Article

A Guide for Recertification of Ground Based Pressure Vessels and Liquid Holding Tanks

12/1987;

ABSTRACT This guideline supports the USAF recertification requirements contained in the 'Standard General Requirements for Safe Design and Operation of Pressurized Missile and Space Systems,' MIL-STD-1522. In addition, this guideline has wide applicability to vessels containing high pressure gases, cryogenics, hypergolics, or other hazardous fluids. The overall objective of this guideline is to present a step-by-step methodology designed to evaluate the current condition of vessels which have been in operation for a number of years in a wide variety of service environments. The methodology presented addressed four major areas which may be the root cause of service-related failures: (1) corrosion, (2) stress and fatigue, (3) design, fabrication, and installation, and (4) operation and maintenance. The methodology for recertification of vessels and tanks is divided into five phases: (1) documentation retrieval and review, (2) engineering assessment, (3) inspection and test planning, (4) inspection and test implementation, and (5) safe-life evaluation and inservice inspection plan initiation. Keywords: Pressure vessels, Certification, Recertification, Residual life assessment, Failure prevention, Nondestructive testing.

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