步骤5：
Step 5: |
刷底漆
Apply Primer
有必要采用底漆来渗透和软化管道和管件承插端口表面，使得液状粘固剂能够完全粘结。连接失败最常见的原因是在连接操作过程中连接表面没有完全被溶剂渗透和软化。
Primer is necessary to penetrate and soften
both pipe and fitting socket surfaces in order for the solvent cement
to properly bond. THE MOST FREQUENT CAUSE OF JOINT FAILURES
IS INADEQUATE SOLVENT PENETRATION AND SOFTENING OF BONDING SURFACES
DURING THE WELDING OPERATION.
- 采用的刷子或涂敷工具不要小于管道半径，要在管件承插部位通过来回刮擦运动涂敷足够量的底漆，直到表面软化并且处于半液状状态。这个过程随着管道口径和温度的不同可能大约需要5到15秒时间（管道直径越大温度越低需要的时间就越长）。
Using a brush or applicator size no less
than 1/2 the pipe diameter, apply a liberal
coat of primer with a scrubbing motion to the fitting socket until
the surface is softened and semi-fluid. This may take 5 to 15
seconds depending on size and temperature (larger diameters and
lower temperatures will increase required time).
- 用相同的方法将底漆涂敷在管道上，涂敷面积要比插入管件承插端口的深度要略大一些。
Apply primer to pipe in the same manner,
extending application area to slightly more than the insertion
depth into the fitting socket.
- 在管件承插部位和管道上再涂敷第二层。
Apply a second coat to both the fitting
socket and the pipe.
- 通过刮擦底漆表面检查是否已经渗透和软化。千分之几的半液状表面应该很容易刮掉。如果有必要，再重复涂敷底漆。
Check penetration and softening by scraping
the primed surfaces. A few thousandths of the semi-fluid surface
should be easily removed. Repeat primer application if necessary.
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步骤6：
Step 6: |
涂敷液状粘固剂
Apply Solvent Cement
在底漆干燥之前，液状粘固剂必须立即涂敷在底漆表面，并交互涂敷3层。采用一把尺寸不小于管道半径的刷子或涂敷工具，将足够量的液状粘固剂涂敷在上完底漆的管道表面，然后在上完底漆的管件承插部位涂敷较薄或中等厚度的液状粘固剂涂层。如果在干配合（步骤4）期间出现“净配合”，则需在管道表面再涂敷一层。在管道上确保涂敷足够量的液状粘固剂。
Solvent cement must be applied IMMEDIATELY
to primed surfaces before the primer dries in an alternating
3-coat application. Using a brush or applicator size no less than
1/2 the pipe diameter, apply a liberal coat
of solvent cement to the primed pipe surface, then apply a light to
medium coat to the primed fitting socket. If a "net fit"
was experienced during dry fit check (Step 4), apply an additional
coat again to the pipe surface. BE SURE TO USE A VERY LIBERAL AMOUNT
OF SOLVENT CEMENT ON PIPE.
阀门安装注意事项：要特别小心不要让底漆或液状粘固剂接触到球体或其他阀门内部部件。
VALVE INSTALLATION CAUTION:
TAKE EXTRA CARE THAT NO PRIMER OR SOLVENT CEMENT IS ALLOWED TO CONTACT
THE BALL OR OTHER INTERNAL VALVE COMPONENTS. |
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步骤7：
Step 7: |
连接部件
Join Components
在液状粘固剂涂敷后并在其凝固前，立即将管道插入管件承插端口并旋转四分之一转，扭转运动能够均匀地在连接内部分布粘固剂。在连接部位周围应该会形成一个完整圆周的粘固剂珠子。将连接部位保持在一起大约30秒钟，并确保管道不会移动或从承插部位后退出来。
IMMEDIATELY
following application of cement and before it starts to set,
insert the pipe into the fitting socket with a one-quarter turn,
twisting motion to evenly distribute cement within the joint. A
full bead of cement should form around the circumference of the
joint. Hold joint together for approximately 30 seconds to make
sure the pipe does not move or back out of the socket.
注意：如果没有粘固剂珠子形成，有空洞或在珠子之间有缝隙，表明液状粘固剂涂敷不够充分。如果发现这种现象，立即将连接部位拉开，并且重新涂敷足够量的粘固剂。
CAUTION:
ABSENCE OF BEAD FORMATION, VOIDS, OR GAPS IN THE BEAD ARE A SIGN
OF INSUFFICIENT CEMENT APPLICATION. IF SUCH IS OBSERVED, IMMEDIATELY
PULL THE JOINT APART AND REAPPLY AN ADEQUATE AMOUNT OF CEMENT. |
步骤8：
Step 8: |
清除过量的粘固剂
Remove Excess Cement
用一块布，将管道和管件连接部位外部所有过量的粘固剂擦干净。
Using a cloth, wipe clean all excess cement
from the exterior juncture of the pipe and fitting. |
步骤9：
Step 9: |
初始固定时间
Initial Set Time
连接部位至少在2分钟之内不能处理或移动，只有在粘固剂经过一段规定时间后连接部位才能够进行处理。建议的最短规定时间如下：
The joint must not be handled or moved for
a minimum of 2 minutes, after which the joint must be handled carefully
until the cement has gone through a set period. Recommended minimum
set time:
当温度为15至40oC时最短时间为30分钟
30 minutes minimum at 60o to 100oF
(15 to 40oC)
当温度为5至15oC时最短时间为1小时
1 hour minimum at 40o to 60oF
(5 to 15oC)
当温度为-5至5oC时最短时间为2小时
2 hours minimum at 20o to 40oF
(-5 to 5oC)
当温度为-20至-5oC时最短时间为4小时
4 hours minimum at 0o to 20oF
(-20 to -5oC) |
步骤10：
Step 10: |
连接固化时间
Joint Cure Time
在使用之前，连接部位必须充分固化（参阅下列“连接固化时间”表）。所需要的固化时间与温度、管道直径和应用压力有关。下表以美国材料实验协会ASTM
D 2855“聚氯乙烯（PVC）管道和管件液状粘固剂连接标准规程”有关标准制定。用户有责任确定连接部位是否充分固化，是否可进行处理、测试和使用，并承担相应风险。
The joint must adequately cure prior to use
(see "Joint Cure Schedule" table below). Required cure time
depends on temperature, pipe diameter, and pressure application. The
following table is based on the guidelines of ASTM D 2855, "Standard
Practice for Making Solvent-Cemented Joints with Poly Vinyl Chloride
(PVC) Pipe and Fittings". It is the user's responsibility and
risk in determining that the joint has properly cured for handling,
testing, and use. |
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