NB/T 47020-2012: Type and specification for pressure vessel flanges

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Scope

This Standard specifies the classification and specification of pressure vessel flanges, the materials of
flanges, studs and nuts, and their matching with the gaskets; it also specifies the maximum allowable
working pressure, technical requirements and marking at all temperature levels.
This Standard is applicable to the flanges of carbon steel and low-alloy steel pressure vessels that the
nominal pressure is 0.25MPa~6.40MPa and working temperature is -70 ℃ ~450℃.

Basic Data

Standard ID	NB/T 47020-2012 (NB/T47020-2012)
Description (Translated English)	Type and specification for pressure vessel flanges
Sector / Industry	Energy Industry Standard (Recommended)
Classification of Chinese Standard	J15
Classification of International Standard	23.040.60
Word Count Estimation	18,111
Older Standard (superseded by this standard)	JB/T 4700-2000
Quoted Standard	GB 150; GB/T 196; GB/T 197; GB/T 539; GB/T 699; GB/T 700; GB 713; GB/T 1801; GB/T 1804; GB/T 3077; GB/T 3098.2; GB/T 3274; GB/T 3985; GB/T 5779.2; GB/T 16938; GB 24511; NB/T 47008; NB/T 47009; NB/T 47021; NB/T 47022; NB/T 47023; NB/T 47024; NB/T 47025; NB
Regulation (derived from)	?National Energy Board Announcement 2012 No.9
Issuing agency(ies)	National Energy Administration
Summary	This standard specifies the classification of the pressure vessel flange, specifications, flange, studs, matching nut and gasket materials and maximum allowable working pressure and temperature levels under, technical requirements and markers. This standa