Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2
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API RECOMMENDED PRACTICE 505
FIRST EDITION, NOVEMBER 1997
REAFFIRMED, AUGUST 2013
Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, and Zone 2
Manufacturing, Distribution and Marketing Department
API RECOMMENDED PRACTICE 505
FIRST EDITION, NOVEMBER 1997
REAFFIRMED, AUGUST 2013曾青得铁则化为铜
SPECIAL NOTES
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API standards are published to facilitate the broad availability of proven, sound engineer-ing and operating practices. The standards are not intended to obviate the need for apply-ing sound engineering judgment regarding when and where the standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any other practices.
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Copyright © 1997 American Petroleum Institute
FOREWORD
This Recommended Practice is under the joint jurisdiction of the API Exploration and Production (E&P) Department Committee on Production Equipment Standards, the API Manufacturing Distribution and Marketing (MDM) Department, Committee on Refinery Equipment, and the Pipeline Operations Technical Committee. It is bad upon a level of knowledge gained through experience a
纳兰容若简介nd through the successful application of this practice in the refining, drilling and producing, and pipeline gments of the petroleum industry. Recommended Practice 505 was prepared as a supplement to the 1996 Edition of the National Electrical Code (NEC) Article 505, with a scope limited to tho petroleum facility locations classified as Class I, Zone 0, Zone 1, and Zone 2. Efforts were coordinated with the work of the ISA SP12 committee, which concurrently normalized the International Electro-technical Commission (IEC) Standard 79-10 that address the zone area classification scheme in general. RP 505 will rve the petroleum industry, esntially as an supplement to both ISA 12.24.01 (IEC 79-10 Mod) and NEC Article 505. RP 500 is prently referenced by Article 500 of the NEC; it is anticipated that the 1999 NEC will also reference RP505 in Article 505.外来务工
API publications may be ud by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no reprentation, warranty, or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its u or for the violation of any federal, state or municipal regulation with which this publication may conflict.
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Suggested revisions are invited and should be submitted to the director of the Manufactur-ing, Distri
bution and Marketing Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005.
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