The harm of lead in faucet
In 1972, the expert committee of the world food and agriculture structure and the world health structure determined that the total tolerance of each person to lead per week was 3 milligrams. Children, infants, fetuses and pregnant women were more sensitive to lead. Lead can harm the nervous system, hematopoietic system and reproductive system of human beings, which is more harmful to children. It will affect their growth and development and intelligence growth, and even cause dementia in severe cases.
There are two important sources of lead in drinking water. One is the arbitrary discharge of industrial pollutants and waste water, resulting in water pollution; the other is the secondary pollution caused by traditional water delivery products manufacturing process such as faucets.
Lead in faucet ≠ harm to human body
Lead in faucet does not cause harm to human body. Only when the lead content exceeds the positive standard, can it crush the health of human body. People take a certain amount of lead every day, about 82 micrograms per day. As usual, a bottle of mineral water lead content, as long as less than 10 micrograms of qualified products.
Both copper faucets and stainless steel faucets on the market today contain lead. The physical properties of copper faucets cannot be guaranteed without adding lead. Stainless steel faucets are alloy products, although the lead content is low, it is not completely lead-free. The lead-free faucets purchased by consumers in the market refer to the faucets whose lead content is within the definite life value range, but not completely lead-free. Nowadays, the important material of kitchen faucet used by many families is brass hpb59. As pure copper is not easy to cut as pure aluminum, skilled staff of bathroom enterprises will join a small amount of lead in brass to improve the machinability and wear resistance of brass.
Therefore, there is no lead-free product in the market. As long as the product has passed the inspection and certification, and the lead content meets the standard requirements, consumers can purchase and use it at ease.
Heavy metal and chemical pollution of drinking water will also be caused. Heavy metal lead pollution mainly comes from the heat stabilizer lead salt in PVC molding; biological pollution is mainly due to the oxygen permeation and light transmission of the pipe, which makes the water medium in the pipe propagate bacteria; the chemical pollution mainly comes from the osmotic discharge of the battle materials in the pipeline. Therefore, it is not scientific for consumers to limit their attention to faucets, and they should pay more attention to the quality of the whole set of water delivery products.
Faucet in the use of the same, usually with kitchenware, sink matching, relatively speaking is not an independent product. In a complete set of water delivery products, in addition to faucets, transport pipes, cast iron pipes, copper pipes and PVC pipes also contain certain lead content. According to our observation, the market share of copper faucets in the home market is about 95% or more. Copper alloy is the most important material to be used. Copper and zinc are the most important elements. Other elements include iron, aluminum, lead, tin and manganese.
According to JC / T 1043-2007 "water faucet lead release limit" building materials industry standard, the statistical value limit of faucet lead detection is strictly defined as 11 μ G.
The article comes from Kaiping stainless steel faucet manufacturer http://www.llg365.com