Date: Tue, 2 Feb 2010 14:56:24 +0530 From: Tejasvini.Ranadive@ril.com Following two references are got from API521:2007 ADDENDUM, MAY 2008 Pls confirm/provide the source from where these can be available!!! Bibliography Sr. No. 51 & 52 I. HEITNER, T. TRAUTMAUIS, and M. MORRISSEY, Relieving Requirements for Gas Filled Vessels Exposed to Fire, 1983 Proceedings—Refining Department, Volume 62, American Petroleum Institute, Washington, D.C., pp. 112–122, and Hydrocarbon Processing, November 1983, pp. 263-268 J. O. FRANCIS and W. E. SHACKELTON, A Calculation of Relieving Requirements in the Critical Region, 1985 Proceedings — Refining Department, Volume 64, American Petroleum Institute, pp. 179–182 Regards, Tejasvini Ranadive Reliance Industries Ltd. Central Library, Patalganga Tel: 02192-256270 tejasvini.ranadive@ril.com "Kind words can be short and easy to speak, but their echoes are truly endless"