What are the latest standards and specifications currently in use for instruments?

You can refer to this post: http://bbs.hcbbs.com/thread-352714-1-1.html

Code for Construction and Acceptance of Automated Instrument Installation Projects GB50093-2002

Standards and Specifications for Engineering Design in the Field of Automation 1.1 Requirements for the Depth of Content in the Preliminary Design of Chemical Plants 1.2 Supplementary Provisions on Changes to the Requirements for the Depth of Content in the Preliminary Design of Chemical Plants 1.3 Requirements for the Depth of Content in the Construction Drawing Design for Automation (HG 20506) 1.4 Regulations for the Engineering Design of Automation Systems in Chemical Plants (HG/T 20636–20639) 1.4.1 Regulations for the Design Work in the Automation Field (HG/T 20636) 1 Scope of Responsibilities in the Automation Field (HG/T 20636.1) 2 Relationship between the Design Tasks of the Automation Field and Those of the Process and System Fields (HG/T 20636.2) 3 Division of Design Tasks between the Automation Field and the Piping Field (HG/T 20636.3) 4 Division of Design Tasks between the Automation Field and the Electrical Field (HG/T 20636.4) 5 Division of Design Tasks between the Automation Field and the Telecommunications, Pumping, and Safety (Fire Protection) Fields (HG/T 20636.5) 6 Tasks in the Engineering Design of the Automation Field (HG/T 20636.6) 7 Procedures for Engineering Design in the Automation Field (HG/T 20636.7) 8 Quality Assurance Procedures for Engineering Design in the Automation Field (HG/T 20636.8) 9 Summary of Review Requirements for Engineering Design Documents in the Automation Field (HG/T 20636.9) 10 Control Procedures for Engineering Design Documents in the Automation Field (HG/T 20636.10) 1.4.2 Regulations for the Preparation of Engineering Design Documents in the Automation Field (HG/T 20637) 1 Composition and Preparation of Engineering Design Documents in the Automation Field (HG/T 20637.1) 2 Graphic Symbols and Text Codes Used in Engineering Design in the Automation Field (HG/T 20637.2) 3 Preparation of Regulations for Instrument Design (HG/T 20637.3) 4 Preparation of Requirements for Instrument Installation (HG/T 20637.4) 5 Preparation of Instrument Purchase Orders (HG/T 20637.5) 6 Preparation of Instrument Technical Specifications (HG/T 20637.6) 7 Inventory of Materials Used for Instrument Installation (HG/T 20637.7) 8 Numbering of Auxiliary Equipment, Cables, and Pipelines for Instruments (HG/T 20637.8) 1.4.3 Requirements for the Depth of Content in Engineering Design Documents in the Automation Field (HG/T 20638) 1.4.4 Typical Charts and Standard Catalogs for Engineering Design in the Automation Field (HG/T 20639) 1 Typical Tables Used in Engineering Design in the Automation Field (HG/T 20639.1) 2 Typical Condition Tables Used in Engineering Design in the Automation Field (HG/T 20639.2) 3 Standard Catalogs Used in Engineering Design in the Automation Field (HG/T 20639.3) 1.5 Regulations for the Engineering Design of the Process Systems in Chemical Plants (HG 20557–20559) 1.5.1 Regulations for the Management of Process System Design (HG 20557) 1.5.2 Requirements for the Content of Process System Design Documents (HG 20558) 1.5.3 Regulations for the Design of Piping and Instrumentation Diagrams (HG 20559) 1.6 Requirements for the Content of the Preliminary Design of Petrochemical Plant Foundations (SHSG-033) 1.7 Guidelines for the Depth of Construction Drawings in the Engineering Design of Automation Systems in Petrochemical Plants (SHB-Z01)