Sliding Doors Profile Extrusion Dies
Aluminum alloy sliding doors and windows
Aluminum alloy sliding doors and windows are a common type of doors and windows, which are made of aluminum alloy materials. Aluminum alloy sliding doors and windows have the following characteristics:
1. Durability: Aluminum alloy materials have excellent corrosion resistance and wear resistance, and can maintain good appearance and functionality for a long time.
2. Aesthetics: Aluminum alloy sliding doors and windows have a simple and elegant appearance with smooth lines, which can match various architectural styles.
3. Sound insulation: Aluminum alloy sliding doors and windows adopt a multi-layer sealing strip design, which has good sound insulation effect and can effectively block the spread of noise.
4. Thermal insulation: Aluminum alloy sliding doors and windows are made of broken bridge aluminum profiles and filled with thermal insulation materials. They have good thermal insulation properties and can effectively isolate the temperature difference between indoor and outdoor.
5. Security: Aluminum alloy sliding doors and windows are equipped with a multi-point locking system, which provides high security performance and can effectively prevent intrusion.
6. Environmental protection: Aluminum alloy materials are recyclable and meet environmental protection requirements.
In general, aluminum alloy sliding doors and windows have the characteristics of durability, beauty, sound insulation, heat preservation, safety and environmental protection, and are widely used in residential, commercial buildings and other places.
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The GB29518-2013 “Nitrogen Oxide Reducing Agent Urea Aqueous Solution for Diesel Engines (AUS32)â€, known as the National Standard for Automotive Urea, was issued by the AQSIQ and the National Standards Commission on May 7, 2013, and July 2013. Day implementation. This standard is proposed by the Ministry of Environmental Protection, and is under the jurisdiction of the National Petroleum Products and Lubricants Standardization Technical Committee Petroleum Fuels and Lubricants Subcommittee. The drafting unit includes Sinopec Sales Co., Ltd. North China Branch, China Academy of Environmental Sciences, Sinopec Lubricant Branch, PetroChina Sales Company, PetroChina Lanzhou Lubricant Research and Development Center, Sichuan Meifeng Chemicals and other units.
This standard specifies the terminology and definition, identification, technical requirements and test methods, inspection rules, markings, packaging, transportation and storage of the urea aqueous solution (AUS32) for reducing nitrogen oxides in diesel engines, and the filling interface for this product. Made a recommendation.
This standard stipulates that the aqueous urea solution (AUS32) refers to urea that is industrially produced only containing trace amounts of biuret, ammonia, and water, does not contain aldehydes and other substances (such as anti-caking agent), does not contain sulfur and sulfide, Chlorides, nitrates and other compounds. AUS32 filling pumps and containers conforming to this standard shall have the following designation: AUS32GB29518.
This standard also states that to avoid contamination of the AUS32 and corrosion of vessels, pipes, valves, fittings, gaskets, etc., the AUS32 must be compatible with materials that are in direct contact during processing, transportation, storage, and sampling.
It is reported that before, some cities implemented (or advanced) the National IV standard for heavy-duty diesel vehicles, and issued local standards for different versions of urea for vehicles, such as Beijing and Shanghai; in April 2013, the China Automobile Engineering Society also released The "Technical Specifications for Urea Solutions for Vehicles" compiled by the association was organized. Now that the national standard version GB29518-2013 has been released and implemented, it will become a unified national standard.
The Ministry of Environmental Protection originally issued a document stipulating that the sales of national heavy and light diesel vehicles shall be implemented by the national IV standard on July 1, 2013, but the time for the release of the national standard “vehicle urea standard†will obviously lag behind; more importantly, the national IV diesel Failure to fully supply the country, so it is inevitable that the nationwide diesel vehicle sales will be delayed again.
Car urea "national standard" implemented on July 1