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  • ISA 20 : 1981

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    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    SPECIFICATION FORMS FOR PROCESS MEASUREMENT AND CONTROL INSTRUMENTS, PRIMARY ELEMENTS AND CONTROL VALVES

    Available format(s):  Hardcopy

    Superseded date:  12-01-2014

    Language(s):  English

    Published date:  01-01-1981

    Publisher:  International Society of Automation

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

    1 Purpose
    2 Scope
    3 Receiver instruments
    4 Annunciators
    5 Potentiometer instruments specification sheet
       instructions
    6 Temperature instruments (filled systems)
    7 Thermocouples and thermowells
    8 Resistance temperature sensors
    9 Bi-metal thermometers
    10 Differential pressure instruments
    11 Orifice plates and flanges
    12 Rotameters
    13 Magnetic flowmeters
    14 Turbine flowmeters
    15 Positive displacement meters
    16 Level instruments (displacer or float)
    17 Level instruments, capacitance type
    18 Gage glasses and cocks
    19 Traps and drainers
    20 Pressure instruments
    21 Pressure gages
    22 Pressure switches
    23 Instructions for control valve data sheet - ISA Form
       S20.50, Rev. 1
    24 Pressure control valves - pilots & regulators
    25 Self-actuated temperature regulators
    26 Pressure relief valves
    27 Rupture discs
    28 Solenoid valves

    Abstract - (Show below) - (Hide below)

    Gives uniformity in instrument specifications, both in content and form. Due to the complexity of present day instruments and controls it is desirable to have some type of specification form to list pertinent details for use by all interested parties.

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

    Committee SP20
    Development Note Formerly it was ISA-S20 (05/2001) Also available in: Forms in Excel format on CD-ROM format, Instrument Forms Plus LITE. (01/2007)
    Document Type Standard
    Publisher International Society of Automation
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    API RP 14C : 2017 ANALYSIS, DESIGN, INSTALLATION, AND TESTING OF SAFETY SYSTEMS FOR OFFSHORE PRODUCTION FACILITIES
    ISA RP60.4 : 1990 DOCUMENTATION FOR CONTROL CENTERS
    CSA C22.4 No. 1 : 2009(R2018) OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE
    CSA C22.4 PACKAGE : 2009 CONSISTS OF C22.4 NO. 1-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE AND C22.4 NO. 2-09, OBJECTIVE-BASED INDUSTRIAL ELECTRICAL CODE - SAFETY MANAGEMENT SYSTEM REQUIREMENTS
    UFC 3-430-11 : 2001 UNIFIED FACILITIES CRITERIA - BOILER CONTROL SYSTEMS
    ANSI/ISA TR77.70.01 : 2010(R2015) TRACKING AND REPORTING OF INSTRUMENT AND CONTROL DATA
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