GB/T 13932-2016 English PDF (GBT13932-2016)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get Quotation: Click GB/T 13932-2016 (Self-service in 1-minute)
Historical versions (Master-website): GB/T 13932-2016
Preview True-PDF (Reload/Scroll-down if blank)

GB/T 13932-2016: Cast Iron Swing Check Valves
GB/T 13932-2016
Cast iron swing check valves
ICS 23.060.50
J16
National Standards of People's Republic of China
Replace GB/T 13932-1992
Iron swivel check valve
2016-08-29 released
2017-03-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People 's Republic of China
China National Standardization Management Committee released
Preface
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 13932-1992 "Universal valve iron swing check valve". This standard and GB/T 13932-1992
In addition to editorial changes, the main technical differences are as follows.
--- canceled the standard name "common valve" words (see cover, home page);
--- modified the scope of application (see Chapter 1,.1992 edition of Chapter 1);
--- deleted Figure 4 (1992 version 3.1);
--- modified the basic parameters (see 3.2,.1992 version 3.2);
- modified pressure - temperature rating (see 4.1,.1992, 4.1);
- modified the diameter of the seat and the diameter of the valve body (see 4.3.7,.1992, 4.3.8);
--- Increased requirements for bypass (see 4.9);
- increased mechanical performance tests (see 5.1);
- increased wall thickness measurement (see 5.3);
- Added inspection rules (see Chapter 6);
--- modified the contents of the logo, supply requirements, etc. (see Chapter 7,.1992, Chapter 6).
This standard is proposed by the China Machinery Industry Federation.
This standard by the National Valve Standardization Technical Committee (SAC/TC188) centralized.
The main drafting unit of this standard. Hefei General Machinery Research Institute, Anhui Fang Xing Industrial (Group) Co., Ltd., Ningbo Amy Ke copper valve
Ltd., Jiangsu Bamboo Valve Co., Ltd., Anhui White Lake Valve Factory Co., Ltd., can be made Albert Tieling Valve Co., Ltd., security
Hui Tongdu Fluid Technology Co., Ltd.
The main drafters of this standard. Huang Mingya, Peng Lin, Jiang Jiaqian, Zheng Xuezhen, Xiao Peng, Chen Jiangshan, Li Yanhui, Zhang Wenbing.
This standard replaced the previous version of the standard release.
--- GB/T 13932-1992.
Iron swivel check valve
1 Scope
This standard specifies the structural and basic parameters, technical requirements, test methods, inspection rules, marking and supply of iron swivel check valves.
Cargo requirements.
This standard applies to the nominal pressure PN2.5 ~ PN25, nominal size DN50 ~ DN1800, the media for the water, the flange connection of gray cast iron and
Ductile iron swing check valve (hereinafter referred to as "check valve").
2 normative reference documents
The following documents are indispensable for the application of this document. For dated references, the only dated edition applies to this article
Pieces. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 152.1 Fasteners - Through Hole for rivets
GB/T 152.2 Fasteners for countersunk head countersunk countersinks
GB/T 152.3 Fasteners for countersinks for countersinks
GB/T 152.4 Fasteners Hex head bolts and countersunk nuts
Metallic materials - Tensile testing - Part 1. Test methods for room temperature GB/T
GB/T 229 Metallic materials Chibi pendulum impact test method
Shapes and position tolerances Not included Tolerance values GB/T 1184-1996
GB/T 1348 ductile iron pieces
GB/T 9439 gray cast iron pieces
GB/T 12220 industrial valve signs
GB/T 12221 metal valve structure length
GB/T 12226 general purpose grease gray cast iron parts technical conditions
Technical specification for ductile iron of general purpose valves GB/T 12227
GB/T 13927 Industrial valves - Pressure test
GB/T 17241.6 Integral cast iron pipe flange
GB/T 17241.7 Technical requirements for cast iron pipe flanges
JB/T 5300 Guide for Selection of Industrial Valve Materials
JB/T 7928 industrial valve supply requirements
Test method for mechanical properties of JB/T 7945 gray cast iron
3 structural type and basic parameters
3.1 check valve structure is divided into single horizontal, multi-valve horizontal, multi-valve vertical, etc., the typical structure shown in Figure 1 to Figure 3.
3.2 The basic parameters of the check valve according to the provisions of Table 1.
Description.
1 --- body seal ring (seat); 5 --- rocker;
2 --- valve seal ring; 6 --- valve cover;
3 --- rocker shaft; 7 --- gasket;
4 --- valve plate; 8 --- body.
Figure 1 rotary single valve horizontal check valve
Description.
1 --- bypass valve; 7 --- rocker shaft;
2 --- baffle; 8 --- rocker;
3 --- body seal (seat); 9 --- body (two);
4 --- valve seal ring; 10 --- valve cover;
5 --- valve plate; 11 --- gasket.
6 --- body (1);
Figure 2 Rotary multi-flap horizontal check valve
Description.
1 --- body; 5 --- gasket;
2 --- valve seal ring; 6 --- partition;
3 --- discs; 7 --- filter.
4 --- pin;
Figure 3 Rotary multi-flap vertical check valve
Table 1 Basic parameters
Nominal size DN
/ Mm
Gray cast iron stop valve Ductile iron check valve
PN2.5, PN6, PN10 PN16, PN25
Single horizontal, multi - flap, double - flap, single - flap, single - flap
50 △ - - - △
65 △ - - - △
80 △ - - - △
100 △ - - - △
125 △ - - - △
150 △ - - - △
200 △ - - - △
250 △ - - - △
300 △ - - - △
350 △ - △ △ △
400 △ - △ △ △
450 △ - △ △ △
500 △ △ △ △ △
600 △ - △ △ -
700 △ △ - - -
800 - △ - - -
900 - △ - - -
Table 1 (continued)
Nominal size DN
/ Mm
Gray cast iron stop valve Ductile iron check valve
PN2.5, PN6, PN10 PN16, PN25
Single horizontal, multi - flap, double - flap, single - flap, single - flap
1000 - △ - - -
1200 - △ - - -
1400 - △ - - -
1600 - △ - - -
1800 - △ - - -
Note 1. "△" means applicable, "-" means not applicable.
Note 2. Vertical check valves are also known as bottom valves.
4 technical requirements
4.1 Pressure - temperature rating
The pressure-temperature rating of the shell material shall be as specified in GB/T 17241.7. Check valve pressure - temperature rating should be used shell and
The pressure-temperature rating in the seal in the valve body is one of the smaller values and shall be indicated on the nameplate.
4.2 working conditions
Horizontal check valves are mainly used in horizontal piping, and when used on vertical pipes, the medium must flow upward. Vertical check valve is available
In vertical pipes.
4.3 Body
4.3.1 flange should be the overall casting with the valve, the connection size and sealing surface shape, size should be consistent with the provisions of GB/T 17241.6.
4.3.2 The length of the structure of the check valve shall be in accordance with the provisions of GB/T 12221 and Table 2.
Table 2 Structural length units in millimeters
Nominal size
DN
PN2.5, PN6, PN10
Short series of long series
1200 1400 2300
1400 1600 2400
1600 1800 2800
1800.2000 3200
4.3.3 The minimum wall thickness of the valve body is in accordance with Table 3.
Table 3 The minimum wall thickness of the valve body and bonnet is in millimeters
Nominal size
DN
Gray cast iron ductile iron
PN2.5 PN6 PN10 PN16 PN25
125 9 10 10 12 12
150 9 10 10 14 14
200 10 12 12 15 15
250 12 13 13 15 -
300 13 14 14 16 -
350 14 15 15 16 -
400 14 16 16 18 -
450 15 17 17 20 -
500 15 18 18 23 -
600 16 20 20 23 -
700 20 24 26 - -
800 20 24 26 - -
900 22 25 28 - -
1000 22 26 30 - -
1200 23 26 - - -
1400 24 30 - - -
1600 24 30 - - -
1800 26 - - - -
Note. The wall thickness of the table is only applicable to gray cast iron HT250, ductile iron QT450-10, the other grades of materials need to be calculated separately.
4.3.4 end flange sealing surface should be parallel to each other, the parallelism according to GB/T 1184-1996 12 precision. End flange bolt hole d0
The deviation of the position of the axis relative to the axis of the flange bore is as specified in Table 4.
Table 4 The degree of deviation is in millimeters
Bolt hole diameter d0 position deviation deviation φt
11.0 ~ 17.5 ≤ 1.0
22.0 ~ 30.0 ≤ 1.5
33.0 ~ 48.0 ≤ 2.6
56.0 ~ 62.0 ≤3.0
4.3.5 nominal pressure for the PN25 check valve body flange and flange should be round, the back should be processed or press GB/T 152.1 ~
GB/T 152.4 provisions of the counterbalance.
4.3.6 The valve body shall be free of any harmful deformation under the test and working conditions of the valve housing, and shall also take into account the impact of the valve on the valve body
Hit factor.
4.3.7 single-valve seat diameter should be equal to the diameter of the valve body, the total area of the valve seat hole should be greater than 1.1 times the diameter area.
4.3.8 Body over-flow area should not be less than the nominal size of the cross-sectional area.
4.3.9 The valve body shall be provided with a mechanism for restricting the opening of the valve flap so that it can be easily closed when the medium is countercurrent.
4.4 bonnet
4.4.1 The minimum wall thickness of the bonnet shall be as specified in Table 3.
4.4.2 The connection between the valve cover and the valve body is flange type, flange sealing surface can be used in the form of flat, other forms should be specified in the order contract.
4.4.3 Check valve with nominal pressure PN25 The flange of the bonnet shall be round and its back should be machined or press the GB/T 152.1 to GB/T 15.4
The provisions of countersink.
4.4.4 The number of bolts (or studs) for the bonnet and the valve body shall not be less than 4.
4.5 seat and disc
4.5.1 seat and the valve body, valve seal and the combination of the valve should be solid, not loose in use, do not fall off, do not leak at the junction.
4.5.2 The sealing surface of the valve body and the valve plate can be machined directly from the valve body and the valve disc, and the sealing ring or other metal can be installed. seal
Surface such as the use of surfacing, after welding layer thickness should be not less than 2mm.
4.6 rocker
Rocker and valve and valve body connection should be flexible rotation, and to ensure that the joystick and the valve body at the connection is reliable, do not fall off in use.
4.7 Filter
Install the filter check valve, filter the total area of the filter hole should be greater than the nominal size of the cross-sectional area of 1.5 times.
4.8 buffer device
According to the user's request, the check valve can be set up various types of buffer device, plus the buffer device, the need to consider the butterfly plate and stem strength
Enough safety factor.
4.9 Bypass
Nominal pressure is not less than PN6 and the nominal size is not less than DN1200 and the nominal pressure is not less than PN10 and the nominal size is not less than
DN800 rotary multi-flap horizontal check valve should be set bypass line.
4.10 material
Check the main parts of the material according to the provisions of JB/T 5300 selected. Gray cast iron should comply with the provisions of GB/T 12226, ductile iron
Shall comply with the provisions of GB/T 12227. Other parts should meet the requirements of their corresponding material standards.
4.11 shell strength and sealing performance
Check valve shell strength and sealing performance, should be consistent with the provisions of GB/T 13927.
5 test method
5.1 Mechanical performance test
5.1.1 Preparation of gray cast iron Specimens According to GB/T 9439, the preparation of ductile iron samples shall be in accordance with the provisions of GB/T 1348.
5.1.2 Mechanical properties of gray cast iron test according to the method specified by JB/T 7945, ductile iron pieces of tensile strength test and impact test
Respectively, according to GB/T 228.1 and GB/T 229 provisions of the method.
5.2 Pressure test
Check the shell strength test and sealing performance test according to the provisions of GB/T 13927 method.
5.3 Shell wall thickness
Measure the wall thickness of the valve body runner, middle chamber and bonnet with a gage or a special caliper gauge.
6 inspection rules
6.1 Test items
Check valve is divided into factory inspection and type inspection, inspection items, technical requirements, inspection and test methods in accordance with the provisions of Table 5.
Table 5 Test items
Test items
identify category
Factory inspection type inspection
Technical requirements Chapter number Test method Article number
Shell strength
Sealing performance √ √
4.11 5.2
Body, bonnet minimum wall thickness - √ 4.3.3,4.4.1 5.3
Mechanical properties of shell material - √ 4.10 5.1
Logo √ √ Chapter 7 Visual inspection
Note. "√" for the inspection items, "-" for the non-inspection items.
6.2 factory inspection
Each check valve must be factory inspection by Taiwan, inspection before passing the factory.
6.3 Type inspection
6.3.1 One of the following circumstances, the prototype should be type inspection, type inspection before passing the production.
A) when the new product is modeled;
B) after the formal production, such as structure, materials, processes have a greater change, may affect the product performance;
C) when the product is discontinued for a long period of time.
6.3.2 normal production, regular or accumulation of a certain amount of production, should be sampled for type testing.
6.3.3 Sampling of type inspection is carried out as follows.
A) The test samples are randomly selected from the inventory products of the manufacturer's quality inspection department. Each sample for the minimum number of samples and
The number of sampling units is in accordance with Table 6.
B) The test sample can also be taken from the user. From the user has been provided but not used and keep the factory state of the product randomly selected, the most
The number of units is not limited by Table 6, the number of sampling units are still in accordance with the provisions of Table 7.
C) the entire series of product quality assessment, according to the size of the series range from the pumping of 2 to 3 typical specifications for testing,
The minimum number of samples for each specification and the number of sampling uni...