1、Lessons Learned Entry: 1430Lesson Info:a71 Lesson Number: 1430a71 Lesson Date: 2001-08-23a71 Submitting Organization: LARCa71 Submitted by: Grant WatsonSubject: Pressure Systems Design, Installation and Safety (2001) Abstract: There have been several incidents involving ground-based pressure systems
2、 and components that have resulted in “near misses.“ All of these incidents were the result of systems and/or components that were either improperly designed, installed, or operated. Also, an incident occurred were a facilitys ability to do research was impacted because a pressure system was not des
3、igned and manufactured in accordance with the appropriate consensus codes.Description of Driving Event: For example, a relief valve line violently deformed during operation as a result of improper design and installation. Had personnel been close to the vent line when this event occurred, serious in
4、jury could have resulted. Other examples include tubing that separated from a fitting while under pressure, because it was improperly swaged and failure of a pressurized fitting due to improper assembly.Lesson(s) Learned: A large majority of these incidents were attributed to pressure systems and co
5、mponents being procured, installed, and/or repaired by personnel who were not experienced in the design, specification, and installation of pressure systems.Recommendation(s): Personnel are reminded that pressurized systems are inherently dangerous if not designed, installed, and operated in accorda
6、nce with national consensus codes and standard practices. Personnel are also reminded that any pressure system with an operating pressure greater than 125 psi shall be reviewed Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-by the Pressure Systems M
7、anager for inclusion in the pressure systems recertification program. Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Exploration Systemsa71 Sciencea71 Space Operationsa71 Aeronautics ResearchAdditional Key Phrase(s): a71 Accident Investig
8、ationa71 Facilitiesa71 Hardwarea71 Human Factorsa71 Mishap Reportinga71 Pressure Vesselsa71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 2004-06-04a71 Approval Name: Leslie Johnsona71 Approval Organization: LARCa71 Approval Phone Number: 757-864-9409Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
