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  • 鉴别优/劣质PE管的六种方法
  • 本站编辑:杭州康美塑化有限公司发布日期:2017-12-07 09:33 浏览次数:
      PE管即聚乙烯管,其适用领域相当广泛。由于它强度高、耐高温、抗腐蚀、无毒,且克服了镀锌管、铸铁管易锈蚀、结垢、滋生细菌、寿命短的缺点,被广泛应用于给水管制造领域。
PE is a polyethylene pipe, its application field is extensive. Because of its high strength, high temperature resistance, corrosion resistance and non-toxic, it overcomes the shortcomings of galvanized pipe and cast iron pipe, which is easy to rust, scale, breed bacteria and short life, and is widely used in the field of water pipe manufacturing.
       随着人们对PE管的需求量越来越大,现在市场上也出现了各种各样的PE管。不可否认的是,市场上鱼龙混杂,有很多PE管都是达不到质量标准的。这样不仅仅影响消费者的使用,更会影响到工程质量,给以后人们的生产、生活埋下隐患。因此,学会鉴别PE管质量的好坏是非常重要的。
With the increasing demand for PE pipe is bigger, the market now has a variety of PE pipe. It is undeniable that the market has a lot of PE are dragons and fishes jumbled together, not up to the quality standard. This will not only affect the use of consumers, but also affect the quality of the project, and bring hidden dangers to the production and life of the people in the future. Therefore, learn to identify the quality of PE is very important.
一、看外观
One, look at the appearance
优质PE管:
The quality of PE pipe:
 
管材内外表面平整滑无气泡、凹陷、杂质等缺陷。
The inner and outer surfaces of the pipe are smooth and smooth without bubbles, sags and impurities.
 
劣质PE管:
Inferior pe:
 
管材内外表面不平滑、不光亮、有麻点、内外表面有明显凹陷。
Inside and outside the pipe surface is not smooth, bright and on the inside and outside surface has obvious depression.
 
二、铣削条带
Two. Milling strip
 
优质PE管:
The quality of PE pipe:
 
油亮、平整,反复折叠不易断裂。
Shiny and smooth, folding is not easy to break.
 
劣质PE管:
Inferior pe:
 
颜色发暗,折叠容易断裂。
The color is dark, and the folding is easy to break.
三、焊接口
Three.
 
合格的焊接口应具有沿管材整个圆周平滑对称的翻边,且翻边比较低深度不应低于管材表面;焊缝两侧紧邻翻边的外圆周的任何一处错边量不应超过管材壁厚的10%。
The qualified welding port shall have smooth and symmetrical flanging along the entire circumference of the pipe, and the minimum depth of the flanging shall not be lower than that of the pipe surface. The amount of misalignment should not exceed 10% of the wall thickness of the pipe.
优质PE管:
The quality of PE pipe:
 
翻边光滑平整。经接缝压力后,翻边可较长。
The flanges are smooth and smooth. The flanging can be long after the joint pressure.
 
劣质PE管:
Inferior pe:
 
翻边后表面产生大量气孔。经接缝压力后翻边短。
A large number of holes are produced on the surface after the flanging. The flanging is short after the joint pressure.
四、嗅觉
Four. Smell
 
优质PE管:
The quality of PE pipe:
 
刚加工完或加热融化后的产品有轻微的塑料香味,冷却后的产品无异味。
The products after being processed or heated and melted have a slight plastic fragrance, and the products after cooling have no odor.
 
劣质PE管:
Inferior pe:
 
有刺鼻气味。
There is a pungent smell.
五、断裂伸长率
Five. Elongation at break
 
断裂伸长率是指试样在拉断时的长度值与原长的比值,断裂伸长率越高,说明产品柔韧型越好,性能越好。
The elongation at break refers to the ratio of the length value to the original length when the specimen is broken, the higher the elongation at break, the better the flexibility of the product, the better the performance.
 
优质PE管:
The quality of PE pipe:
 
拉长至3.5倍不断裂。
Lengthening to 3.5 times no fracture.
 
劣质PE管:
Inferior pe:
 
拉长容易断裂,韧性差。
The lengthening is easy to break, and the toughness is poor.
 
六、氧化诱导时间
Six, oxidation induction time
 
氧化诱导时间是测定试样在高温氧气条件下开始发生自动催化氧化反应的时间,是评价材料在成型加工、储存、焊接和使用中耐热降解能力的指标。氧化诱导时间越长,说明产品耐老化越好,性能越好。
The induction time of oxidation is the time to start the automatic catalytic oxidation reaction of samples under high temperature oxygen condition, and it is an index to evaluate the thermal degradation ability of materials in processing, storage, welding and application. The longer the oxidation induction time is, the better the product is aging and the better the performance.

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