

4.4.1 Pipe Assemblies

4.5 Responsibility For Verification / Inspection

4.5.1 Verification/Inspection

5. PREPARATION FOR DELIVERY

5.1 Preservation

5.1.1 Protective pressure cap

5.1.2 Packaging Cleanliness

5.1.3 Vacuum in Annulus

5.1.4 Inner Line Pressure

5.1.5 Recordings

5.2 Packing

6. NOTES

6.1 Intended Use

Figures

Figure 1 - Concentric Serration Dimensions

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RECORD OF REVISIONS/CHANGES

REV

LTR DESCRIPTION DATE

- Initial Release March 2, 2015

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Abbreviations, acronyms, and symbols

ASME American Society of Mechanical Engineers DP Design Pressure GN2 Gaseous Nitrogen GO2 Gaseous Oxygen GSE Ground Support Equipment KSC Kennedy Space Center LO2 Liquid Oxygen LN2 Liquid Nitrogen MDP Maximum Design Pressure NASA National Aeronautics and Space Administration NDE Non-Destructive Evaluation NPS Nominal Pipe Size TSMU Tail Service Mast Umbilical VJ Vacuum Jacket WPS Weld Procedure Specification WPQ Welder/Welding Operator Procedure Qualifications

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1. SCOPE

This specification provides technical information and requirements for the design, fabrication, and testing of vacuum jacketed cryogenic piping segments used in the transfer of liquid oxygen (LO2) and liquid nitrogen (LN2).

2. APPLICABLE DOCUMENTS

The following documents form a part of this document to the extent specified herein. The latest revision applies unless a specific revision is indicated. However, when this document is used for procurement, including solicitations, or is added to an existing contract, the specific revision levels, amendments, and approval dates of said documents shall be specified in an attachment to the Solicitation/Statement of Work/Contract.

Copies of specifications, standards, drawings, and publications required by vendors in connection with specified procurement functions should be obtained from the procuring activity or as directed by the Contracting Officer.

In case of conflict between referenced document and this specification, this specification shall take precedence

2.1 Governmental

NASA/Kennedy Space Center

KSC-C-123 Surface Cleanliness of Fluid Systems, Specification For

KSC-STD-E-0015 Marking of Ground Support Equipment, Standard For

Military Specification

MIL-PRF-27407C Propellant Pressurizing Agent, Helium

MIL-PRF-27401F Propellant Pressurizing Agent, Nitrogen

MIL-PRF-25567 Leak Detection Compound, Oxygen Systems

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KSC Drawings

79K14672 Vacuum Valve Assembly

Federal

FED-STD-595 Colors Used In Government Procurement

2.2 Non-Governmental

American National Standard Institute (ANSI)

AWS D17.1/D17.1M

2010-AMD1

Specification for Fusion Welding for Aerospace Applications

The American Society of Mechanical Engineers

ASME B31.3 Process Piping

ASME B16.5 Pipe Flanges and Flanged Fittings

ASME B16.9 Factory-Made Wrought Buttwelding Fittings

ASME 16.25 Buttwelding Ends

American Society of Testing and Materials

ASTM A182 Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High Temperature Service

ASTM A193 Standard specification for alloy-steel and stainless steel bolting for high temperature or high pressure service and other special purpose applications.

https://products.ihserc.com/shoppingcart/controller?callbackurl=Javascript%3Ans4%3Ddocument.layers%3Bif(ns4)%7bparent.window.close()%3B%7delse%7bopener.focus()%3B%7d&callapp=SPECS4&event=QuoteForm&prod=SPECS4&sess=750456331&docnum=FED-STD-595&docDate=1956.03.01

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ASTM A194 Standard specification for carbon and alloy steel nuts for bolts for high pressure or high temperature service, or both

ASTM A240 Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A312 Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes

ASTM A320 Standard specification for alloy-steel and stainless steel bolting materials for low temperature service

ASTM A380 Practice for Cleaning, Descaling, and Passivation of Stainless Steel parts, Equipment, and Systems

ASTM A403 Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

ASTM A967 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts

International Organization for Standardization

ISO 14952 Space systems – Surface cleanliness of fluid systems

National Bureau of Standards

NBS Monograph 29 Thermal Expansion of Technical Solids at Low Temperatures. A Compilation from the Literature

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3. REQUIREMENTS

3.1 Definition

The assemblies are vacuum jacketed pipe used to deliver cryogenic propellant (LO2), as part of the Ground Support Equipment (GSE).

For the purpose of this document, the following definitions shall apply.

a. Annulus – Space between inner and outer piping walls

b. Calendar Day – Consecutive days on a calendar.

c. Field Monitor – Pressure monitoring performed by individual from a dial indicator gage without electronic transmission.

d. Pressure Cap – A pressure retaining cap which may be used for pressurizing pipe spool to 150% design pressure. Pressure cap may also be used as shipping cover.

e. shall: - Used to indicate a requirement which must be implemented and its implementation verified;

f. should: Used to indicate a goal which must be addressed by the design but is not formally verified;

g. Will: Used to indicate a statement of fact and is not verified.

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3.2 General

3.2.1 Fluid Service

3.2.1.1 The service shall be for Liquid Oxygen (LO2), Gaseous Oxygen (GO2), Gaseous Helium (GHe), Liquid Nitrogen (LN2) or Gaseous Nitrogen (GN2)

3.2.1.2 All pipe assembly components shall be designed and fabricated as normal fluid service in accordance with ASME B31.3.

3.2.1.3 Examination processes and Pass/Fail criteria shall be in accordance with severe cyclic service requirements in ASM E B31.3.

3.2.2 Temperature and Pressure

3.2.2.1 The lowest ambient temperature expected in service shall be +21.2 degrees F.

3.2.2.2 The nominal ambient temperature in service shall be +80 degrees F

3.2.2.3 The maximum ambient temperature in service shall be +100.4 degrees F

3.2.2.4 The assembled VJ pipe shall be designed for -321 degrees F to +158 degrees F at 315 psig. All components shall be designed for -321 degrees F to +158 degrees F at 315 psig

3.2.2.5 The Design Pressure (DP) for the inner pipe shall be 315 PSIG, with 0 psia (full vacuum) applied to external surface of inner pipe (annular space). Reference paragraph 3.2.2.4 for the design temperature range.

3.2.2.6 The outer jacket piping shall have an annular space design pressure (as defined by ASME B31.3) of 35 psig. Reference paragraph 3.2.2.4 for the design temperature range.

3.2.2.7 The outer jacket piping shall be designed for external pressure of 20 psig (above ambient) with 0 psia (full vacuum) annular space pressure. Reference paragraph 3.2.2.4 for the design temperature range.

3.2.3 Material Properties

3.2.3.1 All materials used as pressure containing components shall meet the requirements of

ASME B31.3.

3.2.3.2 Thermal properties of materials at cryogenic temperatures shall be as described from the National Bureau of Standards - Thermal Expansion of Technical Solids at Low Temperatures. A Compilation from the literature, NBS Monograph 29

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3.2.3.3 All materials for construction are specified in this specification. However, the contractor may use materials not specifically called out in this specification provided that chemical and mechanical analysis for the material are submitted to the owner for approval prior to start of fabrication. All materials including those in the vacuum annulus space shall be compatible with the fluid commodity (LO2, LN2, GN2, GHe).

3.2.4 Heat Leak

3.2.4.1 The maximum heat leak for the vacuum jacketed pipe, including spacers and materials in annular space but not end fittings, shall be determined by test or analysis. For analysis calculations the temperature shall be -321 degree F cryo conditions to a maximum ambient temperature of 100.4 degree F.

Nominal ID of Inner Line (in) Btu/hr/ft 3 0.9 8 2.0

3.2.4.2 The maximum heat leak for the bayonet end connections, including materials in annular space, shall be determined by test or analysis. For analysis calculations the temperature shall be -321 degree F cryo conditions to a maximum ambient temperature of 100.4 degree F.

Bayonet Size (in) Btu/hr 3x5 70.1 8x10 310

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3.2.5 Inner Pipe Assembly

3.2.5.1 Inner pipe shall be constructed of annealed dual grade ASTM A312 TP316/TP316L. For these dual grade steels, the design shall be based on the allowable stresses tabulated in ASME B31.3 for the standard grade. ASTM A312 TP304L or TP316L pipe shall not be used. Cold worked material shall not be acceptable. Welds must be 100% radiographed.

3.2.5.2 Inner pipe shall be NPS schedule as specified in drawing.

3.2.5.3 The inner line shall be supported with spacers that center it within the outer jacket

3.2.5.3.1 Details of the design, location and material selection of spacers shall be submitted to the owner for approval prior to fabrication.

3.2.5.3.2 Spacers for pipe diameters 4 inches or less shall withstand 3,000 lbf minimum compressive load with no performance degradation.

3.2.5.3.3 Spacers for pipe diameters 6 inches or greater shall withstand 5,000 lbf minimum compressive load with no performance degradation.

3.2.5.3.4 Spacers will be designed to minimize heat leakage using materials that will minimize off-gassing.

3.2.5.3.5 Spacer locations shall be Government Furnished Information.

3.2.5.4 The inner pipe shall be wrapped with a multi-layered insulation (MLI) system consisting of alternating layers of Aluminized Mylar or Aluminized Foil and glass fiber paper to conform to the heat leak requirements of paragraph 3.2.4 of this document

3.2.5.5 Each vacuum jacket annulus space shall be equipped with a chemical getter system consisting of a molecular sieve desiccant and hydrogen converter.

3.2.5.6 All inner pipe pressure boundary welds, as defined per ASME B31.3, shall accommodate 100% radiography

3.2.5.7 Inner pipe branch connection which cannot utilize a standard ASME 16.9 fitting or reducing tee shall be fabricated with an ASME listed Bonney Forge Vesselet style branch connection.

3.2.5.8 Pipe fittings shall be in accordance with ASME B16.9.

3.2.5.9 Inner pipe elbows shall be long radius per ASME B16.9. Mitered tee and elbows are not permitted on inner pipe

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3.2.6 Outer Pipe Assembly

3.2.6.1 Outer pipe shall be constructed of annealed dual grade ASTM A312 TP316/TP316L. For these dual grade steels, the design shall be based on the allowable stresses tabulated in ASME B31.3 for the standard grade. ASTM A312 TP304L or TP316L pipe shall not be used. Cold worked material shall not be acceptable.

3.2.6.2 Outer pipe shall be NPS schedule as specified in drawing.

3.2.6.3 All outer pipe circumferential welds shall accommodate 100% dye penetrant examination per ASME B31.3

3.2.6.4 All mitered corners shall be closely spaced geometry per ASME B31.3.

3.2.6.5 Vacuum Valve

3.2.6.5.1 Each section of vacuum jacketed pipe shall be equipped with a vacuum valve assembly in accordance with 79K14672-3

3.2.6.5.2 Vacuum pump-out valves shall be located as per shown in the pipe spool drawings and will be government furnished equipment.

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3.2.7 VJ Joint Connections

3.2.7.1 Bolt hole dimensions on flanges shall meet the requirements of ASME 16.5 for a class 150 flange of a diameter matching the jacketed pipe dimensions.

3.2.7.2 Flanges shall be constructed from dual grade ASTM A182 F316/F316L stainless steel.

3.2.7.3 All flanges shall be raised face with concentric serrations as shown in Figure 1.

Figure 1 - Concentric Serration Dimensions

3.2.7.4 Flanges shall be forged type only. Fabricated and flared type is not permitted.

3.2.7.5 Flange fastener Bolt studs, washer and nut materials shall be in accordance with ASTM A193, A194, or A320.

3.2.7.6 Socket weld joints shall not be used.

3.2.7.7 Butt welded joint designs shall meet the requirements of ASME B16.9.

3.2.7.8 Butt welded end designs shall meet the requirements of ASME B16.25

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3.2.8 Instrumentation/Auxiliary Ports

3.2.8.1 All instrumentation/auxiliary ports, including vacuum jacket terminations, shall comply to the requirements of ASME B31.3

3.2.9 Weld Fittings

3.2.9.1 Fittings shall be as per ASME B16.9 and ASTM A403 class WP-S (seamless) or WP-WX (welded with 100% x-ray) and shall be WP316/WP316L (dual graded) and shall be of schedule as specified in the drawing.

3.2.10 Thermal Life Cycle

3.2.10.1 The pipe assemblies shall have a designed thermal cycle life of a minimum of 3,000 cycles. A thermal cycle is defined as the pipe assembly starting at ambient temperature, then being taken down to minus 321 degrees F, held at that temperature for a minimum of 15 minutes, and then allowed to return to ambient temperature. A pressure cycle for the assembled VJ pipe shall be 0 psig to 315 psig and back to 0 psig. These requirements are design requirements only and do not require verification by test.

3.2.11 Listed / Unlisted Components Usage

3.2.11.1 Piping components shall be listed components in accordance with ASME B31.3. Unlisted components may be used provided they are qualified in accordance to ASME B31.3 paragraph 304.7.2 (c) or (d). Paragraph 304.7.2(e) of ASME B31.3 shall not be utilized to qualify unlisted components.

3.2.11.2 Charpy impact testing shall be required for pipe welds for listed components per ASME B31.3.

3.2.12 Attachments

3.2.12.1 All plates, rings or other items attached to the outer jacket or inner line shall be fabricated from dual grade 316/316L per ASTM 240.

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3.3 Construction

3.3.1 General

3.3.1.1 All work on vacuum jacketed lines which exposes the annular area between the inner and outer line shall be performed in a controlled environment which will minimize the exposure to moist air, oil, grease or other contaminants. A dry GN2 purge shall be maintained whenever possible, after annulus closure. The annulus area of the vacuum jacketed lines shall be maintained clean at all times. Application of tape, grease pencil, and chalk marks shall be avoided. Exposed surface areas shall be thoroughly degreased before the annulus is closed.

3.3.2 Welder Qualification

3.3.2.1 All welding shall be performed by qualified welders per weld procedure specifications for each weld in accordance with AWS D17.1, clause 9, paragraph 9.1, option 2, and ASME B31.3. Weld traceability maps of welder and procedure number at each joint are required for each pipe.

3.3.3 Non Destructive Evaluation (NDE) Examiners

3.3.3.1 Weld examiners shall be qualified in accordance with AWS D17.1, clause 9, paragraph 9.1, option 2, and ASME B31.3 paragraph 342.

3.3.4 Non Destructive Evaluation (NDE)

3.3.4.1 All welding inspections shall be performed in accordance with AWS D17.1, clause 9, paragraph 9.2, Severe Cyclic Conditions and ASME B31.3 by qualified weld examiners

3.3.4.2 Weld examination pass/fail criteria shall be per ASME B31.3, Severe Cyclic Conditions.

3.3.4.3 All welds shall be 100% examined per AWS D17.1, clause 9, paragraph 9.2, Severe Cyclic Conditions and ASME B31.3 as follows:

3.3.4.3.1 All welds shall be 100% visually examined.

3.3.4.3.2 All fillet welds shall be 100% dye penetrant inspected

3.3.4.3.3 All welds located on outer pipe jacket shall be dye penetrant examined

3.3.4.3.4 All welds located on inner pipe pressure boundary shall be 100% radiographed.

3.3.4.3.5 Dye penetrant shall be removed from the annular space in order to meet the vacuum retention requirements of this specification.

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3.3.5 Welding

3.3.5.1 All inner circumferential welds shall be full penetration welds for severe cyclic conditions in accordance with AWS D17.1, clause 9, paragraph 9.1, option 2 and ASME B31.3. Filler metal selection shall be in accordance with ASME B31.3.

3.3.5.2 Backing rings are not permitted.

3.3.5.3 Brazing and soldering are not permitted.

3.3.5.4 Attachments of ASTM A240 material shall be welded per AWS D 17.1, clause 9, paragraph 9.1, option 2, Class B inspection and ASME B31.3. Filler metal selection shall be in accordance with ASME B31.3.

3.3.5.5 Remove scale, burrs and break sharp edges.

3.3.6 Low Temperature Toughness

3.3.6.1 All welds shall meet the requirements for low temperature toughness (impact test) in accordance with ASME B31.3, paragraph 323.2.2.

3.3.7 Passivation

3.3.7.1 Welds and heat affected areas shall be passivated per ASTM A967. Passivation chemicals/fluid/materials shall be removed from the annular space in order to meet the vacuum retention requirements of this specification.

3.3.8 Cleaning

3.3.8.1 The inner surfaces of all pipe assemblies and components shall be cleaned to KSC-C- 123J level 300, ISO 14952 level 300, or vendor submitted equivalent (requires NASA approval). All cleaning processes and cleanliness level inspections shall be as specified in KSC-C-123J level 300, ISO 14952 level 300, or NASA approved equivalent.

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3.3.9 Name Plates and Product Marking

Electrochemical Etch (Type II), Engrave (Type VII), or Laser Engrave (Type VIII) using 0.125 inch minimum characters per provisions in MIL-STD-792 and the General Requirements (Paragraph 3.1) and Quality Assurance provisions (Paragraph 4) of KSC-STD-E-0015. Do not engrave or etch directly on the jacket pipe. Stainless steel name plate may be tack welded to outer line prior to testing.

At a minimum, the data indicated below shall be included:

• Manufacturing vendor’s name

• Contract Number

• KSC Part Number

• KSC Spool Number

• Design Pressure

• Test pressure

• Test date

• Service

• Year Built

• Temperature Range

• Weight

3.3.10 Workmanship

Hardware shall be fabricated and finished so appearance, fit, and adherence to specified dimensions and tolerances are observed and in a manner that ensures reliable operations in accordance with the requirements specified herein. Particular attention shall be given to the neatness and thoroughness of construction and to the freedom of parts from burrs and sharp edges that might damage associated equipment or cause injury to personnel. Any item failing the acceptance criteria shall be repaired or replaced and reexamined to the same acceptance criteria as required for the original work.

3.3.11 Interchangeability

Hardware assemblies, components, and parts with the same part number shall be physically and functionally interchangeable

3.3.12 Safety

N/A

3.3.13 Human-Factors Engineering

N/A

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3.3.14 Security

N/A

3.3.15 Government-Furnished Property

79K14672 vacuum valve assemblies

3.4 Documentation

N/A

3.5 Logistics

N/A

3.6 Personnel and Training

N/A

3.7 Major-Component Characteristics

N/A

3.8 Precedence

In case of conflict between referenced document and this specification, this specification shall take precedence.

3.9 Qualification

N/A

3.10 Samples

N/A

4. VERIFICATION

4.1 Responsibility for Inspection

Unless otherwise specified in the contract or order, the vendor shall be responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the vendor may use his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are

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4.2 Special Tests and Inspections

4.2.1 Pipe Spool Measurements

4.2.1.1 Measure and record the weight of pipe spool +/- 5 pounds.

4.2.1.2 Measure and record the length of the pipe spool under the following conditions: +1/4 / -0 inches.

4.2.1.2.1 Ambient pressure and temperature with the annulus evacuated to a pressure of 50 microns of Hg or less.

4.3 Verification Inspections

Testing commodities shall conform to specifications as follows:

• Gaseous helium to MIL-PRF-27407C, Type I, Grade A

• Gaseous nitrogen to MIL-PRF-27401F, Type I, Grade B

• Liquid nitrogen to MIL-PRF-27401F, Type II, Grade B

4.3.1 Required Testing Chronology

4.3.1.1 The testing in sections 4.3.2 to 4.3.5 shall be performed sequentially.

4.3.2 Cold Shock

4.3.2.1 The completed vacuum jacketed pipe will have the vacuum annulus evacuated to a pressure of 10 microns of HG or less.

4.3.2.2 The assembly shall be cold shocked with LN2 by tilting the line at least 15 degrees and introducing the LN2 into the assembly at the low end, allowing the boil off gas to vent from the high end. The chilldown and tilting of the assembly shall continue until a steady stream of LN2 is forced out the high end. The LN2 supply shall then be maintained to keep LN2 within 6 inches, at the farthest point, from the end of the spool, and allowing the assembly to cold-soak for 1 hour.

4.3.2.3 The vacuum readings shall be recorded before, during, and after the cold shock test. The vacuum reading after the cold-shock test shall be taken when the assembly returns to ambient temperature. Post cold shock vacuum reading shall be less than 50 microns of Hg pressure

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4.3.3 Pressure/Leak Testing

4.3.3.1 The leak pressure test shall be conducted via hydrostatic testing at a minimum of 150% of the design pressure per ASME B31.3.

4.3.3.2 The pressure shall be maintained for a minimum of 10 minutes. The vacuum readings shall be recorded prior to test and after the pressure has been reduced to DP and at end of test where pressure is less than 10 psig. The vacuum jacketed pipe undergoing test shall exhibit no leakage while undergoing leak testing and show no permanent deformation or damage as result of the leak testing.

4.3.3.3 Leak testing shall be performed at ambient temperature.

4.3.4 Mass Spectrometer Leak Testing

4.3.4.1 The vacuum jacket annulus shall be evacuated to a pressure of 10 microns of HG or less.

4.3.4.2 One of the following two testing procedures shall be used. Do not introduce helium into the vacuum annulus for any testing.

4.3.4.2.1 With inner line pressurized to MDP with 100% helium and holding at MDP for 1 minute minimum, the mass spectrometer leakage indication shall be below 10-7 std-cc/sec. To accomplish this test, a mass spectrometer capable of sensitivity to 10-9 std-cc/sec shall be used.

4.3.4.2.2 As an option with inner line pressurized to MDP with 10% helium/90% nitrogen and holding at MDP for 1 minute minimum, the mass spectrometer leakage indication shall be below 10-9 std-cc/sec. To accomplish this test, a mass spectrometer capable of sensitivity to 10-10 std-cc/sec shall be used.

4.3.4.3 The outer jacket shall be tested with all jacket welds surrounded by a 100% GHe atmosphere.

4.3.4.3.1 GHe leakage shall be less than 10-7 std-cc/sec using a Helium Mass Spectrometer Leak Detector set to a minimum sensitivity of 10-9 scc/s

4.3.5 Vacuum Retention Test

4.3.5.1 Each section of the vacuum jacketed pipe shall be evacuated to a pressure of 10 microns of Hg or less at ambient temperature.

4.3.5.2 The vacuum level in the annular space of each section of the vacuum jacket pipe shall be measured and recorded every twenty-four (24) hours for a period of at least seven (7) days.

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4.3.5.2.1 The final pressure at the end of the test period within each section of the vacuum jacket must stabilize at or below 50 microns of Hg pressure to be acceptable.

4.4 Dimensional Verification

4.4.1 Pipe Assemblies

4.4.1.1 Pipe assemblies shall be dimensionally verified to be in accordance with the vendor’s fabrication drawings prior to packaging for shipment. Dimensional verification shall occur after testing is conducted in accordance with section 4.2.1.

4.5 Responsibility For Verification / Inspection

4.5.1 Verification/Inspection

4.5.1.1 The vendor shall be responsible for the performance of all verification (analysis, test, demonstration or inspection) requirements as specified herein. Except as otherwise specified, the vendor may use his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to witness or perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements.

4.5.1.2 The Vendor shall formulate acceptance test procedures for all components and will provide the facility and instrumentation to perform all relevant tests to ensure compliance with this specification. The acceptance test procedures shall include but not be limited to all of the testing procedures specifically outlined in this document.

4.5.1.3 All items purchased or manufactured by a subcontractor used in the Vendor’s work shall be clearly identified and tabulated.

4.5.1.4 All material and components shall be traceable to original vendor via material certification records.

4.5.1.5 The Government reserves the right to have access to the Vendor’s facility at any time during the design, fabrication and code testing. The Government shall have the right to witness any manufacturing or testing procedures upon request. When requested, the Vendor shall provide a minimum of 7 work days’ notice in advance of any test date to allow for the Government (or its designated contractor representative) to make the necessary travel arrangements.

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4.5.1.6 Review of analysis data and procedures by the Government shall not release the Vendor from its responsibility to correct errors, oversights and omissions to ensure conformance to the requirements in this document and ASME code requirements.

5. PREPARATION FOR DELIVERY

5.1 Preservation

5.1.1 Protective pressure cap.

5.1.1.1 The VJ pipe spools shall be furnished with stainless steel protective pressure caps to prevent damage or contamination during storage, transportation and handling. Capability shall be provided to field monitor blanket pressure, isolate pressure gage and re-establish any lost blanket pressure. All components and fittings shall be cleaned to fabricated component level or better.

5.1.2 Packaging Cleanliness

5.1.2.1 All pipe assemblies shall be packaged per KSC-C-123J level 300, ISO 14952 level 300, or NASA approved equivalent. Packing design shall be approved by the Government prior to use.

5.1.3 Vacuum in Annulus

5.1.3.1 Vacuum levels at delivery to the owner shall be 50 microns of Hg pressure or less

5.1.3.2 Annulus shall be sealed and maintained at vacuum levels from acceptance tests.

5.1.3.3 All pipe assembly vacuum levels shall be checked and recorded prior to shipment for validation at KSC receiving site prior to acceptance.

5.1.4 Inner Line Pressure

5.1.4.1 Cleanliness of KSC-C-123J level 300, ISO 14952 level 300, or vendor submitted equivalent (requires NASA approval) shall be maintained.

5.1.4.2 Seal inner pipe ends and ports with pressure retaining caps equipped with pressure gage and gas charging tee (1 set per pipe assembly). Caps shall be added to each inner pipe not terminated by an existing flange. Additional length of inner pipe material will be necessary to allow removal of cap for installation into next level of assembly.

5.1.4.3 Establish a minimum dew point of minus 65F (24 ppm) using 2 micron filtered MIL- PRF-27401F, Type I, Grade B GN2 in accordance with Test Method III (A.3.3) of KSC- C-123 then establish a 5 +/-2 psig GN2 blanket pressure

24 24 — None

5.1.4.4 Leak check shall be performed on pressure ports using MIL-PRF-25567 Type 1 or 2 leak check fluid. Verify no bubble formation for one minute minimum.

5.1.5 Recordings

5.1.5.1 All pipe assembly vacuum levels shall be checked and recorded prior to shipment for validation at KSC receiving site prior to acceptance.

5.1.5.2 All pipe assembly GN2 blanket pressures shall be checked and recorded prior to shipment for validation at KSC receiving site prior to acceptance.

5.2 Packing

The vendor shall protect entire pipe section length from damage using isolation / separation means between segments during shipment. Pipes may be shipped on saddle supports with hold-downs, or equivalent means. Shipping containers shall conform to freight classification rules and applicable container specifications. These shipping containers shall be capable of being picked-up by fork lift or lifting straps.

6. NOTES

6.1 Intended Use

This document is intended to establish the requirements for fabrication and testing of LO2 vacuum jacketed pipe.

NOTICE. The Government drawings, specifications, and/or data are prepared for the official use by, or on behalf of, the United States Government. The Government neither warrants these Government drawings, specifications, or other data, nor assumes any responsibility or obligation, for their use for purposes other than the Government project for which they were prepared and/or provided by the Government, or any activity directly related thereto. The fact that the Government may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data is not to be regarded, by implication or otherwise, as licensing in any manner the holder or any other person or corporation nor conveying the right or permission to manufacture, use, or sell any patented invention that may relate thereto.

Custodian:

Preparing Activity:

NASA – John F. Kennedy Space Center Kennedy Space Center, Florida 32899

John F. Kennedy Space Center

5.2 Packing