In China's machine tool industry, there are such a group of people who have long been engaged in the management and technical work of the machine tool industry, and have a long-term commitment and contribution to the cause. They may have entered the age of sorrow, but they are still busy. It is precisely because of such a group of adherents and forwarders that the Chinese machine tool industry has been flourishing and exciting. Liang Xuanzhen, honorary chairman of the China Machine Tool Industry Association, is one of them.
ASME B16.5 Pipe Flanges and Flanged Fittings: NPS 1/2 through NPS 24 Metric/Inch Standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings. Included are:
B16.5 is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, or plate materials. Also included in this Standard are requirements and recommendations regarding flange bolting, flange gaskets, and flange joints.
Careful application of these B16 Standards will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.
Intended for manufacturers, owners, employers, users and others concerned with the specification, buying, maintenance, training and safe use of valves with pressure equipment, plus all potential governing entities.
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Liang Xunyi, who graduated from the Department of Mechanical Engineering of Wuhan University in 1952, was the chief engineer and director of the Machine Tool Bureau of the Ministry of Machinery Industry. Because of the 80-year-old, he claimed to be "post-80s." It can be said that he has been dealing with machine tools throughout his life, and has personally participated in and experienced the process of birth, growth and growth of the machine tool industry in New China, especially in various stages of technical exchanges with foreign companies.
Listening to Liang’s story about the development of Chinese machine tools has always given reporters an illusion: it seems to be more than just a person, but a piece of history, a special, tortuous, or will have an impact on the present and the future. history!
Perhaps it is precisely because of those who have such resumes and experience that they can qualify for a comment on the current and former machine tool industry, and only such comments are worthy of people's taste.
A few days ago, on the occasion of the opening of the 11th China International Machine Tool Exhibition, the reporter saw the analysis and research articles of the industry experts on the current situation of machine tools. Liang Lao believes that for the future development of the machine tool industry, it must be combined with the overall situation of China's machine tool industry to analyze. To this end, he collects and organizes materials in various aspects and shares with the industry. (This article will be published in the special issue of the machine tool exhibition sponsored by China Industry News on April 9). He said that this article is impossible to give an answer to the question of how to correctly develop the machine tool industry in China. However, the readers can use the current total supply capacity, product range and performance level, technology and R&D of China's machine tool industry. The analysis of various aspects such as the development of strength, the application of information technology and the reform of the mechanism, the operation of the enterprise level, the technological transformation and the international integration, and the judgment of the specific situation of the enterprise itself.
Liang Xunzhen believes that in recent years, China's machine tool industry has undergone extensive and profound changes, the industry has developed rapidly, technological progress has been remarkable, and industry restructuring has achieved remarkable results. At present, the machine tool industry has ushered in unprecedented opportunities and faces severe challenges.
He said that since 2000, China's national economy has developed rapidly, and the demand for machine tool products has been expanding. The average annual growth rate of domestic machine tool consumer goods is over 20%. In line with the changes in the demand of China's machine tool market, the industrial scale of the machine tool industry has continued to expand. In 2008, the industry's total industrial output value reached 347.23 billion yuan, a year-on-year increase of 27.5%. It has become the world's first consumer and first importer of machine tools for seven consecutive years. In the context of the financial crisis, the economies of various countries have generally been sluggish. Therefore, the development of China's machine tool market and China's machine tool industry has become the focus of the world machine tool industry.
Liang Xunzhen said that the current global economic crisis will inevitably have an impact on China's machine tool industry. Domestic machine tool manufacturers should actively take measures to adjust the structure, abandon the nostalgia for low-end products, and work hard to improve technical performance and improve product performance. Quality and personalization, expanding the field of service to users, meeting the new requirements of users. In particular, aiming at the high-end market demand that China's military and civilian equipment manufacturing industry is still developing, replacing imports, capturing the market share that should be possessed but not yet taken, and striving to develop targeted exports, which is the current and long-term of China's machine tool industry. One of the effective ways to go is also the responsibility.
(1) flanges with rating class designations 150, 300, 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and flanges with rating class designation 2500 in sizes NPS 1/2 through NPS 12, with requirements given in both metric and U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units;
(2) flanged fittings with rating class designation 150 and 300 in sizes NPS 1/2 through NPS 24, with requirements given in both metric and U.S. Customary units with diameter of bolts and flange bolt holes expressed in inch units;
(3) flanged fittings with rating class designation 400, 600, 900, and 1500 in sizes NPS 1/2 through NPS 24 and flanged fittings with rating class designation 2500 in sizes NPS 1/2 through NPS 12 that are acknowledged in Non-Mandatory Appendix E in which only U.S. Customary units are provided.
This Standard is to be used in conjunction with equipment described in other volumes of the ASME B16 Series of Standards as well as with other ASME standards, such as the Boiler and Pressure Vessel Code and the B31 Piping Codes.
Liang Xunwei: China is still the focus of the world machine tool industry
Abstract In China's machine tool industry, there are such a group of people who have long been engaged in the management and technical work of the machine tool industry, and have a lifelong persistent pursuit and contribution to the cause. They may have entered the age of sorrow, but they are still busy. It is precisely because of such a group of adherents and forwarders, China...