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Database: 189759 (19 Oct 2025)
HG/T 20559-1993 English PDF
HG/T 20559: Evolution and historical versions
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HG/T 20559-1993
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(Appendix piping instrumentation diagram design requirements: the basic unit of pipeline instrumentation diagram mode)
HG/T 20559-1993
HG/T 20559.1-1993
English
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(Provisions piping and instrumentation diagram design content pipeline depth instrumentation diagram design requirements)
HG/T 20559.1-1993
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Basic data
Standard ID
HG/T 20559-1993 (HG/T20559-1993)
Description (Translated English)
(Appendix piping instrumentation diagram design requirements: the basic unit of pipeline instrumentation diagram mode)
Sector / Industry
Chemical Industry Standard (Recommended)
Classification of Chinese Standard
P72
Classification of International Standard
71.01
Word Count Estimation
422,438
Summary
This standard applies to piping rating on the PI diagram connecting pipes between the device label. When connected with a pipe or pipes when there are different levels to determine the level of the demarcation point or pipe pipeline insulation, thermal insulation and mark the location of the demarcation point. The control valve downstream piping, valve inlet and outlet pipes, the trap, exhaust downstream piping, static equipment and rotating equipment connecting pipes, drain pipes and tubes of grade boundaries and mark the position of the net.