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s and annulments, then appear in the next update. As of the 1992 and later editions, all Cases currently in effect at the time of publication of an edition are included with it as an update. The ASME B31 Code for Pressure Piping Standards Committee took action to eliminate Code Case expiration asme pdf dates effective September 21, 2007. This means that all Code Cases listed in this update and beyond will remain available for use until annulled by the ASME B31 Code for Pressure Piping Standards Committee. This update, Cases No. 33, which is included after the last page of the 2008 Addenda and the Interpretations Volume 43 that follow, contains the following Cases: 175 176 177 179 182 183 The page numbers for the Cases supplements included with updates to the 2007 Edition start with C-1 and will continue consecutively through the last update to this Edition.

The Cases affected by this supplement are as follows: Page C-15 C-17 C-19 C-20 C-21 C-23 Location Case 175 Case 176 Case 177 Case 179 Case 182 CaseChange Expiration date eliminated Expiration date eliminated Expiration date eliminated Expiration date eliminated Expiration date eliminated Expiration date eliminated INTENTIONALLY LEFT BLANK ASME B31.1 CASES B31 CASE 175 ASTM B 16 (UNS C36000) and B 453 (UNS C35300) in ASME B31.1 Construction Approval Date: September 12, 2003 Reaffirmation Date: August 7, 2007 Inquiry: May brass alloys rods and bars conforming to ASTM B 16 (UNS C36000) and B 453 (UNS C35300) be used for ASME asme pdf B31.1 constructionfi Reply: It is the opinion of the Committee that brass alloys rods and bars conforming to ASTM B 16 (UNS C36000) and B 453 (UNS C35300) may be used for B31.1 construction provided: (a) These materials shall not be used for boiler exter- nal piping except where specifically permitted by Section I. See para. 100.1.2(A). (b) The maximum permissible design temperature shall not exceed 406