pec_11N-1994_scan.pdf

Specification for Lease Automatic Custody Transfer(LACT)Equipment API SPECIFICATION 11 N FOURTH EDITION,NOVEMBER 1,1994 American Petroleum Institute1220 L Street,NorthwestWashington,D.C.20005 ii?Specification for Lease Automatic Custody Transfer(LACT)Equipment Exploration and Production Department API SPECIFICATION 11 N FOURTH EDITION,NOVEMBER 1,1994 American Petroleum Institute 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 and precautions,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 any right,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against liability for infringement of letters patent.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least every five years.Sometimes a one-time extension of up to two years will be added to this review cycle.This publication will no longer be in effect five 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 Authoring Department telephone(214)953-1101.A catalog of API publications and materials is published annually and updated quarterly by API,1220 L Street,N.W.,Washington,D.C.20005.This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard.Questions concerning the interpretation of the content of this standard or comments and questions concerning the procedures under which this standard was developed should be directed in writing to the director of the Exploration and Production Department,American Petroleum Institute,700 North Pearl,Suite 1840,Dallas,Texas 75201.Requests for permission to reproduce or translate all or any part of the material published herein should also be addressed to the director.API publications may be used 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 representation,warranty,or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal,state,or municipal regulation with which this publication may conflict.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 other practices.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.Copyright 1994 American Petroleum Institute CONTENTS 1 SCOPE.1.1 Coverage.1.2-1.3-1.4 1.5.1.6 1.7-1.8 Page 1 1 1 1 1 1 1 2 REFERENCES AND ABBREVIATIONS.2 3 DEFINITIONS.3 3.1.3 3.2.3 4 SHOP ASSEMBLY,TESTING,AND WARRANTY.3 4.1.3 4.2.3 4.3 3 5 MECHANICAL AND HYDRAULIC SPECIFICATIONS.3 5.1 Skid Mounting.3 5.2-5.3 5.4 5.5 Hydraulic Assembly.Piping.5.6 Weather Protection.3 3 3 3 3 6 CHARGING PUMP AND MOTOR.3 6.1 Pump.3 6.2.3 6.3.3 6.4-4 6.5.6.6 6.7 6.8 6.9 6.10 6.11 Motor.4 4 4 4 4 4 4 7 STRAINER AND/OR(OPTIONAL)AIR/GAS ELIMINATOR.4 7.1-4 7.2.4 7.3.7.4-7.5 4 4 4 8 SEDIMENT AND WATER PROBE,MONITOR,AND DIVERTER VALVE.4 8.1.4 8.2.4 8.3 Diverter Valve(Optional).4 8.4 4 iii 8.5 4 9 DISPLACEMENT METER OR TURBINE METER.4 9.1.4 10 THERMOWELLANDTHREE-WAYPROVERLOOP.5 10.1 Thermowell.5 10.2.5 10.3 Prover Loop.5 10.4 10.5 5 5 11 BACK-PRESSURE VALVE.5 11.1 11.2 11.3 11.4 12 SAMPLING.12.1 General Considerations.12.2 Sample Connection.12.3 Sample Probe.12.4 Sample Stream Piping.12.5 Sampler.12.6 Sample Container.13 ELECTRICAL.13.1.13.2 13.3 13.4 13.5-13.6 Safety Features.13.7 13.8 13.9 .13.10.13.11.13.12 Power Enclosure.13.13.13.14.13.15 Ala