Formaldehyde is one of the most common indoor pollutants, primarily coming from artificial wood products like particleboard and plywood. It can irritate the respiratory system, leading to conditions such as pharyngitis and asthma. The World Health Organization classifies it as a potential carcinogen. In China, the maximum allowable concentration of formaldehyde in living spaces is 0.08 mg/m³.
Benzene, along with toluene and xylene, is commonly found in paints, adhesives, and wall coatings. Exposure to benzene can harm the body's blood-forming organs, potentially causing leukemia and other blood-related diseases. It has been classified as a known human carcinogen by the WHO. According to China’s Indoor Air Quality Hygienic Code (2001), the acceptable level of benzene in indoor air should be below 0.087 mg/m³.
Ammonia is mainly released from concrete accelerators used during construction. This gas can irritate the respiratory tract, eyes, and skin, causing symptoms like coughing, tearing, headaches, and dizziness. The 2001 Code for Indoor Environmental Pollution Control of Civil Buildings sets the ammonia limit at less than 0.2 mg/m³ indoors.
Radon is a naturally occurring radioactive gas found in building materials such as cement, slag bricks, and natural stone. It is a known cause of lung cancer and ranks second only to smoking as a leading cause of the disease. In China, the national standard for radon levels is less than 100 Bq/m³ in new homes and less than 200 Bq/m³ in older buildings.
In addition to radon, other radioactive materials from natural stones, such as radium and potassium, can also contribute to radiation exposure. These materials emit harmful radiation through their decay process. According to the "Limits of Hazardous Materials for Interior Decoration Materials," natural stone products are categorized into three classes based on their radioactivity levels—A, B, and C. For residential use, it is recommended to choose Class A stone to ensure safety.
Misunderstandings about home decoration can lead to unnecessary health risks. One common mistake is overusing certain materials, especially flooring and paint, which may result in excessive accumulation of harmful substances. It's important to consider the room’s ventilation capacity and avoid using too many decorative items that might increase pollution levels.
When selecting materials, it's wise to avoid excessive use of colored paints just for aesthetic purposes, as this can lead to indoor lead contamination. Also, when installing composite flooring, avoid laying large core boards underneath unless necessary. Proper sealing of cabinets and heating covers made from core board is essential to minimize formaldehyde emissions. Using high-quality, thick paint with good sealing properties is also recommended.
Finally, after renovation, it’s crucial not to move in immediately. Allow sufficient time for the release of harmful gases, typically around a month. If possible, have the indoor air tested by a professional environmental testing agency. Follow expert advice and implement effective strategies to manage indoor air quality before moving in. This ensures a safer and healthier living environment.
The new Stainless Steel Wire Rope should not be used immediately under high speed and heavy load conditions, but should be run under low speed and medium load conditions for a period of time, so that the new wire rope can adapt to the use state first, and then the speed of the wire rope can be gradually increased to lift the load. That is, wire ropes must go through an initial break-in stage before high-speed, heavy-duty work.
When using stainless steel wire ropes and pulleys, care must be taken to prevent the wire ropes from jumping out of the pulley grooves. If the wire rope is still used after it is removed from the wheel groove, the wire rope will be deformed, kinked, broken wires, and broken strands. This will seriously shorten the service life of the wire rope. If the rope breaks, it usually has very serious consequences.
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