GB/T 12220-2015 English PDF (GBT12220-2015)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get Quotation: Click GB/T 12220-2015 (Self-service in 1-minute)
Historical versions (Master-website): GB/T 12220-2015
Preview True-PDF (Reload/Scroll-down if blank)

GB/T 12220-2015: Industrial valves -- Marking
GB/T 12220-2015
Industrial valves. Marking
ICS 23.060.01
J16
National Standards of People's Republic of China
Replacing GB/T 12220-1989
Industrial Valve logo
Issued on. 2015-05-15
2016-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
This standard replaces GB/T 12220-1989 "Universal Valve logo", this standard compared with GB/T 12220-1989, Technical
Changes are as follows.
--- Modify the standard name;
--- Modify the original mark list, which is divided into Table 1 (must use the logo) and Table 2 (other signs), so that the content of the project marked a clear
Specifically, in line with relevant laws and regulations of the need;
--- The original "pressure parts material code" to "Body Material designation" and "bonnet material designation";
--- Increasing the applicable media, paired sealing material grades, flow coefficient, the maximum allowable working pressure, operating pressure reducing valve import and export terminal
Force range, set pressure, flow area or runner diameter, rated displacement or rated discharge coefficient, opening height and other signs and special classes
Type valve labeling information;
--- Remove and test the quality of marking, inspectors imprint;
--- Increased labeling requirements and common logo;
--- Not less than the original marks and greater than DN50 DN50 sign modified to not less than DN32 mark of greater than DN320
Mark.
This standard uses redrafted law revision adopts ISO 5209-1977 "General Industrial Valve logo" (in English).
This standard and ISO 5209-1977 as compared to the structure have more adjustments in the content added some new content. The main technical difference
Differences are as follows.
--- Increasing the normative references and corresponding reference;
--- Increased labeling requirements;
--- Increased adjustment valves, valve type, valve type characteristic parameters flag;
--- Not less than the original mark and less than DN50 DN50 sign changed to not less than DN32 mark of less than DN320
Mark.
The standard proposed by China Machinery Industry Federation.
The standard valve by the National Standardization Technical Committee (SAC/TC188) centralized.
This standard was drafted. Hefei General Machinery Research Institute, Ningbo Ai Ke US copper valve Co., Ltd., Hefei General Machinery Products Inspection Institute, Branch
Fu Lung Valve Co., Ltd., Anhui Xing Fang Industry (Group) Co., Ltd.
The main drafters of this standard. Liu Xiaochun, Zhengxue Zhen, Wang Xiaojun, Yu Jinliang, Fangzuo Sheng.
This standard previously issued as follows.
--- GB/T 12220-1989.
Industrial Valve logo
1 Scope
This standard specifies the content of the flag and labeling methods of industrial valves.
This standard applies to industrial metal valves. If this standard valve product standards and inconsistent with the requirements of the valve product standards prevail.
Other valves may refer.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 1047 pipe element DN (nominal size) of the definition and selection (GB/T 1047-2005, ISO 6708.1995,
MOD)
GB/T 1048 conduit elements PN (nominal pressure) of the definition and selection (GB/T 1048-2005, ISO /CD7268.1996,
MOD)
GB/T 7306 (all parts) 55 ° sealing pipe thread (GB/T 7306.1 ~ 7306.2-2000, eqvISO 7-1.1994)
GB/T 7307 55 ° non-sealing pipe thread (GB/T 7307-2001, eqvISO 228-1.1994)
GB/T 9113 Integral steel pipe flanges
GB/T 12716 60 ° sealing pipe thread
3 content of the flag
Flag 3.1 valve must be used
Nominal flag measuring not less than DN32 valves must be used in Table 1.
Table 1 mark must be used
Project logo Project logo
1 Nominal size DN or NPS 7 bonnet material molded casting or forging furnace No. Lot
Product standards 2, PN or pressure level Classa 8 basis
Make 3 or trademark of the manufacturer of the medium allows flow c 9
4 Body material grades b 10 hand wheel or lever hoist flag
5 Body material molded casting or forging furnace Lot No. 11 manufacturing year, month
Bonnet Material Grade 6 b
a power station valve can be marked and the maximum use temperature corresponding to the maximum allowable working pressure, such as P54100.
b copper alloy, aluminum alloy body, valve cover material grades may not be marked, material grades shall be marked on the nameplate.
c-way valve must be marked to allow media flow arrows.
3.2 Valve other signs
Valve other flags in Table 2.
Table 2 Other signs
Project logo Project logo
1 valve models, specifications 11 Flow Coefficient
Valves maximum use temperature (℃) and the corresponding maximum allowable
Working Pressure (MPa); or the lowest temperature (℃); or
Operating temperature range
12 station number
3 Maximum allowable working pressure (MPa) 13 Maximum allowable working pressure
4 inlet end manufacturer part number or lot number 14 the relief valve, the outlet end of the working pressure range
5 paired sealing material grades 15 thread code
The main piece of material within 6 grades (valve stem) 16 set pressure
7 flange ring 17 or the flow area of the flow channel diameter
8 lining material grades 18 Nominal displacement or rated discharge coefficient
9 Medium 19 opening height
10 Flow Characteristics
Note 1. Item 7 applies to the annular sealing flange valve.
Note 2. item 8 applies lined valves.
Note 3. item 10 to 11 adapted to control (adjust) valve.
Note 4. item 13 apply to limit the working pressure of the valve.
Note 5. Item 14 applies pressure reducing valve.
Note 6. items 16 to 19 apply to the safety valve.
3.3 marking requirements
The specific requirements of the following signs.
a) Nominal pressure should be consistent with GB/T 1048 requirements;
b) The nominal size should be consistent with GB/T 1047 requirements;
c) Press the flange ring number GB/T 9113 regulations;
d) threaded code by GB/T 7306, GB 7307 regulations/T and GB/T 12716; and
e) marking plate material and plate fixation methods should be resistant to environmental corrosion, and with the use of the valve temperature to adapt;
f) mark on the body and nameplate signs should be clear, obvious, neat, well-balanced, easy to identify;
g) located in the body of any one of the flags to be repeated provided on the nameplate.
4 labeling method
4.1 General mark
Nominal size is marked as "DN value", the nominal value of direct labeling, omit code "PN" 4.1.1 on the body; the public on the body, said
Size, pressure level tag values directly, omitting the code "NPS" and "Class"; there are special requirements of the valve in accordance with contract requirements.
4.1.2 end flange ring for the connection shall be marked on the corresponding outer flange ring number.
4.1.3 the threaded end of the valve, on the ends of the outer edge labeled screw type codes, such as Rp, Rc and the like.
4.1.4 should be located on the hand wheel or handle to indicate the direction of the arrow and open and close the valve plus "off" or "on" or "CLOSE" or "OPEN" and so forth.
4.2 nominal size of not less than DN32 valves flag
4.2.1 Table 1, Item 1 to 5 shall be permanently marked on the valve body, the project should be permanently marked 6,7 items in the bonnet. Valve body,
Cover castings or forgings, marked with the valve body, valve cover while casting or forging molding, embossing method may also be labeled or not using the Movies
Direct processing of steel or welding sheet metal forming the valve, can imprint method; other permanent marking method affect the valve housing properties
Mark, or by other permanent marking method does not affect the performance of the valve casing.
4.2.2 Table 1, Item 1 to 4,6,8,11 items should be marked on the nameplate. Project 5,9 items marked on the valve body, the project marked the bonnet 7
, The project 10 mark on the hand wheel or handle.
4.2.3 Table 2 items 1 to 19, according to the characteristics of the valve requirements marked on the nameplate or valve body.
4.3 nominal size DN32 valves flag
4.3.1 Table 1, item flag must be 1 to 4 should be marked on the body and nameplate.
4.3.2 Table 1, Item 5 to 11 and Table 2, items 1 to 19, when the flag is restricted to cut, marking method according to 4.2.2 - 4.2.3
Provisions.
4.4 notation
May be needed, attach any signs, but not in Table 1, Table 2 flag confusion.