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  • API 681 : 1996

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    LIQUID RING VACUUM PUMPS AND COMPRESSORS FOR PETROLEUM, CHEMICAL, AND GAS INDUSTRY SERVICES

    Available format(s):  Hardcopy, PDF

    Superseded date:  20-02-2021

    Language(s):  English

    Published date:  01-01-2010

    Publisher:  American Petroleum Institute

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    Table of Contents - (Show below) - (Hide below)

    Section 1 - General
    1.1 Scope
    1.2 Alternative designs
    1.3 Conflicting requirements
    1.4 Definition of terms
    1.5 References
    1.6 Unit conversion
    Section 2 - Basic design
    2.1 General
    2.2 Casings
    2.3 Casing connections
    2.4 External forces and moments
    2.5 Rotating elements
    2.6 Mechanical shaft seals
    2.7 Dynamics
    2.8 Bearings, bearing housings, and lubrication
    2.9 Materials
    2.10 Nameplate and rotation arrows
    Section 3 - System design
    3.1 Ring liquid system
    3.2 Controls and instrumentation
    3.3 Drivers and transmissions
    3.4 Couplings and guards
    3.5 Belt drives
    3.6 Mounting plates
    3.7 Piping
    3.8 Special tools
    Section 4 - Inspection, testing, and preparation for
          shipment
    4.1 General
    4.2 Inspection
    4.3 Testing
    4.4 Preparation for shipment
    Section 5 - Vendor's data
    5.1 General
    5.2 Proposals
    5.3 Contract data
    Appendix A - Liquid ring vacuum pump and compressor
                 system data sheets
    Appendix B - Liquid ring vacuum pump schematic
    Appendix C - Shaft deflection schematic
    Appendix D - Liquid ring vacuum pump ring liquid flow
                 schematics
    Appendix E - Mechanical seal and piping arrangement
                 schematics
    Appendix F - Material list
    Appendix G - Liquid ring vacuum pumps and compressors
                 vendor drawing and data requirements
    Appendix H - System considerations, operating variables,
                 and test performance conversion

    Abstract - (Show below) - (Hide below)

    Gives the minimum requirements for liquid ring vacuum pump and compressor systems for service in the petroleum, chemical, and gas industries.

    General Product Information - (Show below) - (Hide below)

    Document Type Standard
    Product Note Reconfirmed 1996
    Publisher American Petroleum Institute
    Status Superseded
    Superseded By

    Standards Referencing This Book - (Show below) - (Hide below)

    AGMA 9002 : B BORES AND KEYWAYS FOR FLEXIBLE COUPLINGS (INCH SERIES)
    ABMA 9 : 2015 LOAD RATINGS AND FATIGUE LIFE FOR BALL BEARINGS
    CFR 29(PTS1900-1910) : 0 LABOR - OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
    EEMUA 151 : 1987 LIQUID RING VACUUM PUMPS AND COMPRESSORS
    API 520-1 : 2014 SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 1: SIZING AND SELECTION
    API RP 615 : 2016 VALVE SELECTION GUIDE
    NFPA 496 : 2017 PURGED AND PRESSURIZED ENCLOSURES FOR ELECTRICAL EQUIPMENT
    API 5L : 2012 LINE PIPE
    API 670 : 2014 MACHINERY PROTECTION SYSTEMS
    API 500A : 4ED 82(R1987) CLASSIFICATION OF LOCATIONS FOR ELECTRICAL INSTALLATIONS IN PETROLEUM REFINERIES
    AISC 316 : 9ED 89 ERRATA ASD MANUAL OF STEEL CONSTRUCTION
    ANSI S2.19 : 0 MECHANICAL VIBRATION - BALANCE QUALITY REQUIREMENTS OF RIGID ROTORS - PART 1: DETERMINATION OF PERMISSIBLE RESIDUAL UNBALANCE, INCLUDING MARINE APPLICATIONS
    API 660 : 2015 SHELL-AND-TUBE HEAT EXCHANGERS
    NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
    SSPC-SP 6 : 2015 COMMERCIAL BLAST CLEANING
    API 526 : 2017 FLANGED STEEL PRESSURE-RELIEF VALVES
    ASTM E 125 : 1963 : R2003 Standard Reference Photographs for Magnetic Particle Indications on Ferrous Castings
    API 610 : 2010 CENTRIFUGAL PUMPS FOR PETROLEUM, PETROCHEMICAL AND NATURAL GAS INDUSTRIES
    TEMA STANDARDS : 9ED 2007 STANDARDS OF THE TUBULAR EXCHANGER MANUFACTURERS ASSOCIATION
    ABMA 20 : 2011 RADIAL BEARINGS OF BALL, CYLINDRICAL ROLLER AND SPHERICAL ROLLER TYPES - METRIC DESIGN
    ASTM E 709 : 2015 : REDLINE Standard Guide for Magnetic Particle Testing
    AWS D1.1/D1.1M : 2015 STRUCTURAL WELDING CODE-STEEL
    ASTM A 515/A515M : 2017 : REDLINE Standard Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service
    ASTM A 524 : 1996 Standard Specification for Seamless Carbon Steel Pipe for Atmospheric and Lower Temperatures
    ABMA 19.1 : 2011 TAPERED ROLLER BEARINGS - RADIAL - METRIC DESIGN
    ABMA 19 : 1975 TAPERED ROLLER BEARINGS - RADIAL INCH DESIGN
    AGMA 9000 : C FLEXIBLE COUPLINGS - POTENTIAL UNBALANCE CLASSIFICATION
    API 520-2 : 2015 SIZING, SELECTION, AND INSTALLATION OF PRESSURE-RELIEVING DEVICES - PART 2: INSTALLATION
    ABMA 7 : 1995 SHAFT AND HOUSING FITS FOR METRIC RADIAL BALL AND ROLLER BEARINGS (EXCEPT TAPERED ROLLER BEARINGS) CONFORMING TO BASIC BOUNDARY PLAN
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