Detail of SH/T 3005-2016

Introduction of SH/T 3005-2016

1 Scope This specification states the design principles and basic requirements for instrumentation selection in petrochemical industry. This specification is applicable to the design for instrumentation selection in petrochemical industry and for new construction, extension and renovation of factories using coal as raw materials to prepare fuel and chemical products. This specification is not applicable to analytical instruments used in laboratories, maintenance workshop instrumentation and portable instrumentation. 2 Normative references The following documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB 3100-1993 The international system of units and its application GB 3836.1-2010 Explosive atmospheres — Part 1: Equipment — General requirements GB 4208-2008 Degrees of protection provided by enclosure (IP code) GB 17167-2006 General principle for equipping and managing of the measuring instrument of energy in organization of energy using GB 50160-2008 Fire prevention code of petrochemical enterprise design GB 50493-2009 Specification for design of combustible gas and toxic gas detection and alarm for petrochemical industry GBZ 125-2009 Radiological protection requirements for gauges containing sealed radioactive source TSG R0004-2009 Supervision regulation on safety technology for stationary pressure vessel GB/T 13283-2008 Accuracy class of measuring instruments and display instruments for industrial process measurement and control GB/T 18603-2001 Technical requirements of measuring systems for natural gas GB/T 2624.1-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 1: General principles and requirements GB/T 2624.2-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 2: Orifice plates GB/T 2624.3-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 3: Nozzles and Venturi nozzles GB/T 2624.4-2006 Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full — Part 4: Venturi tubes GB/T 4213-2008 Pneumatic control valve GB/T 13927-2008 Industrial valves—Pressure testing SH/T 3020-2013 Design specification for instrument air supply system in petrochemical industry SH/T 3174-2013 Design specification on-line analyzer systems in petrochemical industry 3 Terms and definitions For the purposes of this specification, the following terms and definitions apply. 3.1 measuring range interval determined by two values of the measured variable, which is measured with specified accuracy 3.2 span algebraic difference between the upper and lower limits of a given range 3.3 rangeability ratio of the maximum span to the minimum span within which an instrument or a device can be calibrated to a specified accuracy class 3.4 accuracy degree of consistency between the measured value and the true value (actual value), which indicates the measuring error 3.5 accuracy class class and level of instruments that meet certain measurement requirements and keep the fiducial error or relative error within the specified limit   3.6 sensitivity ratio of the change in output to the change in input when the instrument is in steady state, indicating how sensitive the instrument is to changes in the measured parameters. It can also be described as the degree of amplification of the changes in output of the measured parameter 3.7 resolution ability of the instrument to discriminate between differences in the measured values. degree to reflect the minimum value of the change in measured parameter that can be detected with certainty by the instrument

Contents of SH/T 3005-2016

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 General requirements 5 Temperature instruments 5.1 Temperature measurement unit and span 5.2 Local temperature instruments 5.3 Remote measurement temperature instruments 6 Pressure instruments 6.1 Pressure measurement unit and span 6.2 Local pressure instruments 6.3 Remote measurement pressure instruments 7 Flow instruments 7.1 Flow measurement unit, span and accuracy 7.2 Differential pressure flowmeter 7.3 Rotameters 7.4 Velocity-type flowmeters 7.5 Positive displacement flowmeters 7.6 Mass flowmeters 7.7 Solid flowmeters and flow switches 8 Level instruments 8.1 Local level instruments 8.2 Remote measurement level instruments 8.3 Level switches 9 Process analyzers 9.1 General specification for process analyzers 9.2 Gas analyzers 9.3 Gas analyzer 10 Control valve 10.1 Control valve 10.2 Self-regulating control valves 10.3 On-off valves 11 Special measurement instruments 11.1 Weigh instruments 11.2 Mechanical shaft vibration measurement instruments Annex A (Informative) Selection reference for flow instruments Annex B (Informative) Selection reference for level instruments Bibliography Explanation of wording in this specification