In terms of raw materials: PE-RT raw material is a special material that is specially grafted to polyethylene raw materials to change its heat resistance material. But its processing fluidity is better, and it is similar to ordinary polyethylene, and it is easier to process. In the pipeline manufacturing company, PE-RT processing can be carried out using ordinary PE or PPR production lines in the medium. From the processing difficulty, it is convenient to use the fake or adulterated original
material.
At present, the following methods of fraud are common in the market:
(1) directly use ordinary polyethylene as PE-RT for processing;
(2) incorporate part of LDPE or LLDPE into PE-RT to reduce costs;
(3) add super. Exceed the 10% addition rate stipulated by the national standard to add a large amount of recycled materials;
(4) some manufacturers add raw materials such as LLDPE and add colored masterbatches to cover the eyes and ears.
In terms of pipes: At present, the following points of pipes used in the market require special attention when selecting:-The selection of pipes should be noted
Regarding the thickness of their products, some manufacturers use the method of reducing the wall thickness (slightly below the specified value of the national standard wall thickness) to reduce the cost
And to sell at a lower price, this approach is extremely irresponsible. At present, the safety factor of the pipes used in many projects is selected
It is not high. If the wall thickness of the pipe is not up to the standard, a slight improper use will cause the pipe to leak, and the consequences will be extremely serious.
The second is that some products flow into the construction site without a qualified full-item inspection report. Because some adulterated PE-RT pipes can pass the general inspection, but basically only long-term thermal stability tests can be detected, so it is not easy to identify all of the PE RT pipes. Because of the high cost of long-term thermal stability experiments, ordinary small manufacturers will not spend too much money to do it, and most large manufacturers will stick to the bottom line of quality responsibility.