China Shenzhen Wofly Technology Co., Ltd. Company News

  The main purpose of the electronic special gas cabinet is to safely transport special gas; No external pollution and fine particles in the gas in the filter through the filter. The main requirements of the main requirements are safety, and the main risk of special gas cylinders is that there is a harmful gas in the case of the cylindrical cylinder valve without being killed or the pipeline; (2) After converting the cylinder joint after the bottle (the pig tail lineage joint ) Not connected, causing the gas overflow when opening the bottle. The following is detailed by Woy Fei Technology, with the safety requirements for special air cabinet cylinders.   Special gas cabinet cylinder safety operation procedures: 1. Non-experimental persons are strictly prohibited from contact with gas cylinders and related valves. 2. It is strictly forbidden to hit the impact during operation, pay attention to the pressure gauge reading, regularly check the valve and pipeline to ensure no leakage. 3. When replacing, make sure the new gas bottle is clear and complete; during the handling process, it should be lightly put it. Only when the gas cylinder is stable, you can let go. 4. The cylinder should be stored in a cool, dry, away from the heat source, and place the ground of the gas cylinder must be flat, the safety cap on the cylinder should be tightened to protect the valve. Do not turn it. 5. When using a nitrogen bottle, the bottle valve is used first, and then the decompression adjustment screw slowly rotates the gas out. Use the PP gas bottle valve, and turn out the pressure in the pressure reducer, then remove the decompression air conditioner screw.     Special gas cabinet cylinder storage safety requirements: 1. It should be placed in a special warehouse storage, and the gas cylinder warehouse should comply with the relevant provisions of the "Building Design Fire Prevention Specification"; 2. There is no gutter in the warehouse, dark road, strictly forbidden to open fire and other heat sources, in the warehouse should ventilate, dry, avoid direct sunlight; 3. Control the temperature in the warehouse, specify the storage period; 4. It is strictly forbidden to heating the gas cylinder with a heat source of more than 40 ° C; 5. The gas cylinder should be properly equipped with a bottle cap. When putting the place, it should be properly fixed; when it is placed, the head is in the same direction; 6. Confirm the steel printing and color tag of the gas cylinder, confirming gas cylinders that do not meet the safety technical requirements; 7. Empty bottles are inspected, and the gas in the bottle is not exhausted, and there must be remaining pressure; the remaining pressure of the gas cylinder should not be less than 0.05 MPa. 8. Cylinder bottle shoulders have the specific time of the next test, which can be put down this time. It is time to send to specialized testing mechanism tests to be bottle. It is generally two years to detect once. 9. The empty bottle should be placed separately and have obvious signs; with toxic gas cylinders and bottle gas can cause combustion, explosion, gas cylinders that produce poisons, and store them in the vicinity of gas utensils or Fire extinguishing equipment; The special gas cabinet mainly used special gases, such as flammable, explosive, highly toxic, etc., mainly for semiconductors and LEDs.    

  Single station system - In some applications, gas is only used to calibrate the instrument. For example, a continuous emission monitoring system (CEMS) only need to calibrate the gas for a few minutes a day. This application clearly does not require a large-scale automatic conversion manifold. However, the design of the delivery system should prevent the calibration gas from being contaminated and minimizes cost related to the replacement of the cylinder. Single-way manifold with brackets is an ideal solution for such applications. It provides a safe and efficient connection and replacement of cylinders, without struggle with the regulator. When the gas contains a corrosive component such as HCl or NO, a purge assembly should be mounted in the manifold to purge the regulator with an inert gas (usually a nitrogen) to prevent corrosion. Single / station manifold can also be equipped with a second tail. This arrangement allows access to additional cylinders and keeps standby. Switching is manually accomplished using the cylinder cutoff valve. This configuration is usually suitable for calibrating gas because the precise mixing of the ingredients usually varies from cylinders. Semi-automatic switching system - Many applications need to be used continuously and / or larger than the amount of gas actually used by single-station manifold. Any suspension of gas supply can cause experimental failure or destruction, productivity loss or even the entire facility downtime. The semi-automatic switching system can switch from the main gas bottle or spare gas cylinder without interrupting, minimizing the cost of high downtime. Once the gas bottle or cylinder group consumes exhaust, the system automatically switches to the spare gas cylinder or the cylinder group to obtain a continuous gas flow. The user then replaces the gas bottle as a new cylinder, while the gas still flows from the reserve side. The two-way valve is used to indicate the main side or the spare side when replacing the cylinder.    

  The centralized gas delivery system is actually necessary when a large amount of gas is used. A well-designed delivery system will reduce operating costs and improve productivity and enhance safety. The centralized system will allow all cylinders to be merged into a storage location. Centralize all cylinders to simplify inventory control, simplify and improve steel bottled. Gas can be separated according to type to improve safety. In a centralized system, the frequency of replacing the cylinder is lowered. It is achieved by connecting multiple cylinders to the manifold in the group, so a group can safely exhaust, supplement, and purge, while the second group provides continuous gas services. This type of manifold system can supply gas for a variety of applications or even the entire facility without having to equip each use point. Since the cylinder switching can be done automatically by the manifold, a row of gas cylinders will be even exhausted, thereby increasing gas utilization and reduces cost. Since the cylinder replacement will be carried out in isolation, controlled environments, the integrity of the delivery system will be better protected. The gas manifold used in these systems should be equipped with a check valve to prevent gas reflow and clear assemblies from eliminating the replacement of contaminants into the system. In addition, most gas delivery systems can be configured to indicate when to replace the cylinders or gas cylinders. Purity The gas purity level required for each use point is extremely important to design gas delivery systems. The gas purity can be simplified using a centralized system as described above. The choice of construction materials should always be consistent. For example, if you use a research grade gas, all stainless steel structures and no membrane sealing shut-off valves should be used to eliminate the pollution of the airflow. In general, the purity of three levels is sufficient to describe almost all applications.   The first stage, is commonly described as multi-purpose applications, with the least stringent purity requirements. Typical applications may include welding, cutting, laser assist, atomic absorption or ICP mass spectrometry. Manifold for multi-purpose applications has been economically designed to ensure safety and convenience. Acceptable building materials include brass, copper, TEFLON®, TEFZEL® and VITON®. Fill valves, such as needle valves and ball valves, are typically used to cut off flow. The gas distribution system manufactured at this level should not be used with high purity or ultra-high purity gases. The second level is called high-purity applications that require higher levels of anti-pollution protection. Applications include laser resonant cavity gases or chromatography, which uses capillary columns and system integrity is important. The structural material is similar to the multi-purpose manifold, and the flow cutoff valve is a diaphragm assembly to prevent contaminants from spreading into the airflow.     The third stage is called ultra-high purity applications. This level requires the components in the gas delivery system to have the highest level of purity. Trace measurements in gas chromatography are an example of ultra high purity applications. This level of manifold must be selected to minimize the adsorption of trace components. These materials include 316 stainless steel, TEFLON®, TEFZEL® and VITON®. All pipes should be 316sss cleaning and passivation. The flow shutoff valve must be a diaphragm assembly. Recognizing that components suitable for multi-purpose applications may adversely affect the results of high purity or ultra-high purity applications, this is especially important. For example, the exhaust gas of the neoprene diaphragm in the regulator can lead to excessive baseline drift and unsolved peaks.  

  1. Whether design is standardized to check Design is the main basis for engineering construction, and some professionals have strictly reviewed design specifications. To maximize the restrictions on the restrictions such as designer's ability to limit, the construction environment is limited, resulting in a large amount of change in the field pipeline installation, causing insufficient argument, not accurate design, and the drawings are incomplete. 2. Construction team staff qualification review must be strict Because the phenomenon of the guarantee is absolutely avoided, some construction teams do not have a strict restrictive organizational system, some people have unlicensed laid. At the same time, even a professional team, there are also causes of personnel flow replacement, technical update, and highlight the phenomenon of employee professional technical quality. In particular, the proportion of special operations in the pipeline installation must have a strict control review of the qualifications of the construction team.       3. The construction management standard for pipeline installation is high. If the prefabrication of the pipe should be well-organized. Such a precious metallic material such as the Harfa alloy, aluminum materials and the surface anti-pollution requirements of the pipeline, such as directly on site construction, focusing on the management of protection measures and environment; for the pipeline between the combined equipment, by equipment manufacturers According to the equipment positioning situation in the factory, there is a special structure of the strict jacket, and the pipelines are required to have special structures in the pipeline should be considered for the entrustment of manufacturers with mechanical processing qualifications. At the same time, to avoid pipe installations are not in place, so that the construction site is confusing, resulting in damage, and does not occur in standard materials.

Under normal circumstances, the substances used in the experiment are toxic, so there is a lot of safety hazards in various parts and related ventilation lines in the ventilator. This requires us to determine the elimination risk factor before implementing various inspections and maintenance. Any staff engaged in maintenance inspections must protect equipment such as masks, protective masks, protective glasses, acid-based gloves, etc.). In the process of experiment, if there is a dangerous condition, we must immediately eliminate the danger to continue to maintain the wind cabinet. In the chemical experiment, there is often a variety of unpleasant, corrosive, toxic or explosive gases. If these harmful gases are not in time to exclude outdoor, they will cause indoor air pollution, affect the health and safety of experimental personnel; affect the accuracy and service life of the instrument equipment. Air Flow Window of Laborary 1. dedicated to maintain laboratory fume hood main material, regular cleaning, multi-wiping, keep the plate surface clean. 2. a smooth surface countertops available epoxy flannel wipe clean, dry cloth or wipe light. 3. the surface of solid physiochemical board table mild hot water is recommended, acetone or cleaning properties cleaning ingredients do not use abrasive cleaner, to avoid damage to the table. For stubborn stains, contamination may be hypochlorous acid droplets in the experiment table plate can be washed away with water after 1.5 minutes. 4. paint spraying and then use the portion of the cleaning solution to clean the fine quality, to avoid contact with sharp objects leave scratches, must not be sanded to be noted that the holding surface of the dry everyday situations. 5. pp plastic materials and cleaning agents should first be sprayed on the surface, and then scrub brush moistened sparingly water until surface dirt was completely cleared, then wiped clean towel-dry soil. Detergent dilution ratio severity visible dirt, are generally to be made lean to rich. 6, maintenance of stainless steel materials 6.1. The laboratory ventilator should avoid using a detergent containing bleached ingredients and abrasives, and wireball 'grinding tools, and the like. In order to remove the detergent, the surface is rinsed with clean water at the end of the detergent. 6.2. Trademarks of stainless steel surfaces, film films, such as washing, binder ingredients, use alcohol or organic solvent (ether, stupid). 6.3. If there is a variety of acid surfaces, it is immediately rinsed with water, and then dried with aqueous ammonia solution or a neutral carbonate. 7. the maintenance of the attachment, the attachment mainly includes hinges, screws, handles, etc., which are generally sprayed with stainless steel or steel surface, and the spray treatment is mainly in use. You should pay attention to the following points: 7.1. avoid salt, acid, base, etc., directly on it, if it is accidentally happened, washed with water and wipe it with a dry cloth. 7.2. door hinges should be treated regularly and prevent long-term moisture. 8. keep the sewers are smooth and prevent clogging. 9. the sink and the countertops should be kept clean, such as water stains, apply rag to dry. 10. pay attention to the use of materials such as hoses, sealing materials.

1. Features of the laboratory air supply system: 1.1 Features: The laboratory requires a constant carrier gas flow, high gas purity, and provides a gas for analyzing equipment for the laboratory to provide quantities and stable gas. 1.2 Economic: Building a concentrated gas cylinder can save limited laboratory space, do not need to cut off when replacing the cylinder to ensure continuous supply of the gas. Users only manage fewer cylinders, pay less steel bottle rent, because all used points used in the same gas come from the same gas source. Such a supply method will ultimately reduce transportation, reducing the amount of retarding gas in the air bottle of gas company, as well as good cylinders management. 1.3 usage: Centralized pipe supply system can place gas outlets in use, such a more reasonable design workplace. 1.4 security: to ensure its storage and use of security. Safeguards the analysis tester from being infringed by the toxic and harmful gases in the experiment. 2. Hazard of laboratory gas 2.1 Some gases have flammable, explosive, toxic, strong corrosion, etc., once they leak, may cause harm to staff and instrument equipment. 2.2. A variety of gases are used in the same environment. If there are two gases that have strong chemical reactions such as combustion or explosions, they may cause injury to staff and instrument equipment. 2.3 Most of gas cylinders are up to 15MPa, namely 150 kg / cm2, if the air bottle decompression device is out of the decompression device, it is possible to eject some parts, and its energy has fatal injury to the human body or equipment. .

  The gas mixer is an important part of the factory centralized gas supply. It has more and more people recognize its importance, stable and accurate protective gas can improve the quality of the weld, and reduce the number of defective products. Save the production cost of the factory and improve economic benefits.   At the same time, the gas mixer is also a very convenient device. After the installation is installed, it is generally available in eight to ten years. The gas mixer is durable, and it is still necessary to pay attention to it during use. 1. The gas mixer is placed at a horizontally ground to avoid vibration. 2. Gas mixers should keep drying and clean 3. When the gas mixer does not use the gas mixer, turn off the input valve to prevent the input pressure from being over, damage the internal parts. 4. The input pressure of the gas should be within the specified range, and the range of the gas ratio and output traffic may not be used. 5. It is forbidden to use corrosive gases when performing gas ratio 6. During use, pay attention to observing whether the gas distribution cabinet has a phenomenon. 7. If the comparator fails, if the matching value is offset, the output traffic is unstable, do not disassemble,  

1.Conditions and preparations for craft pipe test pressure The pipeline system is completed and compliant with the design requirements and regulations. The branch, the hanger and the pipe rack are finished, and the ray flaw detection has completely reached the design specifications, and the part of the test, weld and other should be tested is not painted and incubated. The test pressure gauge has been verified, the accuracy is set to 1.5, and the full scale value of the table should be 1.5 to 2 times the maximum pressure measured. Before the test, the test system, equipment and attachments will not be involved in the test system, and the position of the blind board is used to apply the white lacquer lacquered mark and record. The test water should be used with clean water, and the chloride ion content in the water must not exceed 25 × 10-6 (25 ppm). The temporary pipeline for the test is reinforced, and the safety and reliability should be checked.Check if all valves on the pipe are on the open state, whether the spa 2. Process pipeline test 2.1.Pipe test pressure is 1.5 times the design pressure. 2.2. When the pipeline and equipment are tested as a system, the test pressure of the pipe is equal to or less than the test pressure of the device, and the test pressure of the device is not less than 1.15 times that of the pipe design pressure, and can be tested according to the test pressure of the equipment. 2.3.When the system is injected, the air should be exhausted, the air discharge point should be the highest point of the pipeline, and add a exhaust valve. 2.4. For pipelines with larger differences, the static pressure of the test medium should be measured in the test pressure. The test pressure of the liquid pipe should be subject to the pressure on the highest point, but the lowest point pressure must not exceed the tube components. 2.5. When the pressure is pressed, the boost should be slow, and after the test pressure is reached, it is regulated for 10 min, and there is no deformation without leakage. The test pressure drops to the design pressure, stops 30 minutes, and the pressure does not fall, no leakage is qualified . 2.6. After the test, the blind plate should be removed in time, and the water is placed, and the negative pressure should be prevented when drained, and it should not drain the water. When the leak is found during the test, it should not be processed, after eliminating the defect, it should be re-examined. 2.7. The leakage test was performed after the pressure test was passed, and the test medium used compressed air. 2.8. Leakage test pressure is designed to design pressure, leak test should focus on checking the filler, flange or threaded joints, vent the valve, exhaust valve, drainage valve, etc., with the foaming agent inspection without leakage. 3. craft pipe purge and cleaning 3.1. Process technology requirements 3.1.1. Process pipeline should be segmented and cleaning (referred to as purging). 3.1.2. The blowing method is determined according to the requirements of the use of the pipeline, the dirty procedure of the surface of the working medium and the inner pipe is determined, and the hair drying sequence is generally carried out in accordance with the supervisor, branch pipe, and discharge tube. 3.1.3. Before blowing, the instrument within the system should be protected and remove the orifice plate, the filter adjustment valve and the retracted valve body, etc., properly, and the like. 3.1.4. When purging, the dirt in the pipe should not enter the equipment, and the dirt blown out of the device shall not enter the pipe, the valve flange is added. 3.1.5. Pipe purging should have sufficient flow, and the purge pressure must not exceed the design pressure, and the flow rate is generally not less than 20 m / s. When purging, apply a wood hammer to beat the tube, and focus on the weld and the bottom of the pipe, but must not damage the pipe . 3.1.6. Pipe branch should be considered before blowing, and the rigging of the hanger should be reinforced when necessary. 3.2. Pipe purification, cleaning method 3.2.1. Water rinsing: Working medium is the pipeline of the water system. Water rinsing may reach the maximum flow rate or not less than 1.5 m / s in the tube. It is qualified for export water and transparency with the entrance. After the pipe is rinsed, the water should be exhausted in time. 3.2.2. Air purging: Working medium is gradually purged with compressed air segments for gas pipelines. If you meet the valve, you must remove the front flange to the docking board, and then reset it after the pipe is blown. The pressure must not exceed the container and pipe design pressure, and the flow rate should not be less than 20 m / s. During the air purge, when the exhaust gas is not smoking, the exhaust port is placed in the exhaust port to test the lacquered wooden target, and there is no rust, dust, moisture, and other debris on the target plate in 5 min. 3.2.3. Steam purge: The working medium is purged with steam in the steam pipe. Steam is purged before the warm tube should be slow, then naturally cool down to ambient temperature, then lift the warm tube, carry out the second purge, so repetition is generally not less than three times. The exhaust gas in the vapor purge is tilted upwards, and the mark is eye-catching. The exhaust pipe diameter should not be less than the diameter of the purge tube. Qualified standard: Double replacement targets for two consecutive times, such as the spots visible to the naked eye on the target plate size below φ 0.6mm, the depth of depth is 1 / cm2; the purge time is 15 minutes (ie two In the case of a pass, it is passed.

  In the gas system application industry, whether it is a laboratory gas pipeline system or a semiconductor electronic special pipeline system, it is inseparable from the use of reduction valve. It is well known that a high-quality high-purity gas system can have a good impact on the qualification rate of the product and the quality of the boutique, but also guarantee the smooth and stable experiment. A high-quality high purity gas system has a source of each system, which is less than a high quality reduced pressure valve.     As a result of the industry-leading high-end intelligent gas delivery integrator, Shenzhen Wofly Technology Co., Ltd. (hereinafter referred to as "Woy Fei Technology"), in the long-term development, in terms of the performance of the product and customer usage satisfaction The pursuit is never endless, always remembering "innovation is the first productive" and "technological winning, quality assurance" spiritual concept and business philosophy, Toy Fei Technology has a comprehensive upgrade of "AfkLok" series pressure reducing valve The composition of each component of the pressure reducing valve is optimized and updated. Functional Structure of Pressure Regulator Pressure regulator is the most commonly used valve device for gas pipeline project. The main function of the reduced pressure valve is to adjust the stable gas pressure, which can adjust the high pressure gas to the pressure size required to use the device, thereby meeting the needs of the equipment. It can be said that the effect of the pressure reducing valve is indispensable, it achieves the conversion of the gas from the supply of gas to the use.   Optimization analysis of each component of the pressure regulator. Pressure Regulator consists of a valve body, a valve stem, a nut, a spring, a diaphragm, a valve cap, and the like. Here we specifically introduce the optimization of the components of Wofly Technology "Afklok" series of pressure regulating valves. 1.Diaphragm The diaphragm is the most critical component of the pressure reducing valve. The AFKLOK decompression valve diaphragm is made of imported Khastan alloy strip manufacturing (the international first-line equivalent valve film), this alloy material has the strongest corrosion resistance and anti-fatigue strength (durability), which can greatly increase decompression The service life of the valve membrane.   2.Valve Body 2.1 it is good to see a valve body, and you can see it. The valve body of the AFKLOK pressure reducing valve is Ba grade, and the valve body flow channel is smooth,     4.1 Valve stem, nut, etc. Overall, after a comprehensive optimization upgrade, after testing, the AFKLOK decompression valve can compare the same level of pressure reducing valve in the international first-line, at the same time, at the same size, AFKLOK pressure reducing valve compared to the peer pressure relief valve The flow that can be used is larger.

  1.Whether design is standardized to check Design is the main basis for engineering construction, and a full-time personnel must strict review of designing norms. It is necessary to prevent the maintenance of the designer's ability to topical, the construction environment is contained, resulting in a large amount of change in the installation of the on-site pipeline, causing insufficient argument, not accurate design, and the drawings are not perfect. 2. The construction management standard for pipeline installation is high If the prefabrication of the pipe should be intended. Such a precious metal material such as the Hartse alloy, pipe, etc., the installation environment and surface anti-pollution requirements are high. If the construction directly on site, the management of protective measures and the environment should be increased; the pipeline between the combined equipment is based on equipment manufacturers The equipment positioning is prefabricated in the factory. It has a special structure of the strict jacket and the pipeline within the pipeline, and it is necessary to consider prefabrication of manufacturers who have entrusted mechanical processing qualifications. At the same time, to avoid pipeline installations are not in place, so that the construction site is confusing, resulting in damage to the material, and does not occur according to standard materials.       3. Construction team staff qualification review must be strict. Due to the unfairness of the construction team, there is no strict organizational system in the construction team, and some people have unlicensed. At the same time, even a full-time team, there are also causes of personnel flow replacement, technical updates, and highlight the technical quality of employees. In particular, the proportion of special operations in the pipeline installation process must strictly control the construction team staff qualifications. More information, pls visit: www.afkvalves.com  

1. Nitrogen pipeline construction should follow the specifications “Specification for industrial metal pipeline engineering and acceptance” “Oxygen station design specification” “Regulations on safety management and supervision of pressure pipelines” “Specification for degreasing engineering and acceptance” “Specification for construction and acceptance of welding engineering of field equipment and industrial pipelines” 2. Pipeline and accessories requirements 2.1 All pipes, pipe fittings, and valves must have ex-factory certificates. Otherwise, check the missing items and their indicators should meet the current national or ministerial standards. 2. 2 All pipelines and accessories should be visually inspected, such as whether there are defects such as cracks, shrinkage holes, slag inclusions and heavy leather to ensure that the surface is smooth and clean; for the valves, strength and tightness tests should be carried out one by one (the test pressure is the nominal pressure 1.5 The pressure holding time is not less than 5 minutes); the safety valve should be debugged more than 3 times according to the design regulations. 3. Pipe welding 3.1 In addition to meeting the requirements of the drawings, the welding technical conditions should be carried out in accordance with international regulations. 3.2 The welds should be inspected by radiographic or ultrasonic in accordance with the specified quantity and quality level. 3.3 Welded carbon steel pipes should be backed with argon arc. 4. Pipeline degreasing and rust removal Use sandblasting and pickling to remove rust and degrease the inner wall of the pipeline. 5. Precautions for pipe installation 5.1 When the pipeline is connected, it must not be forcefully matched. 5.2 Check the straightness of the butt connector of the nozzle. Measure port at a distance of 200mm. The allowable deviation is 1mm/m, the total length deviation is less than 10mm, and the connection between the flanges should be parallel. 5.3. Use threaded connectors to apply PTFE with packing, and it is forbidden to use sesame oil. 5.4. The pipe and the support should be separated by a non-chloride ion plastic sheet; the pipe through the wall should be sleeved, and the length of the sleeve should not be less than the wall thickness, and the gap should be filled with non-combustible materials. 5.5. The nitrogen pipeline should have lightning protection and electrostatic discharge grounding devices. 5.6. The depth of buried pipeline is not less than 0.7m (the top of the pipeline is above the ground), and the buried pipeline should be treated with anticorrosion. 6. Pipeline pressure test and purge After the pipeline is installed, conduct a strength and tightness test, and the regulations are as follows: Working pressure MPa Strength Test Leak Test Media Pressure（MPa） Media pressure（MPa）

  1.Steps According to the elevation datum given by the civil engineering, mark the elevation datum line on the wall and foundation column where the pipeline needs to be installed; install the pipeline bracket and hanger according to the drawing and number; install the pipeline according to the pipeline installation drawing and the prefabricated number of the pipeline; Adjust and level the slope of the pipe, fix the pipe support, and position the pipe. 2.Request The slope direction and gradient of the pipeline should meet the design requirements; the slope of the pipeline can be adjusted by the metal backing plate under the support, and the hanger can be adjusted by the boom bolt; the backing plate should be welded with the embedded parts or steel structure, It should not be caught between the pipe and the support. Flanges, welds and other connecting parts should be arranged for easy inspection and repair, and should not be close to the wall, floor or pipe frame. When the pipeline traverses the floor slab, a protective tube shall be installed, and the protective tube shall be 50mm above the ground. When the pipeline traverses the floor slab, a protective tube shall be installed, and the protective tube shall be 50mm above the ground. The form and elevation of the support and hanger should conform to the requirements of the drawings, and the fixing position and fixing method should conform to the design and be flat and firm. Rows of horizontal or vertical pipelines should be neat, and the valve installation positions on the rows of pipelines should be consistent.       3.Installation Pipeline installation is divided into systems and pieces. The main pipe first, then the branch pipe. The branch pipe from the main pipe should be installed after the main pipe is positioned. Century Star introduced that the pipeline connected to the equipment must be carried out after the equipment is leveled. The flange connection should be concentric with the pipeline, and the flanges should be parallel. The deviation should not be more than 1.5% of the outer diameter of the flange and not more than 2mm. The bolt holes should ensure that the bolts can penetrate freely, and the bolts should not be penetrated by forced methods. . The two planes of the gasket should be flat and clean, and there should be no radial scratches. Flange connection should use bolts of the same specification, and the installation direction should be the same. When gaskets are needed, each bolt should not exceed one, and the bolts and nuts after tightening should be flush.