Background: Water is the source of life. Our life is absolutely inseparable from water. Healthy and safe drinking water is our most basic requirement. Starting from July 1, 2007, the National Standards Committee and the Ministry of Health jointly revised the National Standards for Drinking Water Hygiene and the 13 National Standards for Sanitary Inspection of Drinking Water. The standard is a mandatory national standard. The revision was the first since the first release in 1985. All the indicators have been increased from 35 in the original standard to 106, and 8 of the 35 indicators in the original standard were carried out. Revision. Among various indicators, indicators that may pose a hazard or potential threat to human health account for about 80%. They are about 20% of sensory traits and general physical and chemical indicators affecting water quality. The toxicological indicators of the new standard are almost five times that of the original standard. The new standard also stipulates that by the end of July 1, 2012, all 106 indicators of drinking water will reach the standard, that is to say, during the five years of the implementation of the new standard, all facilities shall be reconstructed until July 1, 2012. All indicators are implemented.
In order to protect the residents' drinking water safety, the water company has improved the service quality. People call for water pipe network products that will not cause secondary pollution to the water quality as soon as possible. This will prevent the drinking water company from reaching the standard drinking water because the pipeline network is not clean. The resulting water quality suffers secondary pollution. To meet the above requirements and the new national standards for water meters (GB/T778-2007), the National Metrology Association Water Metering Committee requested the water meter manufacturing industry to gradually eliminate the gray cast iron water meter case from June 1, 2010, and select new ones. Alternative materials that cause secondary pollution to water quality. According to relevant experts, currently the most commonly used water meter iron case cast through sand casting, although spray treatment can reduce the time of rust, but rust is inevitable, and the calcium oxide in drinking water is easy to give the liver Cause damage. The copper case is the most widely used water meter in the world, but the lead contained in the copper case also causes secondary pollution to the water quality. Although the plastic case has no harm to the human body, it cannot withstand the harsh environment of the sun, rain, high temperature, cool, cold and cold, and the quality is not very stable. The aluminum alloy case was developed and tested in recent years, but the coating is difficult to be permanently protected. The aluminum alloy contains harmful elements to the human body and can also adversely affect the body of the drinker. Due to its unique advantages of being irreplaceable, such as health, environmental protection, and long service life, stainless steel materials will become the most scientific alternative to the grey cast iron water meter case.
In order to protect the residents' drinking water safety, the water company has improved the service quality. People call for water pipe network products that will not cause secondary pollution to the water quality as soon as possible. This will prevent the drinking water company from reaching the standard drinking water because the pipeline network is not clean. The resulting water quality suffers secondary pollution. To meet the above requirements and the new national standards for water meters (GB/T778-2007), the National Metrology Association Water Metering Committee requested the water meter manufacturing industry to gradually eliminate the gray cast iron water meter case from June 1, 2010, and select new ones. Alternative materials that cause secondary pollution to water quality. According to relevant experts, currently the most commonly used water meter iron case cast through sand casting, although spray treatment can reduce the time of rust, but rust is inevitable, and the calcium oxide in drinking water is easy to give the liver Cause damage. The copper case is the most widely used water meter in the world, but the lead contained in the copper case also causes secondary pollution to the water quality. Although the plastic case has no harm to the human body, it cannot withstand the harsh environment of the sun, rain, high temperature, cool, cold and cold, and the quality is not very stable. The aluminum alloy case was developed and tested in recent years, but the coating is difficult to be permanently protected. The aluminum alloy contains harmful elements to the human body and can also adversely affect the body of the drinker. Due to its unique advantages of being irreplaceable, such as health, environmental protection, and long service life, stainless steel materials will become the most scientific alternative to the grey cast iron water meter case.
Casting iron pump parts basic type
Casting Iron Pump Parts Basic Type,Cast Iron Pump Parts,Cast Iron Hand Pump Parts,Cast Iron Pitcher Pump Parts
Bin-Bridge General Machinery Co.,Ltd , https://www.castingpump.com