HG/T 20637.2-1998Symbols and identifiers for engineering design of instrumentation (English PDF)
自控专业工程设计用图形符号和文字代号
HG/T 20637.2 | Evolution and historical versions
| Std ID | Title | Status |
|---|---|---|
| HG/T 20637.2-2017 | Symbols and identification for instrumentation engineering design | Valid |
| HG/T 20637.2-1998 | Symbols and identifiers for engineering design of instrumentation | Obsolete |
HG/T 20637.2-1998 is obsolete. It has been replaced by HG/T 20637.2-2017. This page sells the obsolete edition, for projects and contracts that still cite it.
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Issued by
State Bureau of Petroleum and Chemical Industries
Level / Type
Industry · Recommended
Issue date
June 22, 1998
Implementation date
January 1, 1999
Scope
HG/T 20637.2-1998 is the English-translated version of 自控专业工程设计用图形符号和文字代号.
HG/T 20637.2-1998 is the Chinese industry standard "Symbols and identifiers for engineering design of instrumentation". It was issued on June 22, 1998 by the State Bureau of Petroleum and Chemical Industries, and took effect on January 1, 1999. It is obsolete: it has been replaced by HG/T 20637.2-2017.
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Document preview — HG/T 20637.2-1998
National Standard of the People's Republic of China
Issued by: State Bureau of Petroleum and Chemical Industries
Contents
- Document data
1 Document data
Sector: Chemical Industry (industry standard).
Issuing body: State Bureau of Petroleum and Chemical Industries.
Date of issue: 1998-06-22.
Date of implementation: 1999-01-01.
Status: obsolete, replaced by HG/T 20637.2-2017.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — all pages — is available in the English PDF.
Referenced standards
Cited by
- HG/T 20636.6-2017Code for design management of instrumentation for chemical plants - Checklist for checking and review of instrumentation engineering design documents
- HG/T 20637.1-2017Code for preparation of engineering design documents of instrumentation for chemical plants - Composition and preparation of instrumentation engineering design documents
- HG/T 20637.8-2017Code for preparation of engineering design documents of instrumentation for chemical plants - Numbering of instrument auxiliary equipment and cables
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Related Standards
HG/T 20637.3-2017 — Code for preparation of engineering design documents of instrumentation for chemical plants - Preparation of instrumentation design regulations
HG/T 20637.1-1998 — Composition and preparation for engineering documents of instrumentation
HG/T 20637.3-1998 — Preparation of instrumentation engineering specification
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HG/T 20637.2-1998
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