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MHT6092-2013: Operating procedure for commercial aviation fuel pipeline pigging
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| MH/T 6092-2013 | English | 199 |
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Operating procedure for commercial aviation fuel pipeline pigging
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MH/T 6092-2013
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Standard similar to MHT6092-2013 MH/T 6093 MH/T 6096 MH/T 6091 Basic data | Standard ID | MH/T 6092-2013 (MH/T6092-2013) | | Description (Translated English) | Operating procedure for commercial aviation fuel pipeline pigging | | Sector / Industry | Civil Aviation Industry Standard (Recommended) | | Word Count Estimation | 8,825 | | Date of Issue | 10/5/2013 | | Date of Implementation | 1/8/2013 | | Issuing agency(ies) | Civil Aviation Administration of China | MHT6092-2013: Operating procedure for commercial aviation fuel pipeline pigging---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Operating procedure for commercial aviation fuel pipeline pigging
ICS 49.100
V 56
Civil Aviation Industry Standard of the People's Republic of China
Rules for pigging operation of civil aviation fuel long-distance pipeline
2013-05-10 released
2013-08-01 implementation
Issued by Civil Aviation Administration of China
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by the Aircraft Airworthiness Certification Department of the Civil Aviation Administration of China.
This standard was approved by the Aircraft Airworthiness Certification Department of the Civil Aviation Administration of China.
This standard is under the jurisdiction of the China Academy of Civil Aviation Science and Technology.
Drafting organization of this standard. China National Aviation Fuel Corporation.
The main drafters of this standard. Cai Liang, Zhang Ruicai, Huang Qingding, Shao Changwen, Li Jiqing, Hou Zhipeng, Huang Haipin, Jiang Xufeng, Sun Chao.
Rules for pigging operation of civil aviation fuel long-distance pipeline
1 Scope
This standard specifies long-distance pipeline pigs for civil aviation fuel, pigging operations organization, pigging operations, emergency measures and data compilation and
Aggregate requirements.
This standard applies to the pigging operations of civil aviation fuel long-distance pipelines.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
Quality control of MH/T 6080 civil aviation fuel long-distance pipeline transportation
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Pipeline pig
It is formed by connecting the leather bowl and the skeleton, and is pushed by the conveying medium in the pipeline. It is a tool used to clean up the dirt and impurities in the pipeline.
3.2
Magnitude of interference
The percentage of the difference between the outer diameter of the cup and the inner diameter of the pipe to the inner diameter of the pipe.
4 Pipe cleaner
4.1 Classification
4.1.1 Pipe cleaners are divided into the following two categories according to the form of the cup.
--Straight plate-shaped pipe cleaner adopts straight plate-shaped cup;
--Dish-shaped pipe cleaner adopts a dish-shaped leather bowl.
4.1.2 Pipe cleaners are divided into the following three categories according to their functions.
--Brush type pipe cleaner;
-Diameter pig;
--Magnetic pig.
4.2 Requirements for use
4.2.1 For newly-built pipelines or pipelines that have not been pigged for a long time, the first pigging operation should use a diameter measuring pig.
4.2.2 Brush pigs should be selected for pipelines that are regularly pigged.
4.2.3 Before using the magnetic pig, the brush-type pig should be used to remove most of the impurities before the magnetic pig can be used for cleaning.
Pipe work to avoid jamming.
4.2.4 When pigging is carried out for the first time, the deformation of the pipeline shall be confirmed to ensure the passage of the pig.
4.2.5 The technical parameters of the signal and receiving device of the pig should meet the requirements for use.
4.2.6 Straight-plate pigs should be used for pigging operations on pipelines painted with anticorrosive materials on the inner wall.
4.3 Assembly
4.3.1 The pig can be assembled in different structures according to the purpose of the pig.
4.3.2 A pull ring should be set in front of the frame, and the length of its protruding part should be controlled between 20 mm and 80 mm depending on the pipe diameter.
4.3.3 The frame should be able to install 2 or more cups and signalling systems.
4.3.4 The surface of the leather bowl should be smooth, without obvious defects, and the storage time should not exceed 3 years.
4.3.5 The fastening bolts of the pipe cleaner should be tightened with locknuts and symmetrically tightened. The end of the screw should be within 10 mm after tightening.
4.3.6 The outer diameter of the cup should be 1.10 to 1.26 times the inner diameter of the pipe.
4.3.7 It should be assembled according to the spacing required by the design, and the coaxiality of the cup after installation should not be greater than 2 mm.
4.3.8 The transmission device, steel brush and diameter measuring disc should be installed according to the operation requirements.
4.3.9 After the assembly is complete, check the drain hole.
4.3.10 The drain hole of the pig should be opened for the first pass through the ball to sweep the line.
4.4 Conditions of use
4.4.1 The temperature range of the working environment is -30 ℃～100 ℃.
4.4.2 The working pressure should be less than or equal to 15 MPa.
4.4.3 The pigging operation should be carried out under daily pipeline transportation conditions, and the operating speed should not exceed 4.5 m/s.
4.4.4 The minimum radius of curvature through the elbow should not be less than 1.5 times the pipe diameter.
4.4.5 The maximum deformation of the straight pipe section of the pipeline shall not exceed 25% of the pipe diameter.
5 Organization of pigging operations
5.1 Operating cycle
A reasonable pigging cycle should be determined according to the pipeline operating conditions, the pipeline's transmission efficiency and pressure difference, and the specific time shall be implemented in accordance with MH/T 6080.
5.2 Operating conditions
5.2.1 The amount of aviation fuel at the sending end should be greater than the capacity of the pipeline in the pigging section.
5.2.2 The tank capacity of the oil tank at the receiving end should be greater than the amount of aviation fuel in the pigging section.
5.2.3 The receiving end should have sufficient recovery oil tank capacity.
5.3 Work plan
5.3.1 Program content
The contents of the pigging plan should include.
a) Pipeline overview description, including pipeline specifications, pipeline length, pipeline service life, pipeline safe working pressure, and relative pipeline elevation
Poor, cross-regional situation of pipeline crossing, pipeline elbow, pipeline deformation, pipeline intermediate valve chamber, pipeline branch, tee, special pipeline geomorphology
Situation etc.;
b) The situation of the receiving and dispatching pig station, including the receiving and dispatching balls, valves, instruments, venting pipelines, sewage pipelines and surrounding environmental conditions;
c) Organizational leadership and division of labor;
d) The pipeline operation status, including the previous pigging operation record, process operation parameters, and the forecast of the pig's arrival time at each station;
e) Selection of pigs;
f) Pigging operation procedures;
g) Emergency plan;
h) Pigging work schedule;
i) Security measures.
5.3.2 Estimation of operating parameters
5.3.2.1 Fuel quantity
The fuel quantity for pigging operations is generally estimated according to formula (1).
5.3.2.3 Total running time of pigging operations
The total running time required for pigging operations is generally estimated according to formula (3).
5.3.3 Pigging monitoring points
5.3.3.1 In general, the first monitoring point should be no more than 2 km away from the pig’s originating station, and the last monitoring point should be no smaller than the receiving station.
At 2 km. Monitoring points should generally be set up in the middle valve room, overhead section, branch line, crossing section, and location with large elevation difference. According to the pipeline
International operating conditions, encryption settings.
5.3.3.2 The time of pig reaching each monitoring point shall be estimated according to the operating speed of the pig, and timely adjustment shall be made according to the actual working conditions.
6 Pigging operations
6.1 Inspection
6.1.1 Check the sending and receiving system of the pig. Sending and receiving device, quick opening blind switch and seal, pressure gauge and ball indicator
It should be intact, the valve should be flexible and easy to use, the pressure gauge should be within the verification period, and the sewage system should be normal.
6.1.2 The pig should be intact and clean.
6.1.3 Pipeline transportation should run smoothly.
6.2 Delivery of the pig
6.2.1 The sending process of the pig is shown in Figure 1.
Figure 1 The sending flow chart of the pig
6.2.2 Confirm that valves 1, 3, 4, and 5 in Figure 1 are all closed, and valve 2 is open.
6.2.3 Open valve No. 5 and confirm that the sending device has no pressure; open the quick opening blind plate of the sending device, and after confirming that there is no foreign matter in the sending device, clear the pipe
The device is fed into the bottom of the sending device and plugged tightly.
6.2.4 Wipe the sealing surface, apply calcium-based grease on the sealing ring, close the quick opening blind plate, and install the safety locking device.
6.2.5 Close the No. 5 valve.
6.2.6 Slowly open No. 4 valve and No. 3 valve to fill the sending device with aviation fuel.
6.2.7 After exhausting the air, close the No. 4 valve.
6.2.8 After receiving the on-site command order, open the No. 1 valve to fully open.
6.2.9 Slowly close the No. 2 valve and send out the pig.
6.2.10 After the indicator is sent, the No. 2 valve should be opened first, and then the No. 1 valve and the No. 3 valve should be closed in turn to resume the normal process.
6.2.11 After confirming that the No. 1 valve and the No. 3 valve are completely closed, open the No. 5 valve and the No. 4 valve in sequence to empty the aviation fuel in the sending device.
After emptying, close valve 4 and valve 5.
6.2.12 During pigging operations, unless special circumstances occur, adjustments to pipeline conditions or shutdown of pipelines should be avoided.
6.2.13 When pigging operations on the trunk line with branch pipelines, it is advisable to arrange the branch line temporarily for a period of time before and after the pig will pass the branch point.
Stop the oil transportation and confirm that the pig has passed, and then resume the oil transportation operation of the branch line.
6.3 Pig tracking
6.3.1 When pigging is performed for the first time, irregular pigging operations or when the pig is stuck in the pipeline and a second pig needs to be sent, the pig should be installed
Install a signaling device to track along the pipeline.
6.3.2 Before sending the pig, the tracking point should be determined according to the pipeline condition, and the sending device and receiving device should be adjusted to working status.
6.3.3 The tracking personnel should bring the receiving device and communication equipment to the tracking point in advance to wait for the pig to pass.
6.3.4 If the signal from the transmitter is not received after waiting for more than 30 minutes, a group of personnel should be left on-site to continue waiting.
Contact the monitoring center from time to time to determine whether the pig is jammed according to the change of the delivery pressure curve, and find out the exact location of the pig.
6.3.5 Tracking personnel should keep track of records.
6.4 Receipt of the pig
6.4.1 All preparations for receiving the pig should be done 1 hour before the pig reaches the receiving station.
6.4.2 Dynamically monitor the appearance of the oil product through a closed-circuit sampler installed on the pipeline. When the appearance of the oil product changes, the receiving station should cut
Change to the receiving process, see Figure 2.
Figure 2 Flow chart of pig receiving
6.4.3 Switch the receiving process according to the on-site command instruction. The No. 1 valve and No. 3 valve should be opened slowly, and the No. 2 valve should be closed slowly after they are all opened
The valve allows aviation fuel to enter the recovery tank.
6.4.4 When the receiving indicator is activated and the receiving device is used to confirm that the pig enters the ball receiving device, continue to observe the appearance of aviation fuel.
6.4.5 After the appearance of aviation fuel returns to normal, slowly open the No. 2 valve, close the No. 1 and No. 3 valves, and return to the normal flow.
6.4.6 Open valve 4 and valve 5 to empty the aviation fuel in the receiving device, open the blind plate, clean up the impurities in the receiving device, and remove
Pipe.
6.4.7 Flush the receiving device and close the quick opening blind plate.
6.4.8 The removed impurities should be treated in accordance with environmental protection requirements.
6.4.9 The dirty oil generated by pigging operations should not enter the filter and flow meter process pipeline.
7 Emergency
Emergency preparations and disposals should be made according to the emergency plan.
8 Data collation and summary
8.1 The contents of the pigging operation data report include.
a) The names of the first and last stations of the pigging pipe section;
b) Length of pigging pipe section;
c) Pigging pipe section specifications;
d) Pig type and interference;
e) Pig sending and receiving time;
f) The maximum pressure of the pipeline out of the station during the pigging operation;
g) The maximum relative height difference of pigging pipe section;
h) The average running speed of the pig;
i) The amount of impurities in the receiving device;
j) Total amount of sewage discharged from pigging operations, etc.
8.2 The general description of the pigging process includes.
a) The operating status of the pig;
b) The time when the operating pressure reaches the maximum and the location of the pig at that time;
c) Pig position at the fastest operating speed;
d) The position of the maximum pressure difference pipe section;
e) The emptying and sewage discharge of pigging operations;
f) The pipe cleaner removes impurities;
g) After the pigging operation, the status of the pig itself, etc.
8.3 Description of abnormal conditions during pigging process include.
a) Analysis of the causes of failures and accidents during the pigging process;
b) The location, structure and topography of the pipeline;
c) Pollution caused by abnormal discharge and emptying;
d) Emergency repairs, emergency situations, etc.
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