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How many kinds of national standards are there?
National standards are divided into mandatory national standards and recommended national standards.

Our national standard code is divided into GB and GB/T. The serial number of the national standard consists of the code number of the national standard, the serial number of the national standard and the year (release year) of the national standard. The national standard of GB code contains mandatory provisions and recommended provisions, but it does not contain recommended provisions when the full text is mandatory provisions. Full text recommendation of GB/T code national standard.

Mandatory provisions are standards for protecting human health, personal and property safety and national standards enforced by laws and administrative regulations; Recommended national standards refer to the national standards voluntarily adopted through economic means or market regulation in production, inspection and use.

However, once the recommended national standards are accepted and adopted, or the parties agree to be included in the economic contract, it becomes the technical basis that all parties must abide by and is legally binding.

Extended data

A national standard usually consists of three parts: cover, preface and text.

1. standard number: the standard number consists of at least three parts: code number, serial number and release year of the standard.

2. Standard status: from the date when the standard is implemented to the time when the standard is reconfirmed, revised or abolished, it is called the standard validity period; Also known as the standard age.

3. Centralized unit: In fact, it refers to the management of standards according to the powers and responsibilities entrusted by the state to departments and specific management channels.

4. Substitution: In the standard literature, substitution means that the new standard replaces the old standard. That is, from the date when the new standard is issued, the old standard that was originally replaced will be invalid. In another case, a standard has been abolished and there is no new standard to replace it.

5. Implementation date: The implementation date of the standard refers to the time when the standard takes effect after being approved and issued by the relevant administrative department.

6. Proposing unit: refers to the department that proposes to implement a certain standard.

7. Drafting unit: the department responsible for writing a certain standard.

Baidu Encyclopedia-National Standard