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Page 117
液状粘固剂连接
SOLVENT CEMENT WELDED JOINTS

美国斯毕尔公司
 
  美国斯毕尔制造公司建议遵循液状粘固剂制造商的建议并阅读美国材料实验协会ASTM D 2885“对聚氯乙烯(PVC)管道和管件进行液状粘固剂连接的标准规程”。如果能够正确遵循有关规程,则采用这种方法对阀门和管道系统部件进行连接就变得很简单而且可靠。由于温度、湿度、管道口径、时间和其他条件的变化对液状粘固剂连接有很大的影响,了解每一步操作原理并根据实际情况进行必要的调整就非常重要。图省事或过分背离有关规程要求可能导致连接失败和/或阻塞阀门运动。
  Spears® Manufacturing Company recommends following solvent cement manufacturer's recommendations and reading ASTM D 2855, "Standard Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride (PVC) Pipe and Fittings". This method of joining valves and piping system components is very simple and reliable if procedures are followed correctly. Since variables of temperature, humidity, pipe size, time, and other conditions have a significant effect on solvent cement joints, it is important to understand the principles of each step and make adjustments for actual conditions. Shortcuts or excessive deviations may result in joint failures and / or frozen valve movements.
     

安全注意事项
Safety Precautions

  警告:用于管道、管件和阀门的液状粘固剂和底漆是可燃物。在工作或贮存地方必须消除熄灭任何冒烟物质,火焰,或其他引火源。要确保只在有良好通风条件的地方进行工作。避免眼睛或皮肤接触到任何粘固剂、底漆或溶剂。摄取或故意吸入溶剂蒸汽可能有害甚至致命。可能还要注意其他注意事项,请咨询液状粘固剂制造商。
  WARING: Solvent cements and primers for pipe, fittings and valves are flammable. Extinguish all smoking materials, flames, or other ignition sources in working or storage areas. Be sure to work only in a well-ventilated space. Avoid eye and unnecessary skin contact with all cements, primers or solvents. Ingestion or intentional inhalation of solvent vapors can be harmful or fatal. Additional safety precautions may apply, consult solvent cement manufacturer.

液状粘固剂的选择
Selection of Solvent Cement

  在市场上有各种各样的液状粘固剂和底漆提供。液状粘固剂的特定类型、等级和坚固性的选择应该考虑管道类型、口径、安装条件以及粘固剂与系统流体介质的化学兼容性。请咨询液状粘固剂制造商了解进一步的信息。
  A wide variety of solvent cements and primers are commercially available. Selection of specific type, grade and consistency of solvent cement should take into account pipe type, size, installation conditions and chemical compatibility of cement and system fluids. Contact solvent cement manufacturer for additional information.

必需的材料
Required Materials

锯和轴锯箱,或轮式切割机
Saw & miter box or wheel-type cutter
管道修边和倒角工具,或扁锉
Pipe deburring & beveling tool or mill file
液状粘固剂 - PVC粘固剂用于PVC材料,CPVC粘固剂用于CPVC材料;重型阀体,例如由IPS (Weld-ON)公司制造的产品
Solvent Cement - PVC cememt for PVC materials, CPVC cement for CPVC materials; heavy bodied, such as manufactured by IPS (Weld-On) Corporation
底漆 - 例如由IPS (Weld-ON)公司制造的产品
Primer - such as manufactured by IPS (Weld-On) Corporation.
刷子或涂抹类型粘固剂和底漆的涂敷工具 - 选择尺寸不小于管道半径的工具(请参阅下表)。
Brush or dauber type cement and primer applicators - select a size no less than 1/2 the pipe diameter (see chart below).
采用容器 - 可密封金属或玻璃用来盛装粘固剂和底漆
Use containers - sealable metal or glass to hold cements and primers
棉质清洁布
Cotton cleaning rags
清洗溶剂 - 例如四氢呋喃(THF)或甲乙酮(MEK)
Cleanup solvents - such as tetrahydrofuran (THF) or methylethylketone (MEK)

用于液状粘固剂和底漆的推荐涂敷工具尺寸
Recommended Applicator Size
for Solvent Cement and Primer

涂敷工具
类型和尺
寸(英寸)

Applicator
Type &
Size (in.)
管道公称通径
Nominal Pipe Size (in.)
DN15
1/2
DN20
3/4
DN25
1
DN32
11/4
DN40
11/2
DN50
2
DN65
21/2
DN80
3
DN100
4
DN125
5
刷子*
Brush*
1/2 1 11/2 2 3
涂抹工具
Dauber
3/4 11/2 不推荐
Not Recommended
滚筒
Roller
不推荐
Not Recommended
3
 

常规操作程序概述
General Procedure Outline

常规准备
General Preparation

  为了得到最好的效果,安装应该在在4.5oC和43oC温度之间进行。
  For best results, installation should be made at temperatures between 40oF and 100oF.
  在安装之前,应该对所有连接部件进行检查,看是否存在阻断、碎屑、刨削屑或其他可观察到的损坏情况。所有阀门和管道从其包装或容器中取出后,暴露在外部环境的时间最多不要超过一小时,以便所有部件之间能够冷热均衡。
  All joint components should be inspected for any breaking, chipping, gouging or other visible damage before proceeding. All pipe and fittings should be removed from their packaging or containers and exporsed to the installation environment for a minimum of one hour in order to thermally balance all components.
  对于真活接球阀、止回阀和隔膜阀,在上底漆和粘固剂连接之前,先拆卸活接头螺母和端口连接件。将螺纹对准阀门,然后把活接头螺母滑动到管道上,使得端口连接件承插能够被粘固。只有在连接完全成功粘固后,才能够重新安装阀门阀体。
  On True Union Ball, Check and Diaphragm valves, remove union nuts and end connectors before priming and cementing connections. With the threads facing the valve, slide the union nut over the pipe to which the end connector socket is to be cemented. Reinstall the valve body and union nuts only after the joint has fully cured.
  对于阀体上固定承插连接端口的阀门,要确保阀门处于开启状态,这有助于溶剂蒸汽的蒸发排放,避免溶剂蒸汽损坏内部部件。要特别小心不要让底漆或液状粘固剂进入阀体内部接触球体或其他阀门内部部件。
  On valves with fixed socket connections in the body, be sure the valve is in the open position to aid in evaporation of solvent vapors which can attack internal components. TAKE EXTRA CARE THAT NO PRIMER OR SOLVENT CEMENT IS ALLOWED TO COME IN CONTACT WITH THE BALL OR OTHER INTERNAL VALVE COMPONENTS.

步骤1:
Step 1:
顺直角垂直切割管道
Cut Pipe Square
  管道端口必须顺直角垂直切割,可采用轮式切割机或锯子与轴锯箱。建议采用精细锯齿的手锯(16~18齿/英寸)。如果切割量很大,建议采用带硬质合金刀片的电动切割锯。
  Pipe ends must be cut square, using a wheel-type cutter or saw & miter box. A fine-toothed hand saw (16-18 teeth / inch) with little or no set is recommended. A power cutoff saw with carbide blade is recommended for high volume cutting.
步骤2:
Step 2:
清理毛刺和管道倒角
Deburr & Bevel Pipe

  无论步骤1采用何种切割方式,都会产生毛刺,这些毛刺都必须在连接之前从管道内径和外径清除掉。所有管道端口都要倒角10o至15o。建议采用市场上销售的清除毛刺和倒角工具,或者也可以采用扁锉。
  Regardless of cutting method used in step 1, burrs are created which must be removed from both the pipe I.D. and O.D. before joining. All pipe ends should be beveled 10o to 15o. Commercially available deburring & beveling tool is recommended, or a mill file may be used.
步骤3:
Step 3:
清洗连接部件
Clean Joint Components

  用清洁干燥的面质布擦去管道外径和管件内径上所有松垮的污垢和湿气。不要试图连接潮湿的表面。
  Wipe away all loose dirt and moisture from the pipe O.D. and fitting I.D. with a clean, dry cotton rag. DO NOT ATTEMPT TO JOIN WET SURFACES.
步骤4:
Step 4:
检查连接配合性
Check Joint Interference Fit

  对于连接部位正确的熔接来说,对管道和管件承插端口之间的某种冲突是必要的。将管道轻轻插入管件承插端口并进行检查。不要使劲。管道和管件之间的冲突应该发生在承插深度的1/32/3之间(全连接配合)和承插底部(净配合)。不要采用不相匹配的部件。
  An interference between pipe and fitting socket is necessary for proper fusion of the joint. To check lightly insert pipe into fitting socket. DO NOT FORCE. Interference beween pipe and fitting should occur between 1/3 to 2/3 of the socket depth (full interference fit) and the socket bottom (net fit). Do not use components which improperly mate.
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