Standard name and number, national standard code

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Legal analysis: National standards shall formulate national standards for technical requirements that need to be unified nationwide. National standards are planned, approved, numbered and issued by the Standardization Administration of the People's Republic of China.

The national standards are codenamed GB and GB T, which mean mandatory national standards and recommended national standards respectively. For technical requirements that do not have national standards and need to be unified within a certain industry in the country, industry standards can be formulated as a supplement to national standards, and when the corresponding national standards are implemented, the industry standards should be abolished by themselves.

Legal basis: Article 4 of the Measures for the Administration of National Standards Article 4 The code of the national standard is composed of uppercase Chinese pinyin letters.

The code of the mandatory national standard is "GB", and the code of the recommended national standard is "GB T".

The number of the national standard consists of the code of the national standard, the sequence number of the national standard and the year number of the national standard (that is, the last two digits of the year of release). Example:

gb ××gb／t ××

The national standards are numbered as follows:

According to the Measures for the Administration of National Standards in Response to the Notice, the national standard number consists of the national standard code, the standard sequence number and the year of the standard issuance. The code of the mandatory national standard is "GB", and the code of the recommended national standard is "GB T".

According to the "Measures for the Administration of Industry Standards", the industry standard number consists of the industry standard code, the standard sequence number and the standard release year. The code of the industry standard is approved by the competent administrative department of standardization.

According to the Measures for the Administration of Local Standards, the local standard number consists of the local standard code, the sequence number and the year of issuance. The code of the local standard is dbxx t, and xx is the first two digits of the administrative division. The local standard numbering rules for districted cities are provided for separately.

According to the "Provisions on the Management of Group Standards (Trial)", the group standard number is composed of the group standard code, the social group code Qingming, the group standard sequence number and the era number. The social group code is drawn up by the social group itself, and can use capital Latin letters or a combination of capital Latin letters and Arabic numerals. Social group codes shall be lawful and must not duplicate existing standard codes.

According to the "Measures for the Management of Enterprise Standardization", the enterprise standard number consists of the enterprise standard code (Q), the enterprise code, the standard master sequence number and the release year number.

Main introduction:

The form of international and foreign standard numbers is different, but the basic structure is, standard code + professional class number + sequence number + era number. Among them, most of the standard codes use abbreviated letters, such as IEC stands for the International Electrotechnical Commission, API stands for the American Petroleum Institute, and ASTM stands for the American Society for Testing and Materials.

Professional class numbers vary according to the classification methods they use, and there are three forms: alphanumeric and alphanumeric mixture; The form of the sequence number and the year number in the standard number is basically the same as that in China. The ISO code and mixed format of the international standard are ISO + standard number + bar + sub-standard number + colon + publication year and the square bracket is optional, such as ISO8402:1987 and ISO9000-1:

1994 is the number of the ISO standard.