This standard specifies the requirements, test methods, and determination of the number of static pressure life tests for industrial plug valves. JB/T 8860-2004 Plug valve static pressure life test procedures JB/T8860-2004 Standard download decompression password: www.bzxz.net

ICS 23.060.20
Machinery Industry Standard of the People's Republic of China
JB/T8860-2004
Replaces JB/TB60:1999
Plug valve
Static pressure life test procedure
Plug yalve-potential pressure life test regulation2004-03-12Promulgated
Implementation on 2004-08-01
National Development and Reform Commission of the People's Republic of ChinaPrevious issue
Normative document
3 Unevaluated and defined
4 Requirements
5 Test method
Determination of the number of static pressure life test
G Termination test..
6.2 Number of static and potential life tests
Record 4 "Informative record!" Test record
Figure 1 Principle of static pressure life reduction test system
......
Table A.1 Data record of static pressure life test of cold valve
J0/T 8860-2004
JB/T8602004
This standard is a revision of JB/T88601999 "Regulations for static pressure life test of rotary valves". Compared with B/T8860-1999, the main changes of this standard are as follows: the scope of application of the standard has been increased, and it is applicable to the drop pressure life test of various types of rotary valves: reference standards have been added:
-... The requirements on valve opening, test pressure, test pressure difference, torque control, etc. in the test requirements have been modified; the operation adjustment of the test method has been supplemented. This standard replaces B860-1999
Appendix A of this standard is an informative annex
This standard is proposed by the China Machinery Industry Federation. This standard was issued by the National Valve Standardization Technical Committee (SACTC1 Appendix) and is under the jurisdiction of the Hefei General Machinery Research Institute and the Ningxia Quality and Technical Supervision Bureau. The main drafters of this standard are Wang Xiaojun, Liu Xiaotao, Zheng Qingxuan and Wang Maozhong. This standard replaces the previous standards JB/22451985, JB/T8860--1999
1 Scope
Standard for static pressure life test of plug valves
JB/T8860-2004
This standard specifies the requirements, test methods and determination of the number of static pressure life tests for industrial plug valves. This standard is applicable to static pressure life tests of plug valves with a nominal pressure of PNs10.0MPa: 2 Normative referenceswwW.bzxz.Net
The clauses in the following documents become the clauses of the standard through reference in this standard. For all the referenced documents with a specified period, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, it is encouraged to use the technical standards The parties to the agreement shall study whether the latest version of this document can be used. For undated reference documents, the latest version shall apply to this standard. GB/13927-1992 General valve pressure test (neIS0520B: 1982) JB/T9092-1999 Inspection and testing of valves 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Static pressure life test patentdlalpressureifetes Under laboratory conditions, the valve is subjected to medium pressure and is subjected to a cyclic operation test from fully open to fully closed. 3.2
Static pressure life test times Limrofpotendalpressurelifetes tThe total number of switch cycles that can maintain the performance required by the standard when the valve undergoes a static service life test is 4 Requirements
4.1 The sealing performance of the plug that needs to undergo a static service life test shall comply with the requirements of GB13927 or JBT9092. 42 The test system principle diagram of the static pressure life test is shown in Figure 1. Source
1-Reciprocating home! 2---Pressure gauge: 3-
One pressure change capacity; 4-
Water supply: 5-
Gas network: (
Driving mechanism: 8--Tested valve: 9-Pressure gauge after the valve: 10-Pressure gauge before,
One drop pressure relief network,
Two rear control valves: 11-
Figure 1 Principle of static pressure test system
JB/ T88602004
4.3 The test medium is water at room temperature: The test medium uses air. The opening pressure difference during the test should be controlled according to the rated pressure difference of the valve. 4.4 The non-rush valve is operated in a certain way. When conducting the static discharge test, the operating device equipped with it shall be carried out together with the valve for opening and closing cycle test. The weak-motion mechanism of the dynamic plug valve shall be directly driven by a mechanical (wheel) or driven by a worm gear seat structure: The handwheel of the worm gear reduction mechanism: The plug valve shall be driven by an electric, pneumatic or other electro-hydraulic linkage device. The operating device equipped with it shall drive the plug valve for opening and closing cycle test. 4.5 During the static pressure life test, starting from the fully closed position, the height of the valve shall be selected to its actual opening. 4.B Static pressure life test: from the open position to the closed process, the body cavity should be filled with medium without being carried out, the medium pressure should be 90%-1% of the valve's rated pressure, after reaching the closed position, the medium pressure should be released on the outlet side. The load-carrying plug valve is designed under the following three conditions of the test medium: When the rated pressure difference is required, the rated pressure shall be used as the test pressure difference during the test; 4.7 During the test, the control opening position shall be output, and the repetitive deviation of the grip position shall be less than 1”; 4.8 During the test, the maximum opening and closing force obtained by the tight operation test shall be used for operation. The operating torque shall not exceed the torque that the drive wheel equipped with the plug can produce or the operating torque specified in the product standard. The repetitive error of the test output force of the drive wheel shall be less than ±%.
4.9 During the static pressure life test, the sealing performance and operating torque shall be checked once every 200-300 opening and closing cycles based on the characteristics of the operating and sealing pair materials. After the sealing performance is qualified, continue the test: For manually lifted valves, if the operating force changes greatly, it can be weakened; for plugs operated by other media, a skilled person shall be employed To be adjusted. 4.10 If the plug valve has flow installation requirements, it should be installed with the required flow. 4.11 The record of the number of static pressure life tests should be recorded by an electric counter based on the signal provided by a life tester or an electric hydraulic, pneumatic or other feedback air linkage device driven stability meter. 5 Test method
5.1 Install the plug valve and determine the position requirement when closing the plug valve. 5.2 Under the conditions of 1U0% differential pressure and special pressure (or rated pressure difference), use a force gauge to measure the maximum operating torque when opening and closing the plug valve. Check three times and take the maximum value. 5.3 Adjust the opening and closing position and output torque of the drive mechanism. 5.4 After 200 to 300 opening and closing cycles, check the leakage of the seal. If the operating torque changes, the output torque of the drive mechanism should be adjusted in time to meet the sealing requirements. However, when the operating torque changes, the output torque of the drive mechanism should be adjusted in time to meet the sealing requirements. When the torque increases to the point where one person cannot operate the valve with the handwheel, the test is stopped. 6 Determination of the number of static pressure life tests
6.1 Cross-stop test
When the following situations occur, the test is completed:) During the tightness test inspection: The sealing performance cannot meet the standard requirements: h) The valve stem cannot maintain a seal, other parts of the valve body are leaking, etc.; c) The valve stem, valve sleeve and other parts are worn, and cannot be opened and closed normally, or the opening and closing operating torque changes greatly. It does not comply with the provisions of 4.8 of this standard.
6.2 Number of static pressure life tests
6.2.1 After reaching the required number of tests, if the performance of the plug meets the standard requirements, this test number shall be used as the static life test number. 6.22 If during the test, abnormal conditions occur or the performance does not meet the standard requirements, the corresponding opening and closing times of the inspection shall be stopped. The number of cycles is the number of static pressure life tests.
Manufacturer
Product name
Nominal life
Appendix
Informative appendix)
Test record
A.1 Static pressure life test data record of valves Model, specification
Pressure of each sealing member
Before the test, the sealing performance of the operating mechanism during operation is tested! (poor)
Test personnel:
Life
Test change
MPaF, opening and closing torque
Stight average performance
Test record
Operating torque
Situation of other parts
IB/T8860—2004
Inspection date
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