1. When checking PVC lay flat hose, if there is one item that does not conform to the rules of this standard, we promise to re-examine it once. Samples are doubled in the most economical way at the time of reinspection. The results of the sample re-examination shall conform to the rules of this standard, otherwise it will be unqualified. 2. The same variety, same inner diameter and 1000 meters long PVClay flat hose were used as a batch during inspection. Take 100 meters from it for appearance inspection. 3. The inner diameter of each sample should conform to the rules of this standard; the arithmetic average value of unit length, weight and seepage of three samples should conform to the rules of this standard; in fact, if you want to purchase PVC lay flat hose of good quality, you need to go to the standard PVC lay flat hose manufacturer to purchase, so as to ensure the quality and service life of PVC lay flat hose. In agricultural production, we can not do without PVC lay flat hose, but in the market, the quality of PVC lay flat hose is mostly very poor, so we need to check.