Blind Flanges are manufactured without a bore and used to blank off the ends of piping, Valves and pressure vessel openings.
From the standpoint of internal pressure and bolt loading, blind flanges, particularly in the larger sizes, are the most highly stressed flange types.
However, most of these stresses are bending types near the center, and since there is no standard inside diameter, these flanges are suitable for higher pressure temperature applications.
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The plan was formulated by the Plastics Recycling Special Committee of the China Plastics Processing Industry Association. It will establish standards for renewable plastics on potentially toxic substances such as metals, plasticizers, some flame retardants and vinyl chloride monomers, and hire a third-party auditor. Agency to verify compliance.
Industry officials believe that this approach is conducive to long-term improvement of China's recycling industry's low profitability, helping domestic recycled material manufacturers to increase their self-confidence in the competition of international big companies, and at the same time promoting the benefits of recycled plastics to reduce carbon emissions.
Tan Yiwu, a member of the PLA Plastics Recycling Special Committee, explained the original intention of setting up the certification scheme: “Our industry mainly maintains competitiveness through low cost, but does not promote the environmental friendliness of recycled plastics.†He is also a remanufacturer in Guangzhou. He is the deputy general manager of Guangdong Junfu Industrial Co., Ltd., a chemical fiber producer.
The association announced the plan at the 5th China Plastics Recycling and Recycling Conference/Representation (Replas) held in Ningbo, Zhejiang on November 4th - 5th.
Chairman of the Plastics Association Committee for Recycling and Utilization of Plastics and President of Renewables Great Technology Development (Shenzhen) Co., Ltd. Lin Dongliang said that he hopes to complete the development of the standard by March and April of next year and is now requesting the Intertek Corporation Participate in the design of the program and certification.
According to Lu Wei, head of authentication of the Shanghai-based Tianxiang Quality Technical Service Co., Ltd., which is headquartered in London, the related details are still open to question, but the standard will basically be divided into three levels of certification, and the requirements will be gradually increased. Responsibility is fulfilled and the carbon footprint will be calculated from a higher level.
She said that higher requirements for materials quality and standards include multinational corporations such as Adidas who wish to use recycled fiber, and companies such as Wal-Mart that have already launched a supplier environmental rating system.
Other speakers at the conference also spoke about China’s urgent need to improve the theme of the regeneration system.
Sun Ziqiang, a member of the Plastics Association’s Committee on Plastics Recycling and the General Manager of the Recycling Specialist Shanghai Yaqing Trading Co., Ltd., said that the public impression of the Chinese recycling industry is not good. The public sees it as a member of the recycling industry, not Industries that contribute to the conservation of natural resources.
Sun Ziqiang said that it is necessary for China's recycling industry to unite with the government to follow the example of Europe, the United States, and Japan and establish a more complete recycling system for recycled materials. If such a recycling system is not established, the Chinese recycling industry will never be able to recover the environmental pollution caused by the recycling of the media and the public.
At present, many domestic regeneration activities are not carried out through government systems as in many developed countries. Instead, they are carried out by roadside and home purchase of waste materials. Sun Ziqiang said that this inefficiency is not conducive to effective recycling.
Due to the insufficient amount of domestic renewables, China imports about 7 million tons of waste plastic each year, while other countries can collect about 9 million tons of waste each year through its own recycling system.
Sun Ziqiang said: "We imported waste plastics because foreign [recycling] systems are more efficient."
Sun Ziqiang said that although it is difficult to count specific Chinese recycling figures, according to data released by the Chinese customs at the meeting, the amount of waste plastics imported by China will increase by about 6% in 2010, which is about 7.4 million tons.
Although most of the industry leaders that call for the reform of China's recycling system come from large-scale enterprises, there are many other small companies in the highly dispersed recycling industry in China. Larger companies in the industry believe that the government is against these small companies that often ignore environmental regulations. lack of regulation.
Tan Yiwu said at the meeting that the establishment of a new eco-certification standard, although unable to establish an entry-level benchmark for the operation of the recycling industry, can strengthen the status of companies that comply with environmental regulations in the market. This point of view was approved by other committee members of the Plastic Recycling Special Committee.
Tan Yiwu said: "Of course, we very much hope that we can certify irresponsible managers out of this industry."
He also stated that the Chinese recycling industry lacks sufficient data to allow government officials to fully understand the benefits of plastic recycling, such as how much carbon emissions and energy consumption can be reduced by replacing plastic raw materials with plastics.
An analysis by a professor from Shanghai University at the conference revealed that it is estimated that the amount of carbon saved by China's plastic recycling industry is equivalent to that of 27 coal-fired power plants.
Tan Yiwu said that the plastic recycling industries in the United States, Europe, and Japan have all set up a comprehensive system to count reliable data on the amount of recycled materials and final dosages, showing the potential benefits of recycled plastics.
Tan Yiwu said: "And we lack such data and cannot communicate effectively with the government."
A domestic plastic recycling trade association intends to launch a voluntary eco-certification program for the recycled plastics industry. It hopes to use this industry to open a more lucrative consumer market, and at the same time it will try to reverse the negative impression caused by plastic recycling to the domestic public.