Chinese have a saying: No rules no standards. Showtime any industry, we need a rule and principles, we call standard system. That is how our system of stainless steel standard form: With the development of China's stainless steel production technology development and technical standards of stainless steel began to set up and developed in the 1950s. Then due to the need of chemical and defense industries growing, coupled with advances in steel-making technology, a large number of new steel grades have been developed and successful imitation, and they are being put into production and use. In order to better adapt to the production and practical requirements, consolidating development and production of stainless steel technological advances. In 1982, according to the Ministry of Metallurgical Industry arrangements, Standardization Institute organization of factories and Iron and Steel Institute conduct research on stainless steel standard "double-mining (Cash international standards and foreign standards)" issue, comments. Through the United States, Japan, Germany, the former Soviet Union and other countries and relevant ISO standard analytical proof to Japan JIS standard system of stainless steel, combined with China's actual production and use, in accordance with existing standards and levels, conduct additional modifications, the establishment of a new stainless steel standard system, allows standard levels of stainless steel has greatly improved, reached the world advanced level. After 1985, under the excellent situation in-depth development of China's economic reform, China's stainless steel production technology continues to progress. In order to meet the needs of the production, use, import and export trade, but also on standard system has been adjusted and supplemented, and formulated a stainless steel clad plate, rope, mechanical structure welded pipe and seamless pipe, welded pipe and fluid transport seamless pipe , boilers and heat exchangers as well as color picture tubes seamless pipe cold-rolled strip with multiple standards, etc., and some of the original standards have been revised. At present, China has 33 standard stainless steel products, as well as stainless steel, special physical and chemical test methods to national standards 13, a variety, reasonable structure, more advanced standard stainless steel screen system is basically formed. 

keywords: Stainless steel, stainless steel welded pipe, stainless steel pipe manufacturer,