As the name suggests, a permeable filter pipe refers to a drainage filter with a filter hole. Water can penetrate through it from above, and the filter pipe has many functions in our daily life. One of the most common ones is used in well pipe operations. It not only filters sediment well, but also supports the well wall. It can also discharge waste gas from the soil well, improving the quality of water. Currently, there are many types of filter pipes on the market, and their prices vary. Do you know how to choose?

The main factors of counterfeit and unqualified steel pipes in the market are: the actual size is about one specification smaller than the nominal size, and dealers purchase goods based on the actual weight, and deliver at the theoretical weight to earn a large amount of metal and make huge profits; Low intensity; The unqualified rate of chemical composition is high. The main reason is that the raw materials purchased by the small filter pipe factory are not up to standard, and the chemical composition is not up to standard due to poor quality.

When purchasing a filter pipe, first of all, from the appearance size, you can use a vernier card measuring tool to simply measure whether the actual size is about one specification or more smaller than the indicated size (for example, the standard inner diameter of the filter pipe is 2188mm ± 0.4mm, while the inner diameter of counterfeit filter pipes is mostly about 218mm).

At the same time, some fake and inferior filter pipes deceive people's vision by smashing the mouth, so when viewed from the surface end face of the steel pipe, it appears as a flat oval shape, while the end face of the regular material should be basically circular;

Secondly, from the perspective of surface quality, fake and inferior filter pipes have poor surface quality due to the use of unqualified raw materials for rolling, often with defects such as scabs, and have an overall roughness. At the same time, some small steel mills have a reddish surface color due to insufficient heating temperature and rolling speed;

Thirdly, most formal filter pipes are packaged in large bundles when they leave the factory, and the bundled steel is hung with metal labels corresponding to the actual product, indicating the manufacturer, steel grade, batch number, specifications, and inspection code. However, due to the simple production conditions and lack of large-scale lifting equipment, most of the fake and inferior steel bars are packaged in small bundles or loose, without metal labels or quality assurance certificates.

Of course, to completely avoid buying fake and inferior filter pipes, it is better to purchase them from the direct agents of well-known manufacturers, especially the spiral pipes of famous brands in the province. Not only are the quality stable, but they are also easy to handle even if disputes arise. Experienced individuals can also distinguish other chemical components through sparks.

The editor suggests that when choosing filter pipes, everyone must consider multiple aspects and choose reliable manufacturers with after-sales support. We hope that the content shared by the editor above will be helpful to you. Thank you for your attention!