Transcription of Material Selection for Gaseous Oxygen Service
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Material Selection for Gaseous Oxygen Service
P O B o x 3 11 5 4 S t . L o u i s, M O 6 3 1 3 1 - 0 1 5 4 P h o n e : ( 3 1 4 ) 9 6 6 - 8 9 1 9 ~ E m a i l : w m h u i t t @ a o l . c o m 1 Material Selection for Gaseous Oxygen Service by William M. Huitt (From a letter dated March 7, 2001 in response to a project s need to select tubing Material for Oxygen Service .) In selecting a pipe or tubing Material for Gaseous Oxygen Service there are four basic criteria: % Oxygen in the gas, pressure, temperature and velocity. As you can see by Fig. 1, if the system operates below 200 psig at 200 F then carbon steel or stainless steel would be suitable Material at almost any velocity. However, above those markers velocity becomes an issue and the Material Selection narrows. Figure 1 Maximum velocity versus internal pressure for steel pipelines ( mole% or higher Oxygen ) (Griffith and Wallis, Journal of Heat Transfer, August 1961) If a system is operating in a range above the curve in Fig.
ranking. I provided table 1 so you can see the hierarchy of metals as it pertains to their Burn Ratios. As you can see, the carbon steels, stainless steels and coppers have the lower, more acceptable Burn Ratios, with copper being the lowest of those three. In the event flame propagation does occur, due to some ignition
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