Some standard content:
Petroleum and Natural Gas Industry Standard of the People's Republic of China SY/T 05111996
Oil Storage Tank Breathing Valve
1996-04-21 Issued
China National Petroleum Corporation
1996-10-01 Implementation
This standard is a revision of SY751187. From the date of entry into force, it replaces SY7511-87. The first release date of this standard is December 31, 1987. This standard was proposed by the Planning and Design Institute of China National Petroleum Corporation. This standard was developed by the Oil and Gas Pipeline Construction and Design Professional Standardization Committee. This standard was drafted by Fushun Petroleum Machinery Alkali Factory. The main drafters of this standard are Zhang Li, Ma Chongyao, Liao Zhenpeng, Wang Jun, and Tian Zhijun.|tt||Petroleum and Natural Gas Industry Standard of the People's Republic of China Breathing Valve for Petroleum Storage Tanks
SY7 T 0511--1996
Replaces SY7511--87
This standard specifies the classification, requirements, test methods, marking, and packaging of breathing valves for petroleum storage tanks. This standard is applicable to breathing valves for storage tanks installed on storage tanks for crude oil, gasoline, kerosene and other light products (hereinafter referred to as breathing valves). 2 Referenced Standards
The following standards contain the following provisions: The provisions of this standard are constituted by reference in this standard. The versions shown are valid when this standard is published. The standards in force will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards GB/T4237-1992 Hot-rolled stainless steel plates GBT6414--1986 Dimensional tolerances for castings
GB/T9438-1988 Technical conditions for aluminum alloy castings GB/T 9439:-1988
Carbon cast iron
GB/T1220-1992
Stainless steel bars
Unspecified tolerances for linear dimensions
GB7 T 1804--1992 General public maintenance China GB/T13306199: (iB/T3384-[992 General technical conditions for packaging of electromechanical products J1378-59 Cast iron flange SY5302-87 General technical conditions for iron parts used in drilling and mining machinery products Polyvinyl fluoride pipes ZB G33001-85 ZBG33003-85 ZB G 33004--85
3 Definitions
PTFE rods
Polytetrafluoroethylene foot membrane
This standard adopts the following definitions.
3.1 Operating pressure
When the gas volume of the breathing valve reaches the specified value, the pressure of the gas in the oil storage tank space is called the operating pressure of the breathing valve. 3.2 Opening pressure
During the test, when the valve disc of the breathing valve is in a continuous "exhalation" or "inhalation" state, the pressure at this time is called the opening force of the breathing valve. 4 Requirements
4.1 Product classification
4.1.1 The operating pressure of the breathing valve is divided into three levels, and its codes are shown in Table 1. 4.1.2 The structural types of the breathing valve are divided into two types: large type and ordinary type. Its operating temperature and code are shown in Table 2. 4.1.3 The specifications of the breathing valve are expressed by the nominal diameter of the connecting flange, see Installation 3. 4.1.4 Product model
4.1.4.1 The code name of the breathing valve is GF. GF is composed of the two Chinese phonetic letters "罐" and "阀". China National Petroleum and Natural Gas Corporation approved it on April 21, 1996 and implemented it on January 1, 1996
SY/ T 0511---1996
Operating pressure
- 355, -295
+980, 295
+17(5, -295
Evaluation of valve operating pressure classification
Note: The "+" in the code indicates positive pressure, that is, the exhalation pressure, and the "-" in the code indicates the "inhalation" pressure. 2 Breathing structure type
Production type
Jin Da Jia
Pu Dao type||t t||Product number representation method is as follows:
Example:
Operating temperature
-30~(0
Represents the breathing temperature
Connection method nominal diameter DN
Converted to pressure code:
Specification:
Structural type code:
Product name code
Operating pressure is 1765P: and -295Pn, the nominal diameter of the oil storage tank is 150mm, the design is GFQ150-C.
4.2 Technical requirements
4.2.1 In addition to meeting the requirements of this standard, the valve body shall also meet the requirements of the design drawings and relevant technical specifications. 4.2.2 Material:
The valve body should be made of wrought iron and aluminum alloy, and the performance should meet the requirements of GBT94 and GBT938, or other equivalent materials.
4.2.2.2 The valve disc, guide rod and connector should be made of stainless steel, and its performance should meet the requirements of GBT4237 and GB: T1220.
5Y/ T 05111996
4.2.2.3 Seals and sliding sleeves should be made of PTFE, and their performance should comply with the specifications of ZBC33001, ZBG33003 and 7B (33004), or other equivalent materials. 4.2.3 Performance
4.2.3.1 The valve body of the breathing valve should be able to withstand a pressure of 0.20MP:1 without leakage or permanent deformation. 4.2.3.2 Breathing rubber (ordinary type) Under temperature, the opening pressure value of the weather breathing valve should not be greater than the value in Table 1 when the air humidity is greater than 70% and the minimum temperature is -34-1℃. After 24 hours of freezing, the opening pressure value should not be greater than the value in Table 1. The difference is: -20[~0 when positive pressure is positive, 0-20Pa when negative pressure is positive, and the requirements of 4.2.3.3 and 4.2.3.4 shall be met. 4.2.3.3 When the valve disc of the breathing valve is working, the action shall be sensitive and reliable, and the sealing shall be ensured after the action is completed. 4.2.3.4 Under the operating pressure conditions, the ventilation volume of the breathing valve shall not be less than the regulations in Table 4. Table 4 Breathing valve gas volume
Pressure level
--17(:5
The calibration of the breathing valve leakage volume is based on 0.75 times the operating pressure as the test pressure. The value shall comply with the requirements of Table 5. Table 5 Breathing valve leakage
Leakage design
n hi-!
4.2.4 Manufacturing and assembly:
4.2.4.1 The manufacturing of cast iron parts shall comply with SY5302. Lead alloy castings shall comply with the regulations of GB, T9438. 4.2.4.2 All parts shall be manufactured according to the m grade in GB/T1804 with T dimensions: m. The tolerance of chain parts shall be in accordance with (iH, 『6414 inspection: 2om
4.2.4.4 The manufacturing of flanges to be manufactured shall comply with the regulations of 378 When the flange is made of other materials, the relevant standards of the platform shall be applied. 4.2.4.5
After the body test: the test medium in the cavity should be completely cleaned and anti-rust paint should be applied. The parts can be assembled after they are inspected and qualified (purchased parts and outsourced parts should have a qualified certificate). 4.2.4.6
When the valve disc seal is made of non-metallic film, its total thickness should be uniform, flat and smooth: there should be no scratches, and avoid defects that affect the quality.
SY T 0511-1996
4.2.4.8 After the valve assembly and the sealing parts are installed, the airtightness and sealing performance must be ensured. The pipe seal should not have any defects such as grinding. 4.2.4.9 After the breathing valve is assembled, the valve disc should be smooth and there should be no sticking. 5 Test method
5.1 Inspectionwww.bzxz.net
5.1.1 Type inspection
When the design, process and material of the first batch of breathing valves are to be changed, the type inspection should be carried out according to 4.2.3.5, 5.4.5.5.6 and 5.7. The type inspection shall be carried out on no less than two sets. 5.1.2 ! Inspection:
Respiratory suffocation should be dialed in 4.2.3.2 (inspection of opening pressure at room temperature) and the detailed test given in 4.2.3.3 should be carried out according to 4.2.3.5 and 3.4. The number of samples should be 5% of the batch, but no less than two stations. If one of the samples in the batch is not qualified, the number of samples can be doubled. If all the samples are qualified, a full inspection can be carried out.
5.2 Test medium
5.2.1 The valve body output test medium is 5~35% water. It should not contain media that are corrosive to the valve body material. 5.2.2 Opening pressure, the air used for the gas flow test is 0.1MPi in absolute pressure, 20°C in temperature, 50% in relative humidity, and 1.2k, m in density. If the air is not in this state, it should be converted into this state gas 5.3. Equipment
The breathing valve core should be properly installed on the test bench without leakage, and the test tube should be smooth and smooth without unevenness, and clean and tidy.
5.4 Valve body water pressure
When conducting water pressure test: the test pressure should be 0.20M according to the detailed rules given in 5.2. The pressure should be maintained for a period of 0mm. The test results should meet the detailed rules given in 5.2.
5.5 Air volume test
5.5.1 The test device for starting pressure and ventilation is shown in Figure 1. The effective cross-sectional area of the test tube on the device should be greater than or equal to the cross-sectional area of the connecting flange of the breathing valve. The inner wall of the common pipe should be flat and there should be no elbows, valves and other accessories that affect the stability of air flow and increase pressure loss.
! Air belt one pipe: 4:
7-Release valve: Hose: - connection 10-Micro 1 air avoidance; 12-circle door Figure 1 Opening pressure and gas volume test device p8
SY/T (5111996
5.5.2 The inner diameter of the pipe is the same as the nominal diameter of the breathing valve connection flange, and the outlet edge connected to the dummy gas tank is a smooth transition, see Figure 2, and there should be no visible damage.
Figure? Pipe
5.5.3 Sensing port It should be in the middle of the test pipe with stable airflow, and the distance from the elbows or valves on both sides should be greater than or equal to 4. The lower outlet edge connected to the test pipe should be free of thorns. 5.5.4 Start the pressure test:
The breathing valve to be tested is installed on the flange of the circulating gas pipe. Adjust the valve to gradually increase or decrease the pressure in the gas storage tank. Adjust the valve to make it in the open state, read the pressure value and the minute value on the micro-injection meter connected to it, and then rotate the valve disc 90, 1 Repeat the test at 801°, repeat it three times for each working angle, and take the average value. The test result shall comply with the rules given in 4.2.3.2 and 4.2.3.
5.5.5 Ventilation test:
5.5.5.1 Insert the anemometer probe with 0.5-10 level accuracy vertically into the measuring pipe wall, and measure the heat of the measuring points at different oxygen levels. The position and number of the measuring points shall comply with the rules given in 5.5.5.2 and 5.5.5.3. 5.5.2 In the rectangular test When measuring the average air velocity in a tube, the tube cross section shall be divided into several equal small cross sections: see Figure 3. The air velocity shall be measured at the center of each small cross section: The requirements for the small cross sections are as follows: The shape of each small cross section should be close to a square: The number of small cross sections shall be less than 9.
Figure 3 Section division of rectangular test tube
5.5.5.3 When measuring the average air velocity in a circular test tube, the tube cross section shall be divided into several equal annular small cross sections, each yearSY/ T 0511
See Figure 4. The distance between the centers of the measuring points is calculated by the formula (). The measuring points are located in the symmetric section of the measuring point. The radius of the measuring point is shown in the formula: R: distance from the center of the test tube to the measuring point, mm R: test tube diameter, m;
- the sequence number of the network rings from the center of the test tube; - the number of loops divided in the lock section during the test, and the number is selected according to the installation regulations.
- the number of rings in the test tube ().
- the number of rings in the test tube. The gas volume measurement should be carried out under operating pressure. Read the flow velocity value at each measuring point 10 times per minute, and calculate the average value of 5.3.5.41
. The average velocity of the gas flow in the cross section is calculated according to formula (2). The result should meet the correction rules given in 4.2.3.4. 036004.1
. m
4. The volume of the test tube is measured, and the flow rate is measured. The flow rate is measured in degrees: m/s
5.6 Leakage test
The test device for leakage condensation ratio is shown in Figure 5. The pressure of the leakage test is 0.75 times the operating pressure. This value is read on the micrometer, and the maximum leakage value is read on the flowmeter (the accuracy level of the flowmeter is 0.5-10). Read each measurement 10 times per minute, and read 10 times in total. The average is about 0.5. The result shall be in accordance with the rules given in 4.23.5. 57 Low temperature test
The test stand shall be installed in a low temperature box. The temperature in the low humidity box shall be reduced to -14 to -15 (-14°C). Air with a temperature not lower than 0% shall be continuously fed into the low temperature box for a period of time. The temperature in the low temperature box shall be reduced by 3%. After 24 hours of temperature cycling, the micromanometer on one side of the test stand shall be connected to the air power source through a stable port containing air at room temperature. When the valve disc of the breathing valve is in the open state, the pressure value shall be read. The test shall be repeated 1 time. Each time the result shall be in accordance with the rules given in 4.23.2. SY/ T 0511
[—micro pressure signal: 2 valves: 3 test stand 4—wrinkle test breathing valve: 5-flow board: pressure wake-up: 7—press cylinder; 8-source pressure lubrication: 9—connect air power source intelligence: 0—stealing degree! : Seven-type system T Figure 5 Leakage test device
(marking,
packaging and storage
table certificate suction valve should be fixed in an obvious position permanent product mark, loose label should comply with GB: T13306 regulations, and mark crime:) product name;
b) product model! number;
operating identification, operating pressure, reverse
t) product quality:
) export! No.:||t t||\Whitening period and lubrication name
6.2 The non-flange surface of the breathing valve should be painted with anti-rust primer, and the outer surface should be painted twice. The paint should be evenly applied, the sound and luster should be bright, and the baking varnish process should be used as much as possible. The flange surface should be coated with anti-rust grease: and protected with a plastic cover. The whole is wrapped with plastic film and finally packaged. The packaging should be carried out in accordance with the provisions of GB/T13384. 3 The breathing valve should be placed in a warehouse with rainproof facilities. It is not allowed to be inverted during storage, modification and transportation. 6.4 The following documents should be provided when each breathing valve is shipped: Installation list:
b) Product manual, the content of which should include air pressure and leakage: Product certificate:
Use and instructions3 When measuring the average inverse of the airflow in a circular test tube, the cross section in the tube should be divided into a number of equal annular sections, see Figure 4, the distance between the centers of the measuring points is calculated according to the formula () and the center of the measuring point is the same as the center of the circle. The measuring point is located at the symmetric radius of the measuring section. In the formula: R: distance from the center of the test tube to the measuring point, mm R: diameter of the test tube, m; - number of loops from the center of the test tube; - number of loops divided in the cross section during the test, the number of which shall be selected according to the provisions of the test tube (). 5 Number of rings in the test tube () The measurement of the airflow should be carried out under operating attention. Read the velocity value per minute at each measuring point. Calculate the average value of 5.3.5.41
, where 0 is the average velocity of the airflow in the cross section. Calculate the value according to formula (2). The result should comply with the correction rule given in 4.2.3.4. 036004.1
Quantity. m
4 Quantity test tube volume,
Capacity: m/s
5.6 Leakage test
The test device for leakage ratio is shown in Figure 5. The pressure of the leakage test is 0.75 times the operating pressure. This value is read on the micrometer. The maximum leakage value is read on the flow meter (the accuracy level of the flow meter is 0.5-10). Read each measurement for the maximum number of times per minute, a total of times, and the average value is calculated. The result should comply with the correction rule given in 4.23.5. 57 Low temperature test
The test frame shall be installed in a low temperature box, and the temperature in the low humidity box shall be reduced to -14~-15 (-14℃~-15℃). The temperature of the product shall be continuously fed into the low temperature box with a temperature of not less than 0%. Before the disc of the breathing valve is opened, the temperature in the low temperature box shall be reduced by 3%. After 24 hours of temperature cycling, the micromanometer on one side of the test frame shall be connected to the air power source through a stable port with air at room temperature. When the disc of the breathing valve is in the open state, read the pressure value. Repeat the test "1 time, and each time the solution shall meet the details given in 4.23.2.SY/T 0511
[—micro pressure signal: 2 valves: 3 test stand 4—wrinkle test breathing valve: 5-flow board: pressure wake-up: 7—press cylinder; 8-source pressure lubrication: 9—connect air power source intelligence: 0—stealing degree! : Seven-type system T Figure 5 Leakage test device
(marking,
packaging and storage
table certificate suction valve should be fixed in an obvious position permanent product mark, loose label should comply with GB: T13306 regulations, and mark crime:) product name;
b) product model! number;
operating identification, operating pressure, reverse
t) product quality:
) export! No.:||t t||\Whitening period and lubrication name
6.2 The non-flange surface of the breathing valve should be painted with anti-rust primer, and the outer surface should be painted twice. The paint should be evenly applied, the sound and luster should be bright, and the paint process should be used as much as possible. The flange surface should be coated with anti-rust grease: and protected with a plastic cover. The whole is wrapped with plastic film and finally packaged. The packaging should be carried out in accordance with the provisions of GB/T13384. 3 The breathing valve should be placed in a warehouse with rainproof facilities. It is not allowed to be inverted during storage and transportation. 6.4 The following documents should be provided when each breathing valve is shipped: Installation list:
b) Product manual, the content of which should include air pressure and leakage: Product certificate:
Use and instructions3 When measuring the average inverse of the airflow in a circular test tube, the cross section in the tube should be divided into a number of equal annular sections, see Figure 4, the distance between the centers of the measuring points is calculated according to the formula () and the center of the measuring point is the same as the center of the circle. The measuring point is located at the symmetric radius of the measuring section. In the formula: R: distance from the center of the test tube to the measuring point, mm R: diameter of the test tube, m; - number of loops from the center of the test tube; - number of loops divided in the cross section during the test, the number of which shall be selected according to the provisions of the test tube (). 5 Number of rings in the test tube () The measurement of the airflow should be carried out under operating attention. Read the velocity value per minute at each measuring point. Calculate the average value of 5.3.5.41
, where 0 is the average velocity of the airflow in the cross section. Calculate the value according to formula (2). The result should comply with the correction rule given in 4.2.3.4. 036004.1
Quantity. m
4 Quantity test tube volume,
Capacity: m/s
5.6 Leakage test
The test device for leakage ratio is shown in Figure 5. The pressure of the leakage test is 0.75 times the operating pressure. This value is read on the micrometer. The maximum leakage value is read on the flow meter (the accuracy level of the flow meter is 0.5-10). Read each measurement for the maximum number of times per minute, a total of times, and the average value is calculated. The result should comply with the correction rule given in 4.23.5. 57 Low temperature test
The test frame shall be installed in a low temperature box, and the temperature in the low humidity box shall be reduced to -14~-15 (-14℃~-15℃). The temperature of the product shall be continuously fed into the low temperature box with a temperature of not less than 0%. Before the disc of the breathing valve is opened, the temperature in the low temperature box shall be reduced by 3%. After 24 hours of temperature cycling, the micromanometer on one side of the test frame shall be connected to the air power source through a stable port with air at room temperature. When the disc of the breathing valve is in the open state, read the pressure value. Repeat the test "1 time, and each time the solution shall meet the details given in 4.23.2.SY/T 0511
[—micro pressure signal: 2 valves: 3 test stand 4—wrinkle test breathing valve: 5-flow board: pressure wake-up: 7—press cylinder; 8-source pressure lubrication: 9—connect air power source intelligence: 0—stealing degree! : Seven-type system T Figure 5 Leakage test device
(marking,
packaging and storage
table certificate suction valve should be fixed in an obvious position permanent product mark, loose label should comply with GB: T13306 regulations, and mark crime:) product name;
b) product model! number;
operating identification, operating pressure, reverse
t) product quality:
) export! No.:||t t||\Whitening period and lubrication name
6.2 The non-flange surface of the breathing valve should be painted with anti-rust primer, and the outer surface should be painted twice. The paint should be evenly applied, the sound and luster should be bright, and the baking varnish process should be used as much as possible. The flange surface should be coated with anti-rust grease: and protected with a plastic cover. The whole is wrapped with plastic film and finally packaged. The packaging should be carried out in accordance with the provisions of GB/T13384. 3 The breathing valve should be placed in a warehouse with rainproof facilities. It is not allowed to be inverted during storage, modification and transportation. 6.4 The following documents should be provided when each breathing valve is shipped: Installation list:
b) Product manual, the content of which should include air pressure and leakage: Product certificate:
Use and instructions
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.