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This post was last edited by lotos1987 on 2022-5-29 at 16:57. I work in the instrumentation and control field at a top-tier design institute, where I am involved in designing systems for the power industry as well as for a specific chemical industry. A few days ago, I organized the standards on my computer and created a small directory to share with everyone for reference. Since these are all specifications that are relatively easy to download, I won’t attach them one by one here. Of course, the specifications can’t be completely exhaustive; they serve as a starting point, and any additions are welcome. Terminology: HGT 20699 – Common terms and terminology used in automatic control design. Drawing specifications: GB/T 14689-1993 – Sheet sizes and formats for technical drawings; GB/T 14690-1993 – Scales for technical drawings; GB/T 14691-1993 – Fonts for technical drawings; GB/T 4458.4-2003 – Rules for dimensioning in mechanical drawings; GB/T 14665 – Rules for CAD drawing in mechanical engineering. DLT 5026-1993 – Technical regulations for computer-aided design in power engineering; DLT 5028.1 – General rules for drawing standards in power engineering; DLT 5028.2 – Mechanical aspects of drawing standards in power engineering; DLT 5028.3 – Electrical, instrumentation, and control aspects of drawing standards in power engineering; DLT 5028.4 – Civil engineering aspects of drawing standards in power engineering; DLT 5229-2016 – Regulations on preparation of as-built drawings in power engineering; GB/T 50001-2017 – Unified standards for architectural drawing. Design content and depth: In the power sector, DLT 5461 specifies the required depth of content in construction drawings for thermal power plants. GB 50660-2011 provides design standards for medium- and large-sized thermal power plants. In the chemical industry, HGT 20637.1-1998 outlines the composition and preparation of engineering documents for automatic control; HGT 20637.2-1998 covers graphical symbols and codes used in such documents; HGT 20637.3-1998 deals with preparation of instrument design specifications; HGT 20637.4-1998 addresses requirements for instrument installation; HGT 20637.5-1998 relates to preparation of instrument purchase orders; HGT 20637.6-1998 covers preparation of instrument technical manuals; HGT 20637.7-1998 involves calculation of materials needed for instrument installation; HGT 20637.8-1998 deals with numbering of auxiliary equipment, cables, and pipes related to instruments. HGT 20638-1998 (reviewed in 2017) specifies the required depth of content in engineering documents for automatic control. HGT 20519.1-6-2009 provides unified standards for content and depth of construction drawings in chemical process design. HGT 20549.1-1998 specifies content and depth requirements for pipeline layout design in chemical plants. Responsibilities of automatic control/instrumentation specialists and their division of labor with other disciplines: HGT 20636.1-1998 defines the scope of responsibilities of automatic control specialists; HGT 20636.2-1998 describes their relationship with process and systems engineers; HGT 20636.3-1998 covers their division of labor with piping engineers; HGT 20636.4-1998 deals with their collaboration with electrical engineers; HGT 20636.5-1998 relates to their cooperation with telecommunications, pump, and safety/fire protection specialists; HGT 20636.6-1998 outlines tasks involved in automatic control engineering. Design process: HGT 20636.7-1998 describes procedures for automatic control engineering; HGT 20636.8-1998 covers quality assurance procedures; HGT 20636.9-1998 provides guidelines for reviewing engineering documents; HGT 20636.10-1998 deals with document control procedures. PID diagram design: GB 2625-1981 specifies graphical symbols and codes for process measurement and control diagrams; HGT 20505-2014 covers functional markings and symbols for process measurement and control instruments. Instrument selection and performance: SHT 3005 provides design standards for selecting automation instruments in petrochemical industries; HGT 20507 offers similar standards for automation instrument selection. GB/T 1226-2017 covers general pressure gauges; GB/T 27505-2011 relates to pressure controllers; GB/T 28474.1-2012 and GB/T 28474.2-2012 provide technical specifications and performance evaluation methods for pressure and differential pressure transmitters used in industrial processes. JBT 2802-2008 (now obsolete) pertains to pressure controllers; JBT 9252-1999 and JBT 9253-1999 cover basic types, dimensions, and technical requirements for indicators in industrial automation instruments; JBT 9274-1999 deals with diaphragm pressure gauges; JJG 544-2011 and JJG 882-2019 provide calibration procedures for pressure controllers and transmitters respectively. GB/T 2624.1 and GB/T 2624.2 describe methods for measuring flow rates using differential pressure devices installed in circular pipes. DCS design: GB/T 36293-2018 specifies technical requirements for distributed control systems in thermal power plants; HGT 20573 provides design standards for distributed control systems; SHT 3092 offers similar standards for petrochemical industries. DLT 1083 outlines technical requirements for distributed control systems in thermal power plants; GB/T 50770 provides design standards for safety instrumented systems in petrochemical industries; HGT 20511 covers design standards for signal alarms and interlock systems; HGT 20700 deals with programmable logic controller system design. Document No. 116 issued by the State Administration of Work Safety provides guidance on managing safety instrumented systems in the chemical industry. Document No. 116 also lists the first batch of hazardous chemical processes requiring special supervision; Document No. 3 lists a second batch of such processes and makes adjustments to certain processes listed in the first batch