管道燃气自闭阀选型手册簿

燃气自闭阀简介
1.什么是燃气自闭阀？
2022年，国家新实施了《燃气工程项目规范》GB55009-2021（简称《规范》），文件中6.1.9规定：家庭用户管道应设置当管道压力低于限定值或连接灶具管道的流量高于限定值时能够切断向灶具供气的安全装置；设置位置应根据安全装置的性能要求确定。

《规范》中提到的安全装置，也就是燃气自闭阀。

自闭阀的安装其实是为了给我们的安全多加一层防护网。

2.燃气自闭阀功能
当燃气自闭阀感应到管道供气压力低于或高于限定压力允许范围时，会自动关阀、切断气源，防止燃气事故发生，消除隐患后需人工手动重新开启自闭阀。

家中燃气自闭阀自动关闭情况有：
（1）家中停气或未通气时，自闭阀会自动关闭并始终保持关闭状态，防止重新供气产生燃气泄漏。

（2）在调压设备老化、故障及维修、抢修抢险作业时，如果引起供气超压，燃气自闭阀会自动切断气源，故障排除后即可重新安全用气。

（3）如果燃气软管老化、脱落时，燃气自闭阀也会自动关闭切断气源，保证用户安全。

3.燃气自闭阀操作
燃气自闭阀不需要接电源或使用电池，它是通过监测燃气流量或压力异常而自动关闭。

正常通气状态下，如遇自闭阀关闭，在确认家里无软管脱落或燃气泄漏的情况下，只需轻轻将自闭阀提扭拉起即可。

燃气管道工程技术手册设计证书编号：311023-sj甲级前言为了保证设计人员的设计能力和设计水平，满足我院业务发展的需要，同时为了统一本院设计标准、规范设计内容，提高整体设计质量和工作效率特制定本手册。

本手册的编制是本着贯彻国家和地方有关方针、政策、法律、法规和强制性标准，有利于我院技术进步的原则，积极采用推荐国家强制性标准和行业标准。

在严格执行现行国家及行业标准的基础上，本手册意在为设计人员提供更多必要的设计参数，在保证设计施工图的合理性、降低消耗、减少浪费方面起到一定的作用。

同时结合公司发展方向，广泛征求了相关人员的意见，进行整理、分析，力求使手册更具有实用性、合理性和指导性。

此次本手册的内容主要包括了城镇中低压燃气管网、城市居民用户、商业用户及工业用户燃气工程等常规业务的设计基本知识和相关技术要求。

手册中引用了大量国家和行业标准的有关内容，这些标准、规范在引用时应注意当前的有效版本，引用的有关内容将随着标准的修订而被修改，均以最新的标准版本为准。

由于各相目公司遍布全国各地，各地区的情况和习惯做法又千差万别，所以设计人员应在严格遵守国家及行业标准、规范的前提下，对手册的内容灵活运用。

在手册执行的过程中，我们诚恳地希望大家将遇到的问题及时反馈给设计分院，以便使手册的内容得到不断的补充、修改和完善。

目录第一章基本规定3第一节绘图基本要求及设计图例 3一、燃气专业制图的一般规定 (3)三、燃气专业设计制图标准 (5)四、燃气专业设计图例见附录一。

................... 错误！未定义书签。

第二节燃气管道施工图设计文件9一、设计文件组成： (9)二、设计文件内容： (9)三、填写的几点要求： (10)四、施工图上的说明内容： (10)五、设计文件的格式规定： (10)第三节常用技术标准11一、国家标准 (11)二、行业标准 (15)三、标准应用： (16)第二章燃气管道施工图设计18第一节设计需收集的资料18一、室内燃气管道施工图设计需收集的资料 (18)二、室外燃气管道施工图设计需收集的资料 (18)三、调压器室燃气管道施工图设计需收集的资料 (19)四、锅炉房（直燃机）燃气管道施工图设计需收集的资料 (19)五、燃气管道跨越工程支撑设计需收集的资料（工艺专业提供给结构专业）20第二节管材及附件的选用20一、室内燃气管道的管材及管件选用 (20)二、室外燃气管道的管材及管件选用 (21)三、聚乙烯管材、管件的使用规定 (21)四、穿跨越工程管材的选用 (22)第三节设计参数及计算方法23一、燃气小时计算流量的确定 (23)二、燃气管道摩擦阻力计算 (25)三、低压燃气管网压降及压降分配 (27)四、常用燃气管道规格的计算 (27)第四节施工图设计要点31一、室内燃气管道工程施工图设计要点： (31)（一）管线位置 (31)（二）阀门位置 (31)（三）活接头位置 (32)（四）套管的设置 (32)（五）管卡或支架（托架）的设置 (32)（六）燃气表的安装 (32)（七）燃气燃烧器具的安装 (32)（八）对燃具给排气设施和排烟设施的安装要求 (33)（九）商业用户、工业企业设计要点 (34)（十）锅炉房（直燃机）燃气管道设计要点 (34)（十一）对于高层建筑的室内燃气管道系统应考虑的问题： (35)（十二）特殊场所安装燃气设施的要求： (36)（十三）燃气管道及设备的防雷、防静电设计应符合下列要求： (37)（十四）室内燃气管道施工图需要注意的事项有： (38)二、室外燃气管道工程施工图设计要点： (39)（一）高、中压管线的平面布置原则 (39)（二）高压管道设计需注意的事项： (40)（三）中压管道设计需注意的事项： (41)（四）低压管网的平面布置原则 (42)（五）中、低压庭院管网设计应注意的几点： (43)（六）设计室外架空燃气管道应注意的几点： (45)（七）管道的纵断面布置原则 (46)三、调压室燃气管道施工图设计要点： (46)第五节主要设备的选用和安装47一、燃气计量表 (47)（一）燃气计量装置选型的基本原则 (47)（二）燃气计量表装置的设置要求 (48)（三）燃气表安装位置确定 (48)（四）燃气表的保护装置 (49)（五）燃气表的安装场所 (50)二、调压装置的安装 (50)（一）调压装置的选择原则 (50)（二）调压装置的设置要求 (50)（三）调压装置的工作环境 (51)（四）调压器的安装调试应按照设备说明书和有关要求进行。

燃气自闭阀的开关操作方法
燃气自闭阀的开关操作方法如下：
1. 开关操作前，确保燃气供应管道的放气阀门已关闭，以确保安全。

2. 确认燃气自闭阀的开关位置。

通常，阀门顺时针方向旋转为关闭，逆时针方向旋转为开启。

3. 使用适当的工具（如扳手）转动阀门操作杆，将其旋转到所需的位置。

记住，不要用力过猛，以免损坏阀门。

4. 在完成开启或关闭操作后，检查阀门是否处于正确位置。

确保阀门的开关状态与所需操作相匹配。

5. 开关操作完成后，打开燃气供应管道的放气阀门，并检查阀门周围是否有燃气泄漏的迹象。

6. 如果发现燃气泄漏或其他异常情况，请立即关闭燃气供应，迅速通知相关部门或专业人士进行处理。

请注意，以上是一般的操作方法，具体的操作步骤可能因不同类型和品牌的燃气自闭阀而略有不同。

在进行操作前，请务必参考燃气自闭阀的使用说明书，并在需要时请咨询专业人士的建议和指导。

| 2022Auspex Gas ManualAuspexin your closest Reece store or downloadNominal DiameterBendingRadius (R)Without AidBending Radius(R) withBending SpringBending Radius(R) withBending Tool16 5 x d a 2.0 x d a20 5 x d a 3.0 x d a25 3.6 x d a32 3.6 x d a Note: All measurements in mm unless otherwise stated.Spacing of Supporting DevicesPipe Dimension Maximum Pipe Clip Clearance161000201250251500322000Note: All measurements in mm unless otherwise stated.See also AS/NZS 5601. Synthetic clips must be used.Example TemperatureDifferential ΔT50 kPipe length L 5 mCoefficient of expansion a0.026 mm/m.KLinear expansion ΔL 6.5 mmΔL= a x L x ΔT= 0.026mm/m.K x 5 m x 50 K= 6.5 mmThermal conductivity = 0.45 W/M x KThermal Changes in LengthHeating and cooling cause pipe length changes.The coefficient of expansion of Auspex Gas composite pipes is 0.026 mm/m x k.For further information on Linear Expansion T ables and other expansion bend examples contact your Auspex representative or customer service.between/across the fitting.Wrap the fitting by pulling the tape tight and removing the protective film. Completely cover the fitting. The tape will bond to itself within minutes and will cement to itself within a few hours forming an air and water tight seal.• Keep Auspex Gas pipe a minimum of 500mm fromsources of high heat, such as heating appliances and flues from heating appliances. If any hot joints are made in the line such as welding, the joints involved must be disconnected from the pipe and cooled completely before rejoining to the pipe• Keep Auspex Gas pipe 1500mm from slow combustion type stoves and flues used to heat hot water or cooking (wet back type)• Leave 300mm minimum space between Auspex Gas pipe and light fittings or other electrical fixtures • Auspex Gas pipe should not be positioned within 150mm of gas or central heating vents or flues •Where fire collars or the like are required, installers should contact the manufacturer of those products to ensure they have certification for MLP constructionChemical ResistanceAuspex Gas has been tested and certified to AS 4176.8. This standard covers multi-layer pipe and fittings in domestic gas installations for natural gas and LPG.Gas pipes must be protected from exposure to• Bitumen or bitumen strips • Greases, solvents, and oils•Contaminated areas as defined by AS/NZS 5601 and AS/NZS 3500Silicone Burial WrapWitness holesAuspex Gas FittingsThe Auspex Gas system has been specifically designed to be compatible with the one universal fitting for both water and gas. The Auspex Gas range of fittings are manufactured from dezincification resistance (DR) brass. The 16, 20, 25mm fittings have a copper ring and use the Auspex Crimp tool. The 32mm fittings are stainless steel crimp with a plastic ring and use the DuoPEX crimp tool.Reliable joint performance is maintained with witness holes. Witness holes are provided on the copper and stainless steel crimp rings to visually verify full insertion of the pipe into the fitting. Auspex hand crimping tools can be used up to 25mm, with the Rothenberger battery tool capable of all sizes.Auspex water fittings are available for Auspex Gas pipe in sizes 16mm to 32mm.Auspex Gas crimp fittings are classified as a permanent joint in accordance with AS/NZS 5601. As such, the fittings should not be able to move inside the pipe after crimping has been done.Pipe and fittings are joined and sealed by the deformation caused by correct crimping of the copper crimp ring in sizes 16mm to 25mm and similarly with the stainless steel crimp ring in 32mm.1.Multi-Layer Pipe 2a. Copper Crimp Ring OR 2b. Stainless Steel Crimp Ring 3.DR Brass Fitting16-25mm Internal – Pipe and Fittings 32mm Internal – Pipe and Fittings5. Insert the approved (16-32mm) yellow handlecalibrating/deburring tool into the pipe, and then alternately turn in a clockwise and in a counter-clockwise direction. Ensure that a consistent, smooth chamfer is formed on the end of the pipe.6. Push the pipe over the barbed fitting and at the sametime under the crimp ring. The fit should be firm. If the joint feels sloppy or hard to insert, check pipe and fittings. Do not use lubricants. Ensure the pipe is visible in the crimp ring witness hole.16mm to 25mm FittingsIt is extremely important that the tool instructions supplied with the tool are read in their entirety, and the user becomes familiar with the maintenance, precautions and the proper use of this tool.The following describes, in general terms, the jointing procedures but should not be regarded as a substitute for reading and applying the detailed instructions supplied with the tool.1. Select the correct tool and jaw size to suit the fittingto be crimped. The jaws must be examined in terms of possible damage or dirt in the compression area. 2. If utilising a battery operated tool, ensure that thebattery is fully charged and attach it to the tool.3. Insert the jaw and line up the holes in the tool with thehole in the jaw. Push the pin through the hole in the jaw and turn pin to lock. Ensure pin is locked into position prior to commencing crimp. T o change the jaw push the pin in and turn pin to unlock.witnesshole7. Make sure the tool jaws are centralised over the crimpring at 90° to the joint.When using the manual tool, close the tool completely to compress the crimp ring. The tool will click at final compression.When using the battery tool, press the switch until the crimp is completed.8. When using Auspex hand crimpers, check with thegauge supplied by sliding the opening of the gauge over the compressed ring. If the gauge passes over all parts of the ring without interference, then the joint has been done satisfactorily.If the gauge experiences any interference, the joint is under crimped. The tool should then be adjusted.4. Cut the pipe to the required length with therecommended multi-layer pipe cutters.7. Insert the approved (16-32mm) yellow handlecalibrating/deburring tool into the pipe, and then alternately turn in a clockwise and in a counter-clockwise direction. Ensure that a consistent, smooth chamfer is formed on the end of the pipe.8. Insert the pipe over the fitting and under the stainlesssteel ring and push the pipe until it is visible in the slots of the plastic sight ring (witness hole). This ensures youhave pushed the pipe home.9. By squeezing the back of the jaw, the jaws will open.If you look at the machined profile on the inside of the jaws you will note a slot on each side of the profile.32mm FittingsIt is extremely important that the tool instructions supplied with the tool are read in their entirety, and the user becomes familiar with the maintenance, precautions and the proper use of this tool.The following describes, in general terms, the jointing procedures but should not be regarded as a substitute for reading and applying the detailed instructions supplied with the tool.1. Ensure that the battery is fully charged and attach it tothe tool.2. Select the 32mm DuoPEX Gas jaw. The jaws must beexamined in terms of possible damage or dirt in thecompression area.3. T o change the jaw push the pin in and turn pin to unlock.4. Insert the jaws and line up the holes in the tool with thehole in the jaw.5. Push the pin through the hole in the jaw and turn pinto lock.6. Cut the pipe to the required length with therecommended multi-layer pipe cutters.witness holeAuspex Water fitting10. With the jaws open place the fitting inside the jaws sothat the raised section of the plastic sight ring fits intothe slot in the jaws. Release the jaws so they fit perfectlyover the fitting, ensuring that the raised section of theplastic holding ring is still located in the slots in the jaw.11. Press the switch mechanism until the joint is completedand the piston has retracted back into the body ofthe tool.12. Press the back end of the jaws and remove thecompleted joint.Crimping ToolAdjustment of Tool1. With the tool open,apply light pressureinwards.2. The handle should bepositioned somewherebetween 225-250mmapart.3. If adjustment is required,back off locking screw3-4 full turns.4. Turn adjusting screwin ¼ turn increments,adjusting screw slotshould finish in a verticalor horizontal position.5. Recheck opening ofhandle measurement.6. When set, tighten downlocking screw.7. Conduct a crimp andgauge check. Readjusttool if crimp notsatisfactory.RatchetingMove Ratchet Lever up ordown to suit movement.Nominal Adjustment225mm – 250mm.GaugeEnsure crimped connectionpasses through gaugeopening on all sides of thejoint.IMPORT ANT• A tool that is out of adjustment cancause a faulty joint• A tool that is set with excessive pressurecan damage both tool and fitting• A worn or damaged tool should bereplacedLockingScrewRatchet✓✗Trouble ShootingThe Auspex Gas system is simple and effective when executed in accordance with the jointing procedures in this manual. However, if sufficient care is not taken, this can result in an ineffective joint.If an ineffective joint is detected:• Cut out the defective joint and replace with new fittingNon-compliant fittings that are removed cannot be re-used.Pipe SizingThe following example is for natural gas using:• Supply Pressure 2.75kPa •Pressure Drop 0.75kPaPipe Section A →D A →B B →C C →D C →E B →F*Pipe Length 20551044Gas Flow MJ/h305165 + 85 + 55 = 30585 + 55 = 1405585165Fitting Correction0.8 + 1.7 + 1.7 = 4m Corrected Main Run 24m24m 24m 24m24m24m Nominal Pipe Size Corrected 32mm 25mm 16mm 20mm 25mm Nominal Pipe Size Uncorrected25mm25mm16mm 20mm25mm* In keeping with gasfitting best practice, if any value is close to the limit, upsize.Ineffective joints may occur if:• The crimping tool has not been completely closed• The crimping tool is out of adjustment. Re-adjust tool inaccordance with the instructions supplied with the tool, and in this manual• The copper ring has moved away from the fitting body • The crimping tool has not been centred over the copper ring and the jaw has overhung the end of the fitting • The crimping tool has not been at 90° to the joint being made• The pipe has been cut badly out of square• The witness hole is not completely filled (the fitting is not fully inserted in the pipe)•The fitting has been double crimpedJaw not square on the crimp ring✘Pipe badly cut and not square to fitting✘Fitting has been under crimped✘Jaw not centered on the crimp ring✘Witness hole not completely filled✘Fitting has been double crimped✘Examples of ineffective joints:Main Run A →D = 20 metres (from the meter to the furthest appliance)T eesCouplingsNatural GasLPG Natural GasPipe and FittingsCouplings 16mm x 16mm AP01161620mm x 20mm AP01202025mm x 25mm AP01252532mm x 32mm AP01323220mm x 16mm AP02201625mm x 20mm AP02252025mm x 16mm AP02251632mm x 20mm AP02322032mm x 25mmAP02322516mm – 25mm with copper rings and 32mm with stainless steel rings. 32mm fittings must be crimped with the battery tool using the 32mm DuoPEX jaw.Pipe Straight 16mm x 5m APG40160520mm x 5m APG41200525mm x 5m APG42250532mm x 5mAPG433205Pipe Coils 16mm x 50m APG40165020mm x 50m APG41205025mm x 50m APG42255032mm x 25mAPG433225Barrel Union Couplings 20mm AP20202025mm AP20252532mmAP203232LPGFittingsLugged Elbow (Female)16mm x 1/2" BSP AP071615F 20mm x 3/4" BSPAP072020FTees16mm x 16mm x 16mm AP0316161620mm x 20mm x 20mm AP0320202025mm x 25mm x 25mm AP0325252532mm x 32mm x 32mm AP0332323220mm x 20mm x 16mm AP0420201620mm x 16mm x 16mm AP0420161620mm x 20mm x 25mm AP0420202520mm x 16mm x 20mm AP0420162025mm x 16mm x 16mm AP0425161625mm x 16mm x 20mm AP0425162025mm x 16mm x 25mm AP0425162525mm x 20mm x 16mm AP0425201625mm x 20mm x 20mm AP0425202025mm x 20mm x 25mm AP0425202525mm x 25mm x 16mm AP0425251625mm x 25mm x 20mm AP0425252016mm x 16mm x 20mm AP0416162032mm x 32mm x 25mm AP0432322532mm x 32mm x 20mm AP0432322032mm x 25mm x 25mm AP0432252532mm x 20mm x 20mm AP0432202020mm x 20mm x 1/2"AP04202015FLugged Elbow (Male)16mm x 1/2" (73mm)AP061615S 16mm x 1/2" (88mm)AP061615L 16mm x 1/2" (100mm)AP06161510016mm x 1/2" (200mm)AP06161520016mm x 1/2" (230mm)AP06161523016mm x 1/2" (88mm)Flange and Locking Nut AP0616158820mm x 1/2"(65mm)AP06201520mm x 1/2" (200mm)AP06201520020mm x 3/4" (200mm)AP06202020025mm x 3/4" (75mm)AP06252075M 20mm x 1/2” (95m)AP06201595FittingsCompression Adaptors 16mm x 15mm Copper AP13161520mm x 20mm Copper AP13202025mm x 25mm CopperAP132525Threaded BSP Adaptors (Male)16mm x 1/2"AP09161520mm x 3/4"AP09202025mm x 1" AP09252532mm x 1 ¼"AP09323220mm x 1/2"AP09201525mm x 3/4"AP09252020mm x 1"AP09202532mm x 1"AP093225Elbows 16mm x 16mm AP05161620mm x 20mm AP05202025mm x 25mm AP05252532mm x 32mm AP05323225mm x 20mm AP05252020mm x 16mm AP05201616mm x 1/2" Male AP05161516mm x 1/2" Female AP051615F 20mm x 1/2" Male AP05201520mm x 3/4" Female AP052020F 25mm x 1" Male AP052525M 32mm x 1" MaleAP053225MB-Press Gas Adaptors16mm x 15mm Gas Copper APG28161520mm x 20mm Gas Copper APG28202025mm x 25mm Gas Copper APG28252520mm x 15mm Gas Copper APG28201525mm x 20mm Gas Copper APG28252032mm x 25mm Gas CopperAPG283225FittingsThreaded BSP Adaptors (Female)16mm x 1/2"AP10161520mm x 3/4"AP10202025mm x 1"AP10252532mm x 1 ¼"AP10323220mm x 1/2"AP10201525mm x 3/4"AP10252032mm x 1"AP10322516mm x 1/2"Wing Back Connector AP101615WB 20mm x 3/4"Wing Back ConnectorAP102020WBEnd Caps 16mm AP141620mm AP142025mm AP142532mmAP1432Fittings and AccessoriesGauges 20mm x 16mm AP17201625mmAP1725Crimp Ring Repair Tool 20mm x 25mm x 16mmAP22252016Calibrator 16mm - 32mmAP21X1632Brazing Tails 16mm Male AP0816M 20mm Male AP0820M 25mm Male AP0825M 32mm MaleAP0832M 25mm x 20mm Male AP082520M 16mm Female AP0816F 20mm Female AP0820F 25mm FemaleAP0825F 32mm Female Brazing T ail AP0832F 20mm x 15mm FemaleAP082015FTees for Brazing Copper Pipe 16mm x 16mm x 1/2"AP04161608F 20mm x 20mm x 3/4"AP04202008FThreaded Tees (Female)20mm x 20mm x Rp1/2"APF04202015F 25mm x 25mm x Rp1/2"APF04252515F 32mm x 32mm x Rp1/2"APF04323215FThreaded Elbows (Female)20mm x Rp1/2"APF072015F 25mm x Rp1/2"APF072515F 32mm x Rp1/2"APF073215FCrimping Tools16mm AP2116RN 20mm AP2120RN 25mmAP2125RNLoose Nut and Tail (Female)16mm x 1/2"AP19161520mm x 1/2"AP19162020mm x 3/4"AP19202025mm x 1"AP192525The o-ring must be white (PTFE) for gas.*******************.au .au| 2022。

管道燃气自闭阀标准
目前我了解到的关于管道燃气自闭阀的标准有以下几个：
1. GB/T 26203-2010 燃气门控装置安全要求和试验方法：该标准规定了燃气门控装置的安全要求和试验方法，包括自闭阀。

2. GB/T 21258-2007 燃气用自闭阀：该标准适用于燃气工业领域中的自闭阀，规定了其基本要求、标志、试验、包装、运输和贮存等内容。

3. ANSI Z21.21/CSA 6.5: Automatic Valves for Gas Appliances: 该标准适用于燃气家电中的自动阀门，包括自闭阀。

标准规定了阀门的设计、材料、试验、性能要求等内容。

以上只是其中一部分与管道燃气自闭阀相关的标准，国家和地区可能有不同的标准要求，具体还需根据实际情况查询和遵守当地的相关标准。

管道燃气自闭阀是一种用于燃气管道系统中的安全阀，其主要作用是在检测到异常情况时自动关闭阀门，以防止燃气泄漏或其他危险事件发生。

以下是管道燃气自闭阀的工作原理：
1.检测传感器：管道燃气自闭阀内置有检测传感器，通常是气体传感器或压力传感器。

这
些传感器可以监测管道中燃气的流量、压力和质量等参数。

2.异常检测：当传感器检测到管道中的燃气超出设定的安全范围，如超过预设压力值或检
测到有毒气体，自闭阀会判断为异常情况。

3.自动关闭：一旦自闭阀判断到有异常情况发生，它会自动触发关闭阀门的机制。

通过控
制阀门的开闭状态，自闭阀可以迅速切断燃气的供应，防止进一步泄漏。

4.报警功能：除了关闭阀门外，一些管道燃气自闭阀还配备有报警系统，可以发出声音或
光信号，提醒用户或相关人员燃气管道出现异常情况。

总的来说，管道燃气自闭阀通过检测传感器监测管道燃气的参数，一旦检测到异常情况，立即自动关闭阀门，确保燃气系统的安全运行，预防事故发生。

这样的设计可以有效保护人们的生命财产安全，是燃气管道系统中重要的安全设备之一。

球阀选型手册主要考虑以下几个方面：
1. 球阀类型：根据具体需求选择不同类型的球阀，如浮动球阀、固定球阀、V 型球阀等。

2. 球阀材质：根据流体介质选择合适的材质，如碳钢、不锈钢、合金钢等。

3. 连接方式：根据管道连接方式选择合适的球阀连接方式，如法兰连接、对夹连接、螺纹连接等。

4. 操作方式：根据实际需要选择手动操作、电动操作或气动操作等。

5. 工作温度和压力：根据流体介质的工作温度和压力选择合适的球阀，确保球阀能够承受介质的压力和温度。

6. 流量特性：根据实际需要选择合适的流量特性，如全开或全闭流量特性。

7. 密封性能：选择具有良好密封性能的球阀，以确保流体介质的密封性。

8. 安装空间：根据实际安装空间选择合适的球阀尺寸，确保球阀能够顺利安装。

9. 品牌和质量：选择知名品牌和质量有保障的球阀，以确保长期稳定运行。

10. 售后服务：选择能够提供良好售后服务的球阀厂家，以便在使用过程中得到及时的技术支持和维修服务。

总之，在选择球阀时，需要根据实际需求综合考虑以上因素，选择适合的球阀类型、材质、连接方式等，以确保球阀具有良好的性能和可靠性。

管道燃气自闭阀标准
目前，国内对于管道燃气自闭阀标准的主要参考文件为中国燃气工业技术标准CJ/T 216-2019《管道燃气自动闭锁阀技术条件》。

该标准规定了管道燃气自闭阀的基本要求、材料、设计、制造、试验、包装、贮运等方面的内容。

根据该标准，管道燃气自闭阀的主要技术指标包括：工作压力、流量系数、阀座漏率、耐完全关闭压力、耐开启压力、耐充气压力、耐腐蚀能力等。

此外，还有一些国际标准也可作为参考，如国际标准ISO
5208《工业阀门-阀门和阀门间的承用压力试验》和美国标准API 598《金属阀门验收试验》等。

需要注意的是，具体应用场景和要求可能会有所不同，因此在选型和使用时，还需要综合考虑相关的行业标准、设计要求和用户需求等因素。

气动切断阀选型手册
气动切断阀选型手册是为了帮助用户选择适合其需求的气动切断阀而编写的指南。

该手册通常包含以下内容：
1. 气动切断阀的基本知识：介绍气动切断阀的工作原理、结构特点和主要组成部分。

2. 选择准则：介绍选择气动切断阀的关键因素，例如流体介质、工作压力、工作温度、管道尺寸等。

3. 阀门类型和分类：介绍常见的气动切断阀的类型和分类，例如球阀、蝶阀、闸阀、截止阀等。

4. 阀门材质选择：根据介质的特性和使用环境，介绍选择阀门材质的考虑因素和常见材质的优缺点。

5. 阀门尺寸和接口标准：介绍阀门的尺寸设计和常用的接口标准，以便与管道系统匹配。

6. 驱动方式和配件选型：介绍气动切断阀的驱动方式和常见的配件，如气动执行器、电动执行器、手动操作装置等。

7. 安全措施和维护：提供使用气动切断阀时的安全注意事项和维护保养方法，以延长阀门的使用寿命。

8. 常见问题解答：列举常见的问题和解决方案，帮助用户遇到问题时能够及时解决。

根据用户的具体需求和使用情况，选择适合的气动切断阀对于系统的正常运行和安全性至关重要。

气动切断阀选型手册可以为用户提供必要的指导和参考，帮助其做出正确的选择。