GB/T 12224-2015: General requirements for industrial steel valves

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Scope

This Standard specifies the pressure-temperature rated values, materials,
design requirements, inspection and test, markings of steel valves, and
requirements for special pressure level valves and defined pressure level
valves.
This Standard applies to flanged, threaded and welded valves, as well as clip-
on valves and valves for single flange installation, of which the pressure-
bearing members are made using the materials given in Table 1A and Table 1B;
the valve body is made by casting, forged rolling, rolling and assembling-
welding. This Standard includes valves of which the nominal pressure is Class
series and PN series. The range of steel valve parameters to which this
Standard applicable is.
a) The pressure level of Class series valves is Class150 ~ Class4500, of
which Class4500 only applies to welded valves; the pressure level of PN
series valves is PN2.5 ~ PN400;
b) The nominal size of flanged valves is not greater than DN1250;
c) The nominal size of socket welded valves and threaded valves is not
greater than DN65;
d) The rated temperature of threaded valves is not greater than 538 °C, the
pressure level is not greater than Class2500;
e) Flanged valves only apply to standard pressure level and does not apply
to special pressure level and defined pressure level valves;
f) Flanged valves have no intermediate pressure rated values.

Basic Data

Standard ID	GB/T 12224-2015 (GB/T12224-2015)
Description (Translated English)	General requirements for industrial steel valves
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	J16
Classification of International Standard	23.060.01
Word Count Estimation	167,165
Date of Issue	2015-12-10
Date of Implementation	2016-07-01
Older Standard (superseded by this standard)	GB/T 12224-2005
Regulation (derived from)	National Standard Announcement 2015 No.38
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China