Norma Valvula Mariposa

Butterfly Valves: Double Flanged, Lug- and Wafer-Type

API STANDARD 609 SIXTH EDITION, MAY 2004

Copyright American Petroleum Institute Reproduced by IHS under license with API No reproduction or networking permitted without license from IHS

--````,,-`-`,,`,,`,`,,`---

Not for Resale

Copyright American Petroleum Institute Reproduced by IHS under license with API No reproduction ornetworking permitted without license from IHS

Not for Resale

--````,,-`-`,,`,,`,`,,`---

Butterfly Valves: Double Flanged, Lug- and Wafer-Type

Downstream Segment API STANDARD 609 SIXTH EDITION, MAY 2004
--````,,-`-`,,`,,`,`,,`---

Copyright American Petroleum Institute Reproduced by IHS under license with API No reproduction or networking permitted without license from IHS

Not forResale

SPECIAL NOTES
API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed. API is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks andprecautions, nor undertaking their obligations under local, state, or federal laws. Information concerning safety and health risks and proper precautions with respect to particular materials and conditions should be obtained from the employer, the manufacturer or supplier of that material, or the material safety data sheet. Nothing contained in any API publication is to be construed as granting anyright, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent. Generally, API standards are reviewed and revised, reafÞrmed, or withdrawn at least every Þve years. Sometimes a one-timeextension of up to two years will be added to this review cycle. This publication will no longer be in effect Þve years after its publication date as an operative API standard or, where an extension has been granted, upon republication. Status of the publication can be ascertained from the API Standards department telephone (202) 682-8000. A catalog of API publications, programs and services ispublished annually and updated biannually by API, and available through Global Engineering Documents, 15 Inverness Way East, M/S C303B, Englewood, CO 80112-5776. This document was produced under API standardization procedures that ensure appropriate notiÞcation and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content ofthis standard or comments and questions concerning the procedures under which this standard was developed should be directed in writing to the Director of the Standards department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005. Requests for permission to reproduce or translate all or any part of the material published herein should be addressed to the Director, BusinessServices. API standards are published to facilitate the broad availability of proven, sound engineering and operating practices. These standards are not intended to obviate the need for applying sound engineering judgment regarding when and where these standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any otherpractices. Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable requirements of that standard. API does not represent, warrant, or guarantee that such products do in fact conform to the applicable API standard.

All rights reserved. No part of this work may be reproduced, stored...