(1) PVC pipe means that the main raw material for making pipe is PVC resin powder. The types of PVC pipes are generally divided by the use of pipes: drain pipes, water pipes, wire pipes, cable sheath pipes...
Because the raw material formulas are different, the pressure resistance of various types of tubes is different.
The PVC water supply pipe is matched with the water supply fittings for the water supply project of the building.
PVC drain pipe is used for sewage discharge...
Fourth, the method of distinguishing the quality of PVC pipe
(1) Look at the surface finish and whiteness first.
(2) Take the sample to fall, the person who is easy to break is generally a high-calcium product. Of course, it is ok to meet your requirements.
(3) Take the sample with the foot on the side of the pipe to see if it can crack, or the elongation at break after cracking.
(4) The weather resistance is very troublesome. The most direct way is to take a few days to get the high temperature and high light, to see the surface change rate, but it is a waste of time. Mainly look at the first three items just fine.
NPK Water Soluble Fertilizer is a pure nutrient and full water soluble fertilizer which is suitable for various plants.It can supply N,P,K for crops in different period to increase yields. It`s hormone free, chlorine free, contains EDTA micro elements with high & long efficiency.
Water-soluble fertilizers are compound fertilizers containing nitrogen, phosphorus, potassium, calcium, magnesium, and trace elements that are completely soluble in water. From the nutrient content, there are a large number of elements water-soluble fertilizers, water-soluble fertilizers in the middle element, water-soluble fertilizers in trace elements, water-soluble fertilizers in amino acids, water-soluble fertilizers in humic acid, and organic water-soluble fertilizers.
NPK Water Soluble Fertilizer
NPK Water Soluble Fertilizer,Water Soluble NPK Fertilizer,Organic NPK Water Soluble Fertilizer,NPK 100% Water Soluble Fertilizers
SHIJIAZHUANG HAN HAO TRADE CO., LTD. , http://www.hhfertilizers.com