Some standard content:
The Mechanical Industry Standard of the People's Republic of China
JB/T 8473-96
Instrument Valve Group
1996-09-03 Issued
Ministry of Machinery Industry of the People's Republic of China
1997-07-01 Implementation
JB/T B473
Only Instrument Valve Group is an indispensable valve product for the fluid pipeline regulation system used in conjunction with transmitters, positive force instruments, etc., for measuring the quantity, pressure, regulation and commercial use of fluids. It is widely used in industrial enterprises such as petrochemicals, chemical industry, electric power, and metallurgy. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the Enterprise Standardization Technical Committee. The unit of this standard is Shanghai Chuanyi Valve Factory. The main drafters of this standard are Xuemei,
1. Use
Machinery Industry Standard of the People's Republic of China
Instrument valve group
JB/T8473-96
This standard specifies the classification, model, structure type, technical requirements, test methods, inspection specifications and standards of a valve group (a simple valve group). This standard uses a nominal pressure of PN3, a minimum MPa, a cup diameter of TN6m, an external flow channel diameter of 4~5), a temperature of?, a working value of ?, various calibration methods for pure gases and liquids, and a ferrule pattern according to the corresponding idle line..2. "Use of standards"
The following standards contain the items that are quoted in this standard and are not included in this standard. All versions of this standard are valid in all states and regions of publication. Any revision will take effect. All parties using technical standards should consider using the latest version of the standard as much as possible: GB1S6B1
GR132C-92
G6 3CA682
G3 713-55
fRTS0R87
GB131-38
K12224-
GB 1222X-69
GT1929R
GB123C-89
GB122J:39
C12252-89
G1/12716-91
JB/T7746$5
ZB J15 W6-SC
3 standard
General size (diameter 1~600mm)
General tolerance and matching (diameter 1~355mm) High-quality carbon steel structural steel technical parts
Stainless steel
High-grade stainless steel
Opening press after four-stage Ruishu products
Feather burning effect Sealing effect
New production method "non-temperature grade
Manufacturer door and stock requirements
General valve! Carbon steel forging parts
Application door carbon steel special parts requirements
Di Tao door austenitic steel parts technical requirements
Manufacturer casting steel parts external quality requirements
General door supply requirements
Valve Soft seal packing ring technical conditions cabinet door sliding degree and wine Zongfang
Reading door test and inspection
This standard adopts the following definitions.
Only two groups: two or more load-bearing reading groups. Valve groups and measuring instruments are matched. The specification is an instrument reading group. 4 Classification, model and structural type
Approved by the Ministry of Machinery Industry in 196-00-03
Implementation in 1497-07-0
41.! The number of groups or reading groups is as follows:) two valve groups
b) three valve groups:
e) five valve groups.
4.1.2 The same item is divided into; a) Golden vortex seal, refers to Golden screen Golden wind!
》Non-net step refers to Golden Guo Non-Golden Cheng".
4.1.3 Connection box, when the end of the flow type is divided into:? Through-plate connection flange type:
) Connection-method type:
Double type:
: 1) Double flange type:
Operation support,
4.2 Model
JD/T $17396
The model of the valve group must be compiled in accordance with the standard: 4.3 Qingzhong type
Read the group model structure type see the following Figure 17. When the case is purchased, the type of element diagram H~10. The flange rate is not small" Figure 11. The size of the wine is in accordance with Table 1.
Note that the material of the non-metal layer is used for the public, that is, 2MP·into and yard, liquid fertilizer field, size production can be ordered, mountain juice clear,
JD/T $473-96
1 one main one throw single wear plate press clever flash
Figure 1M274W-160.52C Xujian bone-flange two-read group Xinyuan
NPT1/2
Xiao Yan: 2 row number network
Figure Maa1w-1ec
threaded A read group
usability
JB/T B47396
1-inspection: left medical 3 Hengrun right network
Figure 3M35sw-160.32n-47,:4,61,36/e2 and connection type three-plate group
1 one left: 2 one: 3 half balance defense: 4 one grid: 3 one input connection example M.IF1W G1, 160, 320, 220-54 pipe-head lambda-test set JB/T 8473-6
2 1 left 1 no interval
Figure N3W-16C,320,420-5 double flange type reading group shoot people take over the next standard two five editions: hospital rush: 5 Figure buy 6M5f4W130.280-A-35/54 press pipe - law = type three valve group EE
JI8H17396
1 left through 2: half balance 13 right piece 14,3±, right sewage 16,? (wheel people) through bottle mechanical section 19.3 (sewage) through plate connection general figure 7571W-16G390-26/54 zero plate connection - send flange type positive valve group figure 8 spherical metal seal to
two-sided non-metallic sealing pair
9 push surface gold exhibition seal
Figure 1 Flange seal structure
Product: Name
Through-standard pipe-method
Flange type two-way assembly"
M274W-16J
M274W-320
Screw-effect two-way assembly"
M227W-160
Mx66w-169-47
66-20-7
:w-16t-4
Connection type
Three volumes"
Concubine Ken-flange type
Number of flange types
Pipe-flange type
Set up the connection camp-dynamic
From the above, we can know
X66W F2r 54
x5G-1o
M356 3: 61
M366-1iG-36/62
M366W-320-36/62
M$r464-5d
MSEW-160-5:
M3t:W-4201
M344W1354
M3+1W-32351
M344W 420 54
M361F-160-A-35/5
M561W-520-A-55/54
w:7aW-16u-.h/51
Y524w-22h.46/54
JE/847396
Table 1 Connection size of the reading group
Single end
Description type
Through pipe
External screw rubber
Just wear the board
NPTI/?
Energy type
Strong output increase
1) This flash group is used for protection (effective moisturizing) and shrimp fruit use. It does not need to wear the board when broadcasting. The name is changed to "Express-compensation type". 2) This group specification is for belt-out specification connection. If the user has special requirements, it can be indicated in the order form. 15
5) A energy-reducing group has the conditions shown in the connection operation. If a single user does not need to shoot into my width, the continuous exhaustion release is and = 1 or N125. Technical requirements
5.1 The material requirements for age control should meet the requirements of Table 2. Name fee
20.25.3e.85.wA.ww
JB/T 8473 -56
Table 2 Sanpo parts materials
gNi..rN-aMzXSi5.IC..Ni2Mu
GIC:r.xN.9Ti.ZGICr:xN..2MuTi.CF&.CF8M19||tt| |1 1XN9ri, tt:YN:2M..tCt18N2Mu2T26.55.4:.35
XNti.N.xNMi.cM
2Cr13.313,T15.&C.r1N5,X rEX,-1YNt2.JC.NTI7NEE2Ma2.K:r1XN12Mn.1.PIFE: SM03126.25.3G.3:
X19N9,1: r.xN:9.1,0 18N12M:1i. cCr1Ni1Mu3: 2623
118N9,r.NH,C1#i12M:2T,tCt.N:12M2PT: M21
CNaN,1N12MEr:N12Ms|| tt||5.2 valve body
GR12229
G12336
GB 3uBr
GD1220
J3/T G517
3.2.1PN16.0MP group uses false extension position, PN16.rMP: read the red can be used fine holding proper or limited reputation A body, Fran! The valve parts can be made into one,
5.2.2PN product 32.CMPa idle volume chamber thickness GB122 is based on the implementation of PN232.MP: the product thickness of the two bodies should be greater than the exciting channel specified in GB12324.|| tt||5.2.3 The operation of the direct connection between the flash body and the transmitter shall be carried out in accordance with the provisions of K7335 or (T/2716): the British standard for the connection between the flash body and the transmitter shall be in accordance with GB106. 5.2.4
The connection between the external and the future should be equipped with anti-loosening single or anti-pole pins to prevent the fiber from being thrown and the resulting damage. The effective length of the valve cover and the valve body and the steel rod should not be less than 1/3 of the diameter of the pipe. The degree of extraction shall not be less than the H/6 level specified in [1. The two rods and the adjustment can be integrated into one piece or separated into two pieces. The assembled valve should be able to rotate when the flow is required, and the closing rate can be adjusted. )
5.3. The wide surface of the bottle and the two seats should have appropriate hardness, 10TRC2, 5.4 Net loss and material drop
5.4. The wide structure design should prevent the valve stem from hitting When the ear is closed, it will not cause internal pressure on the ear and cause the stem to come out. 5. The number of turning materials can be 1-2 turns. The total height should not be changed. The upper diameter should not be small. The material must be long and the door must be fixed. Knife PV1e, MPg connected to Table 2, select H: When the grid small PN16.1MP:. Use the increased test polyoxygen 8
JH/T8473-96
5.5.1 lubrication The appearance quality of castings shall comply with the requirements of R13281-89A. 5.5.2 The surface of the casting shall be smooth or not, and there shall be no loose or chipped surface. 5.5.3 The surface of the casting shall be smooth or not, and there shall be no loose or chipped surface. 1. The surface after adding 1 is not smooth, which sometimes affects the appearance of the flow, magnetism, and bad joints. 5.6.4 The pick (click on the firewood) cannot be grabbed, the sub-front should be lightly sunken, evenly hooked, and there should be no obstruction. 5.6 The filling test and high pressure dense sweep test shall be carried out in accordance with the provisions of a.7 of 21116006-90, and there shall be no leakage. 5.7 The internal cavity extinction degree is the same as that of B745 Fanglishijiaoxing The total mass and electric charge of impurities and standard materials are as follows: G
Gahang and pollution are assumed to be:
-number. Forging SG.C3. Steel S=0.0 S.
5.8 Temperature grade
When the pressure-temperature grade is in accordance with the provisions of B1S, the material with the specified scale in B1S shall be used. ,
6 Test tracking method
6.! The sub-valve group is subject to shell test and high pressure sealing test, and the production department needs to use low pressure airtight test instead of high pressure airtight test. Effective parts sealing test.
Test light purchase, test positive force, test to check the system can be pulled 2J161090 3.1-3. The heat is carried out in 6.3 group test. The medium flow direction is shown in Figure 12-14. Non | |tt||Figure 1 Two-reading group
3 Physical test
Figure 13 group
Left row of leading elements
Upper half contains
Hu Wangwei About the group body pressure period, the library part of the large see closed selected two, science mutual cover jade tight, so to maintain the test is correct, to say the valve benefit part changes to the test: type test, measuring cover , ask about the cover and read the diagnosis and treatment. There should be a big leak at the joint. 6.4 High Case Pad Test
6.4.1 Closed Test of Two Reading Groups
Soil Wide Test
Close the reading, the main ten penalty ends are rotated into the test medium pressure as shown in Figure 12, Under the specified test force and duration, check the main function: the light should be full
h) the drain valve should be tested evenly
mainly closed, the non-open 6.4.2 - Seal test of valve group The seal test of valve group shall be carried out according to the following requirements: JB/T473-·9G Close the right valve: Close the three valves, open the right valve, and let one end of the valve enter the test medium (see Figure 13). During the test output and duration specified by the company, check that there should be no sexual zone at both the left and right valve outlets. b) Leakage test of balance foot
Close the left valve and open the right valve. Check that there is no leakage at both ends within the specified test pressure and duration. 6.4.3 Level 5 Leakage Test | |tt||) Connect the flange valve and the dangerous
to the test valve and close the right end, then open the level valve, close the other four valves, and enter the test medium through the air (see Figure 14). Under the specified test pressure and holding time, check whether there is leakage. b) Balance and seal test
There is a valve in the upper room. Close it and leave 40 grams. Before the specified Test the pressure agent for a long time, check the right drain valve to see if there is any leakage. ) To the right, the sewage seal test
For the idle left time, if there is a valve leaking, close the sewage valve and keep The signal valve is in place, and the outlet box and the production balance valve are in place. At the specified test pressure and when full, check that there should be no leakage at the two sewage outlets. 6.5 New gas seal test
Test method: 4. Inspection method: You can use fertilizer water to check the emperor's throne, place the valve group in the consumption demand, and there should be no gas overflow in the whole place.
6.6 The inspection method for drying and cleaning in the inspection group shall be implemented in accordance with the provisions of IIi/T 7748. 7
Inspection rules
The inspection of the inspection group is divided into "inspection age and re-inspection", inspection See Table 3 for age items. Table: Inspection Item F
Appearance Inspection
Light Body Test
Island Pressure Tightness Test Control
Inner Cavity Clear Spot||tt ||Factory Inspection
Model Leather Version
The Taiwan letter set must pass the factory inspection and be accompanied by a certificate of conformity before it can leave the factory. 7.3 The following inspections should be carried out: a) Trial design and appraisal of new products or old products transferred to new factories; b) There are major changes in structure, process and technology between formal production and new factories. , which may affect the product performance: During normal production, regular or after-production inspections are carried out to check the stability of product quality; d) During long-term production After the complete suspension of production, when resuming production: e) If the factory inspection result is significantly different from the last type inspection result; the government shall submit the requirements for each machine to undergo type inspection in accordance with the law. 7.4 The inspection is carried out by randomly selecting the valves from the group of valves delivered by the quality inspection department of the production plant or randomly selecting the valves from the valves that have been supplied to the user but have not been used. The maximum number of units for sampling is 21, and the number of units for sampling is ?. When the sampling is carried out, the number of units for sampling is not limited, and the number of units for sampling is still ?. 7.5 If the type inspection results have items in the price group The technical requirements of the lower limit of 3 are allowed to be sampled and then the specified number of oil units is scanned, but the re-testing must all meet the specified technical requirements, otherwise it will be unqualified.CMPa idle volume room thickness based on GB122 is implemented PN232.MP: the thickness of the two bodies should be greater than the specified in GB12324.
5.2.3 The operation of the flash body and the transmitter should be carried out in accordance with the regulations of K7335 or (T/2716): the adjustment body and the alarm, the joint body connection should be released according to the provisions of GB106. 5.2.4
The connection between the adjustment body and the period should be equipped with anti-loose single or anti-pole pins to prevent loosening and change, so as to avoid the loss of fiber, drive the valve cover inspection valve and valve
version lamp The effective length of the steel rod should not be less than 1/4 of the diameter of the pipe. The thread thickness of the two rods, the support, the body and the cover should not be less than the H/6 level specified in [1]. The two rods and the adjustment can be integrated or processed separately. The assembled valve should be smooth and reliable. The valve should be smooth and reliable. 5.3. The wide surface of the valve and the two seats should have a proper hardness of 10TRC2. 5.4. The wide surface design should ensure that when the valve stem ear is hit, it will not be pressed by the closing part and cause the stem to fall out. 5. The number of turning materials can be 1--2 circles. The total height should not be changed. The diameter of the cabinet should be small. The material must be cut according to the decision of the door: when the nominal pressure cutter PV1e, MPg is selected from Table 2: when the grid is small PN16.1MP: when the increase of polyurethane is adopted, the appearance quality of the lubricating body casting parts should be in accordance with the provisions of R13281-89A grade. 5.5.2 The surface of the material should not be loose or light, and there should be no card missing after cutting. 5.5.3 The surface after cutting should not be affected by the appearance of the flow, magnetism, and bad engagement. 5.6.4 The pick (pointed) should not be moved, sub-front, and the start should be light and evenly hooked, and there should be no special resistance. 5.6 Filling test and high pressure airtight sweep test shall be carried out in accordance with the provisions of a.7 in 21116006-90, and there shall be no leakage. 5.7 The inner cavity elimination degree is the sum of the quality of impurities and the type of impurities in B745. The maximum filling degree of the equipment is as follows:
-number. Forging pin SG.C3. Steel S=0.0S.
5.8 Minimum temperature grade
When the pressure-temperature grade is in accordance with the provisions of B1S. For materials with standard or no design,
6 test tracking method
6.! The sub-valve group shall be subjected to shell test and high pressure sealing test. It is necessary to use the production space, and the production" uses low pressure airtight test instead of high efficiency parts sealing test.
Test light purchase, test positive force, test check when the system can be pulled 2J161090 3.1--3. The heat is performed when the medium flow direction of the reading group test is shown in Figure 12-14. Non-
Figure 1 Two reading groups
3 body test
Figure 13 group
Left row guide element
Upper half contains
Call the fear of the reading group body period pressure, the library part of the large see the closed line of the two, the science cover jade tight, is to maintain the test positive, to say the valve benefit part changes to the test: when the test type, the cover, the cover and the reading should be leaking. 6.4 High pressure gasket test 6.4.1 Sealing test of two valve groups Close the valve, open the valve, and inject the test medium into the main valve end (see Figure 12). Within the specified test force and duration, check whether the main valve is fully leaking. Keep the main valve closed. Close the valve and open the valve. Within the specified test force and duration, check whether the valve will leak. 6.4.2 Sealing test of valve group Close the left and right valves of the valve group: Close the three valves, open the valve, and inject the test medium into the valve end (see Figure 13). Within the specified test force and duration, check whether the left and right valve outlets are free of leakage. b) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both ends within the specified test pressure and duration. 6.4.3 Level 5 sealing test
) Close the right end of the flange valve and the sealing test valve, open the right valve, close the other valves, and input the test medium (see Figure 14). Under the specified test pressure and duration, check that there is no leakage at both ends. b) Balance sealing test
Close the remaining valves, and check that there is no leakage at the right end within the specified test pressure duration. ) Balance and right sewage sealing test
For the time being, there is a valve under the left valve, close the sewage valve, and keep the valve open, and check that there is no leakage at both sewage valves. Under the specified test pressure and duration, check that there is no leakage at both sewage valves. 6.5 Gas seal test
Test method 4, inspection method: Fertilizer water can be used to check the emperor's throne, the small river will be placed in the valve group, the whole place should be no gas overflow.
6.6 Inspection method for cleaning the valve group shall be implemented in accordance with the provisions of II/T 7748. 7
Inspection rules
The inspection of the valve group is divided into "inspection" and "re-inspection". The inspection items are shown in Table 3, Table: Inspection items Fwww.bzxz.net
Appearance inspection
Light body test
Pressure tightness test
Inner cavity cleaning
Factory inspection
Model
The valve group must pass the factory inspection and be accompanied by a certificate of conformity before leaving the factory. 7.3 The following types of inspections should be carried out: a) Trial type inspection of new products or old products transferred from the factory to new production;
; When there are major changes in structure, process and technology between formal production and product performance, which may affect the product performance;
; During normal production, periodically or after the first production cycle, a periodic inspection should be carried out to check the product quality stability; d) When resuming production after a long period of suspension; e) When the results of factory inspection are significantly different from those of the previous type inspection; According to the main business route, each machine must be subject to type inspection. 7.4 The type inspection is carried out by randomly selecting the valves from the group of valves supplied by the quality inspection department of the production factory or randomly selecting the valves from the valves that have been supplied to the user but have not been used. The maximum number of units for sampling is 21, and the number of units for sampling is ?. When the sampling is carried out, the number of units for sampling is not limited, and the number of units for sampling is still ?. 7.5 If the result of type inspection is lower than the technical requirements of the items in the group, it is allowed to re-sample the specified number of units with the number of units sampled, but the re-test must meet the specified technical requirements, otherwise it will be deemed unqualified. 10CMPa idle volume room thickness based on GB122 is implemented PN232.MP: the thickness of the two bodies should be greater than the specified in GB12324.
5.2.3 The operation of the flash body and the transmitter should be carried out in accordance with the regulations of K7335 or (T/2716): the adjustment body and the alarm, the joint body connection should be released according to the provisions of GB106. 5.2.4
The connection between the adjustment body and the period should be equipped with anti-loose single or anti-pole pins to prevent loosening and change, so as to avoid the loss of fiber, drive the valve cover inspection valve and valve
version lamp The effective length of the steel rod should not be less than 1/4 of the diameter of the pipe. The thread thickness of the two rods, the support, the body and the cover should not be less than the H/6 level specified in [1]. The two rods and the adjustment can be integrated or processed separately. The assembled valve should be smooth and reliable. The valve should be smooth and reliable. 5.3. The wide surface of the valve and the two seats should have a proper hardness of 10TRC2. 5.4. The wide surface design should ensure that when the valve stem ear is hit, it will not be pressed by the closing part and cause the stem to fall out. 5. The number of turning materials can be 1--2 circles. The total height should not be changed. The diameter of the cabinet should be small. The material must be cut according to the decision of the door: when the nominal pressure cutter PV1e, MPg is selected from Table 2: when the grid is small PN16.1MP: when the use of polyurethane 8
JH/T8473-96
5.5.1 The appearance quality of the lubricating body casting parts should be in accordance with the R13281-89A grade regulations. 5.5.2 The surface of the material should not be loose or light, and there should be no card missing after cutting. 5.5.3 The surface after cutting should not be affected by the appearance of the flow, magnetism, and bad engagement. 5.6.4 The pick (pointed) should not be moved, sub-front, and the start should be light and evenly hooked, and there should be no special resistance. 5.6 Filling test and high pressure airtight sweep test shall be carried out in accordance with the provisions of a.7 in 21116006-90, and there shall be no leakage. 5.7 The inner cavity elimination degree is the sum of the quality of impurities and the type of impurities in B745. The maximum filling degree of the equipment is as follows:
-number. Forging pin SG.C3. Steel S=0.0S.
5.8 Temperature grade
When the pressure-temperature grade is in accordance with the provisions of B1S. For materials with standard or no design,
6 test tracking method
6.! The sub-valve group shall be subjected to shell test and high pressure sealing test. It is necessary to use the production space, and the production "uses low pressure airtight test instead of high efficiency parts sealing test.
Test light purchase, test positive force, test check when the system can be pulled 2J161090 3.1--3. The heat is to execute 6.3 reading group test when the medium flow direction is shown in 12-14. Non-
Figure 1 two reading group
3 body test
Figure 13 group
left row guide element
upper half contains
call the death fear of reading group body pressure, the library part of the large see closed line selected two, science cover jade tight, so to maintain the test positive, to say the valve benefit part changes to the test: when the test type, the cover, cover and reading should be large leakage. 6.4 High pressure gasket test 6.4.1 Sealing test of two valve groups Close the valve, open the valve, and inject the test medium into the main valve end (see Figure 12). Within the specified test force and duration, check whether the main valve is fully leaking. Keep the main valve closed. Close the valve and open the valve. Within the specified test force and duration, check whether the valve will leak. 6.4.2 Sealing test of valve group Close the left and right valves of the valve group: Close the three valves, open the valve, and inject the test medium into the valve end (see Figure 13). Within the specified test force and duration, check whether the left and right valve outlets are free of leakage. b) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both ends within the specified test pressure and duration. 6.4.3 Level 5 sealing test
) Close the right end of the flange valve and the sealing test valve, open the right valve, close the other valves, and input the test medium (see Figure 14). Under the specified test pressure and duration, check that there is no leakage at both ends. b) Balance sealing test
Close the remaining valves, and check that there is no leakage at the right end within the specified test pressure duration. ) Balance and right sewage sealing test
For the time being, there is a valve under the left valve, close the sewage valve, and keep the valve open, and check that there is no leakage at both sewage valves. Under the specified test pressure and duration, check that there is no leakage at both sewage valves. 6.5 Gas seal test
Test method 4, inspection method: Fertilizer water can be used to check the emperor's throne, the small river will be placed in the valve group, the whole place should be no gas overflow.
6.6 The inspection method of the valve group is in accordance with the provisions of II/T 7748. 7
Inspection rules
The inspection of the valve group is divided into "inspection" and "re-inspection". The inspection items are shown in Table 3, Table: Inspection items F
Appearance inspection
Light body test
Pressure tightness test
Inner cavity cleaning
Factory inspection
Model
The valve group must pass the factory inspection and be accompanied by a certificate of conformity before leaving the factory. 7.3 The following types of inspections should be carried out: a) Trial type inspection of new products or old products transferred from the factory to new production;
; When there are major changes in structure, process and technology between formal production and product performance, which may affect the product performance;
; During normal production, periodically or after the first production cycle, a periodic inspection should be carried out to check the product quality stability; d) When resuming production after a long period of suspension; e) When the results of factory inspection are significantly different from those of the previous type inspection; According to the main business route, each machine must be subject to type inspection. 7.4 The type inspection is carried out by randomly selecting the valves from the group of valves supplied by the quality inspection department of the production factory or randomly selecting the valves from the valves that have been supplied to the user but have not been used. The maximum number of units for sampling is 21, and the number of units for sampling is ?. When the sampling is carried out, the number of units for sampling is not limited, and the number of units for sampling is still ?. 7.5 If the result of type inspection is lower than the technical requirements of the items in the group, it is allowed to re-sample the specified number of units with the number of units sampled, but the re-test must meet the specified technical requirements, otherwise it will be deemed unqualified. 108. Temperature level
When asking about the pressure-temperature level B, please refer to the regulations of B1S. For materials with the specified scale effect in B1S, there are standards or no design,
6 test tracking method
6.! The valve group is required to carry out shell test and high pressure sealing test. The production department shall use low pressure airtight test instead of high efficiency sealing test.
When testing light, the test force and the test duration can be pulled out. 3.1-3. of 2J161090 are carried out. The medium flow direction during the test is shown in Figure 12-14. Non
Figure 1 two reading group
3 body test
Figure 13 group
left row guide element
upper half contains
call the death fear about the reading group body emperor period pressure, the library first part of the large closure is selected, the science cover jade tight relationship, is to maintain the test is correct, to say the valve benefit part changes to the test: when the test method, the measurement cover, question cover and reading should be leaking according to the diagnosis. 6.4 High pressure gasket test 6.4.1 Sealing test of two valve groups Close the valve, open the valve, and inject the test medium into the main valve end (see Figure 12). Within the specified test force and duration, check whether the main valve is fully leaking. Keep the main valve closed. Close the valve and open the valve. Within the specified test force and duration, check whether the valve will leak. 6.4.2 Sealing test of valve group Close the left and right valves of the valve group: Close the three valves, open the valve, and inject the test medium into the valve end (see Figure 13). Within the specified test force and duration, check whether the left and right valve outlets are free of leakage. b) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both ends within the specified test pressure and duration. 6.4.3 Level 5 sealing test
) Close the right end of the flange valve and the sealing test valve, open the right valve, close the other valves, and input the test medium (see Figure 14). Under the specified test pressure and duration, check that there is no leakage at both ends. b) Balance sealing test
Close the remaining valves, and check that there is no leakage at the right end within the specified test pressure duration. ) Balance and right sewage sealing test
For the time being, there is a valve under the left valve, close the sewage valve, and keep the valve open, and check that there is no leakage at both sewage valves. Under the specified test pressure and duration, check that there is no leakage at both sewage valves. 6.5 Gas seal test
Test method 4, inspection method: Fertilizer water can be used to check the emperor's throne, the small river will be placed in the valve group, the whole place should be no gas overflow.
6.6 Inspection method for cleaning the valve group shall be implemented in accordance with the provisions of II/T 7748. 7
Inspection rules
The inspection of the valve group is divided into "inspection" and "re-inspection". The inspection items are shown in Table 3, Table: Inspection items F
Appearance inspection
Light body test
Pressure tightness test
Inner cavity cleaning
Factory inspection
Model
The valve group must pass the factory inspection and be accompanied by a certificate of conformity before leaving the factory. 7.3 The following types of inspections should be carried out: a) Trial type inspection of new products or old products transferred from the factory to new production;
; When there are major changes in structure, process and technology between formal production and product performance, which may affect the product performance;
; During normal production, periodically or after the first production cycle, a periodic inspection should be carried out to check the product quality stability; d) When resuming production after a long period of suspension; e) When the results of factory inspection are significantly different from those of the previous type inspection; According to the main business route, each machine must be subject to type inspection. 7.4 The type inspection is carried out by randomly selecting the valves from the group of valves supplied by the quality inspection department of the production factory or randomly selecting the valves from the valves that have been supplied to the user but have not been used. The maximum number of units for sampling is 21, and the number of units for sampling is ?. When the sampling is carried out, the number of units for sampling is not limited, and the number of units for sampling is still ?. 7.5 If the result of type inspection is lower than the technical requirements of the items in the group, it is allowed to re-sample the specified number of units with the number of units sampled, but the re-test must meet the specified technical requirements, otherwise it will be deemed unqualified. 108. Temperature level
When asking about pressure-temperature level B, please refer to the regulations of B1S. For materials with standard or no standard,
6 test method
6.! All valve groups are subject to shell test and high pressure sealing test. The production department shall use low pressure airtight test instead of high efficiency parts sealing test.
When testing light, the test force and the test duration shall be pulled according to 3.1-3. of 2J161090. The flow direction of the medium during the test is shown in Figure 12-14. Non
Figure 1 two reading group
3 body test
Figure 13 group
left row guide element
upper half contains
call the death fear about the reading group body emperor period pressure, the library first part of the large closure is selected, the science cover jade tight relationship, is to maintain the test is correct, to say the valve benefit part changes to the test: when the test method, the measurement cover, question cover and reading should be leaking according to the diagnosis. 6.4 High pressure gasket test
6.4.1 Sealing test of two valve groups
For the test
Close the valve, open the valve, and insert the test medium at one end (see Figure 12). At the specified test force and duration, check whether the main valve is fully leaking.
h) The drain valve should be kept closed. The valve should be opened. Within the specified test force and duration, check whether the drain valve will leak.
6.4.2 Sealing test of valve group
The left and right valves of the valve group should be sealed.
JB/T473-·9G
Close the right valve: Close the three valves, open the valve, and insert the test medium at one end (see Figure 13). During the specified test force and duration, check whether the left and right valve outlets are free of leakage. b) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both outlets within the specified test pressure and duration. 6.4.3 Level 5 sealing test
) Close the right valve and the left valve, open the right valve, close the other valves, and input the test medium (see Figure 14). Under the specified test pressure and duration, check that there is no leakage at both outlets. b) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both outlets within the specified test pressure and duration. ) Balance sealing test
Close the left valve and open the right valve. Check that there is no leakage at both outlets within the specified test pressure and duration. 6.5 Gas seal test
Test method 4, inspection method: Fertilizer water can be used to check the emperor's throne, the small river will be placed in the valve group, the whole place should be no gas overflow.
6.6 Inspection method for cleaning the valve group shall be implemented in accordance with the provisions of II/T 7748. 7
Inspection rules
The inspection of the valve group is divided into "inspection" and "re-inspection". The inspection items are shown in Table 3, Table: Inspection items F
Appearance inspection
Light body test
Pressure tightness test
Inner cavity cleaning
Factory inspection
Model
The valve group must pass the factory inspection and be accompanied by a certificate of conformity before leaving the factory. 7.3 The following types of inspections should be carried out: a) Trial type inspection of new products or old products transferred from the factory to new production;
; When there are major changes in structure, process and technology between formal production and product performance, which may affect the product performance;
; During normal production, periodically or after the first production cycle, a periodic inspection should be carried out to check the product quality stability; d) When resuming production after a long period of suspension; e) When the results of factory inspection are significantly different from those of the previous type inspection; According to the main business route, each machine must be subject to type inspection. 7.4 The type inspection is carried out by randomly selecting the valves from the group of valves supplied by the quality inspection department of the production factory or randomly selecting the valves from the valves that have been supplied to the user but have not been used. The maximum number of units for sampling is 21, and the number of units for sampling is ?. When the sampling is carried out, the number of units for sampling is not limited, and the number of units for sampling is still ?. 7.5 If the result of type inspection is lower than the technical requirements of the specified items in the group, it is allowed to re-sample the specified number of units with the number of units sampled, but the re-test must meet the specified technical requirements, otherwise it will be deemed unqualified. 10
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