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 sore throat, asthma, and even more severe health issues. 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. These volatile organic compounds (VOCs) can damage the body’s blood-forming system, leading to blood disorders and even cancer. The WHO has confirmed benzene as a known carcinogen. According to China's "Indoor Air Quality Hygienic Code" from 2001, the safe level of benzene indoors should be below 0.087 mg/m³.
Ammonia is mainly released from concrete mixtures used in construction, especially during winter when antifreeze agents are added. It can cause irritation to the eyes, skin, and respiratory tract, resulting in symptoms like coughing, dizziness, and tearing. 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, bricks, and soil. It is a known cause of lung cancer, ranking second only to smoking as a cause of this deadly disease. In China, the national standard for radon levels in new homes is less than 100 Bq/m³, while older homes should not exceed 200 Bq/m³.
In addition to radon, other radioactive substances from natural stone and building materials can also pose health risks. These include radium and potassium, which release radiation through decay. 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 home interiors, it's recommended to choose Class A stone to minimize exposure.
Misunderstandings about room decoration can lead to unnecessary health risks. It's important to design your space wisely. Even if materials are certified as safe, avoid using large amounts of the same type of material, especially flooring, which can trap harmful substances. Also, avoid overusing colored paints, as they may contain lead, which is toxic when inhaled or ingested.
When choosing construction methods, consider the long-term impact. Avoid laying excessive core boards under flooring unless necessary. Select proper sealing materials for walls and ensure that any large panels used in cabinets or heating covers are properly sealed with formaldehyde-resistant sealants. When painting, opt for thicker, high-quality paint that offers better coverage and sealing properties.
Finally, after renovation, don’t rush to move in. Allow time for ventilation—ideally at least a month—to let harmful gases dissipate. If possible, have your indoor air tested by a professional to assess safety. Follow expert recommendations and take necessary steps before moving in to ensure a healthy living environment.
Wire rope assembly
On tied arch bridges, vertical or crossed hanger assemblies are excellent at transferring loads from the bridge to the arch. Sealed rope or helical strand assemblies come with a wide range of end treatment options to choose from to suit your design needs. In addition, when it comes to corrosion protection, Bridon-Bekaert offers a variety of solutions to meet your service life and maintenance requirements. The specific setup of short cable lengths is inherent to the tie-rod concept and we look forward to working with you to help you realize your plan.
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Jiangsu Hongze Stainless Steel Wire Rope Co., Ltd , https://www.hzrope.com