1、 NASA TECHNICAL STANDARD NASA-STD-8719.17 Revision A National Aeronautics and Space Administration Approved: 2009-11-06 Washington, DC 20546-0001 NASA Requirements for Ground-Based Pressure Vessels and Pressurized Systems (PVS) MEASUREMENT SYSTEM IDENTIFICATION: INCH-POUND Approved for public releas
2、e distribution is unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 2 of 55 This page intentionally left blank. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD
3、8719.17A Page 3 of 55 DOCUMENT HISTORY LOG Status Document Revision Approval Date Description Baseline 2006-09-22 Initial Release Revision A 2009-10-09 Foreword changed “NASA programs and projects” to “NASA facilities, programs, and projects.” Editorial changes and change PV/S to PVS throughout. Par
4、agraph 3.2, Clarified definitions of pressure relief device, risk assessment code, test specific device, ground-based PV/S definition, changed “flight weight” to “flight.” Paragraph 4.1 deleted requirement redundant with NPR 8715.3. Numbered subparagraphs within paragraph 4.2, Renumbered paragraph 4
5、.2.1 as 4.2.3, and 4.2.1 subparagraphs as 4.3.1.x, etc. Paragraph 4.2.1.3 renumbered as 4.2.3.3 and scope of exclusion increased. 4.2.1.5 added exclusion for certain steam and condensate piping not to exceed 15 psig, 4.2.4 clarified assessed hazard exclusion requirements, 4.2.3.21 was renumbered to
6、4.2.3.22 and reworded for clarity, 4.3.3.8 deleted “to,” 4.3.3.15 added new paragraph requiring clear definition of system boundaries, 4.5.1, added “or analyses” to list of options for verification of PVS compliance with original requirements, 4.5.10 added new paragraph allowing continued operation
7、of systems certified under previous requirements provided certain requirements are met, renumbered previous 4.5.10 as 4.5.11, 4.5.12 was rewritten. 4.8.2.8.4 change “break” to “burst,” Table 4, note 1, changed “rupture” to “burst,” Table 4, change “” to “,” 4.9.2.6, add reference to Table 2, 4.9.4.1
8、 deleted requirement to send waivers to Headquarters because of redundancy with NPR 8715.3, paragraph 1.13, 4.10.1.7, add “as approved by the PSM,” 4.10.1.10 added “or back pressure regulators,” 4.11.2.3 provided that, with certain constraints, the PSM may extend certification periods for PVS to acc
9、ommodate operational or test Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 4 of 55 needs, 4.11.4.2 provided that, with certain constraints, the PSM may extend certification periods for components to accommodate operational or
10、 test needs, 6.2.1.2 changed “break” to “burst” This document is subject to reviews per Office of Management and Budget Circular A-119, Federal Participation in the Development and Use of Voluntary Standards (02/10/1998) and NPD 8070.6, Technical Standards (Paragraph 1.k). Provided by IHSNot for Res
11、aleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 6 of 55 This page intentionally left blank. Provided by IHSNot for ResaleNo reproduction or networking perm
12、itted without license from IHS-,-,-NASA-STD 8719.17A Page 7 of 55 TABLE OF CONTENTS CHAPTER 1 SCOPE . 9 1.1 Purpose 9 1.2 Applicability . 9 CHAPTER 2 REFERENCES . 10 2.1 Government Documents . 10 2.2 Non-Government Documents . 10 CHAPTER 3 ACRONYMNS AND DEFINITIONS 11 3.1 Acronyms 11 3.2 Definitions
13、. 12 CHAPTER 4 REQUIREMENTS . 15 4.1 Application of NPD 8710.5 15 4.2 Excluded PVS . 15 4.3 General Requirements . 18 4.4 Design and Construction Requirements for New PVS . 19 4.5 PVS Integrity Assessment of Existing Code PVS 22 4.6 Technical Waiver Requirements for New Non-Code PVS . 25 4.7 Existin
14、g Non-Code PVS (Legacy) 26 4.8 PVS Integrity Assessment, Remaining Life, and Inspection Requirements . 27 4.9 System Safety and Risk Assessment Requirements . 29 4.10 Requirements for Specific Components . 37 4.11 Certification and Recertification Process 42 4.12 Design, Operation, and Maintenance R
15、equirements . 44 CHAPTER 5 OTHER REFERENCES 46 CHAPTER 6 BASIS FOR TABLE 4 VALUES 48 6.1 Reference Documents . 48 6.2 Basis for Table 4 Values . 48 APPENDIX A INDEX . 55 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 8 of 55 L
16、IST OF TABLES TABLE 1: RAC DETERMINATION . 31 TABLE 2: SEVERITY DETERMINATION TABLE 32 TABLE 3: PROBABILITY DETERMINATION TABLE . 33 TABLE 4: TENTATIVE CATASTROPHIC PVS FAILURE RATES PER YEAR (MEDIAN VALUES) FOR CERTIFIED PVS . 33 TABLE 5: TECHNICAL WAIVER APPROVAL PROCESS . 37 TABLE 6: APPLICATION
17、OF NATIONAL CONSENSUS CODES, STANDARDS, AND LAWS TO PVS 46 TABLE 7: SUMMARY CATASTROPHIC FAILURE RATE DATA . 49 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 9 of 55 NASA Requirements for Ground-Based Pressure Vessels and Pre
18、ssurized Systems (PVS) CHAPTER 1 SCOPE 1.1 PURPOSE The purpose of this document is to ensure the structural integrity of PVS through implementation of a minimum set of requirements for ground-based PVS in accordance with this document, NASA Policy Directive (NPD) 8710.5, NASA Safety Policy for Press
19、ure Vessels and Pressurized Systems, NASA Procedural Requirements (NPR) 8715.3, NASA General Safety Program Requirements, applicable Federal Regulations, and national consensus codes and standards (NCS). 1.2 APPLICABILITY This standard applies to NASA Headquarters and NASA Centers, including Compone
20、nt Facilities, and to the Jet Propulsion Laboratory and to other contractors to the extent specified in their contracts. This standard applies to all ground-based equipment designed for, or operating at, positive or negative gauge pressure that is not specifically excluded in Paragraph 4.2. It appli
21、es to NASA-owned or -operated, temporary or permanent, ground-based PVS and to non-NASA-owned contractor or tenant ground-based PVS operated on NASA property if that PVS is determined by the Pressure Systems Manager (PSM) to pose a risk to NASA personnel, facilities, or equipment. It specifically in
22、cludes, subject to Paragraph 4.2, systems often referred to as “low pressure“ such as building and facility services equipment (e.g., shop air), laboratory systems, and vacuum systems. When conflicts exist between this document and NCS, this document shall take precedence, except in those cases wher
23、e the NCS is invoked by applicable Government regulation (Requirement). Requirements in addition to, and that do not conflict with, those listed herein may be appropriate for inclusion in Center-specific PVS policies and procedures to address unique applications and situations not covered by this do
24、cument. As provided for in NPD 8710.5, it is the PSMs responsibility to assure that such additional requirements are developed and included in the Centers certification process. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 1
25、0 of 55 CHAPTER 2 REFERENCES 2.1 GOVERNMENT DOCUMENTS 42 U.S.C. 2473(c)(1), section 203(c)(1) of the National Aeronautics and Space Act of 1958, as amended. Department of Labor (DOL), Occupational Safety and Health Administration (OSHA), 29 CFR Part 1910, Occupational Safety and Health Standards. DO
26、L, OSHA, 29 CFR Part 1960, Basic Program Elements for Federal Employees. Department of Transportation (DOT) 49 CFR. MIL-G-18977, Gauge, Pressure, Dial Indicating. NPD 8710.5, Policy for Pressure Vessels and Pressurized Systems. NPR 1441.1, NASA Records Retention Schedules. NPR 8000.4, Agency Risk Ma
27、nagement Procedural Requirements. NPR 8715.3, NASA General Safety Program Requirements. 2.2 NON-GOVERNMENT DOCUMENTS American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code (B to assess integrity, properties, and composition; and to measure geometrical characteristics. Non-Co
28、de PVS: Any pressure vessel that is not stamped with the appropriate symbol and documented as complying with the original applicable construction Code or any pressure piping system that does not meet the requirements of the appropriate fabrication code (e.g. ASME Section VIII, B31.1, B31.3), includi
29、ng PVS that were fabricated from non-Code materials by non-Code processes or organizations. Owner: The management of the organization responsible for the PVS as defined in NPD 8710.5, Policy for Pressure Vessels and Pressurized Systems. Policy Waiver: Documented and approved Center policy contrary t
30、o the policy in NPD 8710.5, Policy for Pressure Vessels and Pressurized Systems, or this standard. (See NPR 8715.3, paragraph 1.13, for waiver requirements.) Pressure Relief Device (PRD): A device designed to open without intervention by an operator and relieve excess pressure so as to protect the P
31、VS on which it is installed from damage due to that pressure. Pressure Safety Valve (PSV): A pressure relief device designed to actuate on inlet static pressure and to reclose after normal conditions have been restored. Note: this definition is that of ASME PTC 25-2001. Provided by IHSNot for Resale
32、No reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 14 of 55 Pressure Systems Manager: The person responsible for implementation of NPD 8710.5, Policy for Pressure Vessels and Pressurized Systems, and this standard at a NASA facility. Pressure Vessels and Pres
33、surized Systems (PVS): Pressure vessels and pressurized systems within the scope of NPD 8710.5, Policy for Pressure Vessels and Pressurized Systems, and this standard. Risk Assessment Code: A numerical expression of comparative risk of a condition determined by an evaluation of both the potential se
34、verity of a consequence and the likelihood of that consequence occurring. Recertification: The renewal of a previous certification with adjustments as necessary to accommodate new information, configuration or operating parameter changes, or PVS degradation. Technical Waiver: Single or case-by-case
35、waiver from this standard. Test Article PVS: A PVS object(s) being tested for the sole purpose of obtaining data (other than integrity data) on the object(s). Test Specific PVS: PVS used to perform limited testing of a specific test article. PVS used on a permanent or repeated basis, or built up of
36、components used repeatedly for testing different hardware or configurations are not part of this category. Waiver: As defined in NPR 8715.3. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 15 of 55 CHAPTER 4 REQUIREMENTS 4.1 AP
37、PLICATION OF NPD 8710.5 This document provides a greater level of detail of requirements and identifies responsible parties, consistent with NPD 8710.5. 4.2 EXCLUDED PVS 4.2.1 The following PVS do not require certification in accordance with NPD 8710.5, Policy for Pressure Vessels and Pressurized Sy
38、stems and are excluded from the requirements of this standard provided they are covered under appropriate inspection and maintenance programs. Each Centers PSM has the authority to require inclusion of any excluded system at that Center due to the hazards presented by its use in a particular applica
39、tion. 4.2.2 Excluded systems are subject to the requirements of the Occupational Safety and Health Administration (OSHA), the applicable NCS, and NASA safety requirements. Operation of COTS systems shall be within manufacturers placard limitations (Requirement). 4.2.3 Category Exclusions. 4.2.3.1 Wa
40、ter systems under 150 pounds per square inch gauge (psig) for which surge is not a design consideration or has been mitigated. 4.2.3.2 Water deluge systems not to exceed 250 psig for which there is no hazard to personnel in the event of failure. 4.2.3.3 Control, instrument, shop air, or inert gas pi
41、ping systems with Maximum Allowable Working Pressure (MAWP) not to exceed 150 psig and line sizes not to exceed Nominal Pipe Size (NPS) 1/2. Each Centers PSM has authority to increase line size limit of air or inert gas systems covered under this exclusion to NPS 2 without a waiver by addressing ris
42、k through appropriate analysis and imposing additional conditions to this exclusion as needed. Relief valves and pressure vessels (air receivers, tanks, etc.) are not included in this exclusion. This exclusion does not apply to higher pressure or larger size PVS that supply the lower pressure PVS. 4
43、.2.3.4 COTS hot water systems for buildings. 4.2.3.5 Steam and condensate systems for building heating up to 15 psig, regardless whether the steam comes from a low-pressure boiler, or a high-pressure central heating plant. If the excluded steam system is fed by a higher-pressure steam system, the fi
44、rst relief device following the pressure-reducing component is not excluded, and shall be certified in accordance with this standard (Requirement). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NASA-STD 8719.17A Page 16 of 55 4.2.3.6 COTS prepackag
45、ed pressurized water and steam cleaning systems maintained and operated in strict accordance with the manufacturers recommendations. This does not include custom fabricated/assembled systems. 4.2.3.7 Fire protection water systems for facilities. 4.2.3.8 COTS prepackaged refrigerators, freezers, and
46、heating, ventilating, and air conditioning (HVAC) equipment. 4.2.3.9 Fire extinguishers covered by: 29 CFR Part 1910, Subpart L, “Fire Protection,“ including portable extinguishers, standpipe and hose systems, automatic sprinkler systems, fixed dry chemical extinguishing systems, carbon dioxide exti
47、nguishing systems, and halogenated extinguishing agent systems. 4.2.3.10 Glove boxes. 4.2.3.11 Fuel storage PVS supplied with licensed motorized vehicles and meeting applicable Department of Transportation (DOT) regulatory requirements. 4.2.3.12 COTS prepackaged hydraulic systems. 4.2.3.13 COTS weld
48、ing equipment. 4.2.3.14 COTS laboratory equipment, with the following caveats; 4.2.3.14.1 Equipment that could be pressurized above its MAWP for any reason by the fluid delivery system shall have appropriate overpressure protection installed and the fluid delivery system shall be certified by the PSM in accordance with this standard (Requirement). 4.2.3.14.2 This exclusion does not apply to laboratory designed and assembled systems. 4.2.3.14.3 An example is a mass spectrometer with a manufacturers placard rating of 25 psig that rec
