《UL 252A 2016减压器》.pdfVIP

UL 252A ISBN 0-7629-0922-6 Compressed Gas Regulator Accessories NOVEMBER 26, 2003 − UL 252A tr1 Underwriters Laboratories Inc. (UL) 333 Pfingsten Road Northbrook, IL 60062-2096 UL Standard for Safety for Compressed Gas Regulator Accessories, UL 252A Third Edition, Dated November 26, 2003 Summary of Topics This new edition is a periodic re-issuance to ensure that UL’s Standards remain up-to-date with regard to format and editorial issues such as renumbering, repaginating, correction of editorial errors, correction of cross-references and updating titles of referenced Standards. Revisions to UL 252A reflect the discontinued used of cadmium plating in compressed gas regulator accessories and the replacement of ASTM No. 3 Swelling Oil with IRM 903 as stated in the bulletin dated April 9, 2003. UL Standards for Safety are developed and maintained in the Standard Generalized Markup Language (SGML). SGML -- an international standard (ISO 8879-1986) -- is a descriptive markup language that describes a document’s structure and purpose, rather than its physical appearance on a page. Due to formatting differences resulting from the use of UL’s new electronic publishing system, please note that additional pages (on which no requirements have been changed) may be included in revision pages due to relocation of existing text and reformatting of the Standard. The following table lists the future effective dates with the corresponding item. Future Effective Date References May 26, 2005 5.7 and 5.8 The new and revised requirements are substantially in accordance with UL’s Bulletin(s) on this subject dated April 9, 2003. The bulletin(s) is now obsolete and may be discarded. As indicate