NASA-LLIS-0226

Lessons Learned - Valve Seats

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T16:49:24Z
date available	2017-09-04T16:49:24Z
date copyright	06/21/1993
date issued	1993
identifier other	WKZCQCAAAAAAAAAA.pdf
identifier uri	https://yse.yabesh.ir/std/handle/yse/112918
description abstract	Description of Driving Event: A tube trailer was being filled with oxygen with a 1000 psi differential between the trailer and supply when a flash was observed in the area of the remotely operated control valve. A subsequent rush of gas and fire followed. The fire continued for about 40 seconds and was extinguished by the onrush of gas from the ruptured stainless steel manifold lines that had been burned off. The investigating board concluded that the nylon seats in the valve had deteriorated to the extent that the ball was able to vibrate freely under the high flow conditions present. The vibration would most likely be severe while attempting to flow oxygen against a closed ball valve with missing or deteriorated seats. This would have generated sufficient energy through impact and heat to cause ignition.
language	English
title	NASA-LLIS-0226	num
title	Lessons Learned - Valve Seats	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1993
contenttype	fulltext
subject keywords	Energetic Materials - Explosive/Propellant/Pyrotechnic
subject keywords	Explosives Handling
subject keywords	Parts Materials & Processes