T/NDAS 20-2020 Abolished Group standards

T/NDAS 20-2020 Dustproof silencer

Publish Date: 2020-12-26 Implement Date: 2020-12-26 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/NDAS 20-2020

Standard Type: Group standards

Standard Status: Abolished

is_force_gb: no

CCS Name: Labor safety technology

ICS Name: \nNoise (related to humans)

Publish Date: 2020-12-26

Implement Date: 2020-12-26

Scope

Scope: This document specifies the models, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of dust-proof silencers. This document is applicable to silencer products used in industrial fields and the cement industry, etc. Main technical content: 1. Scope: This document specifies the models, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of dust-proof silencers. This document is applicable to silencer products used in industrial fields and the cement industry, etc. 2. Terms and Definitions: This document defines the terms "dust-proof silencer", "insertion loss", and "power loss ratio". 3. Model: This document specifies the models of dust-proof silencers. 4. Requirements: This document specifies the basic requirements, appearance and processing quality requirements, and technical requirements of dust-proof silencers. 5. Test Methods: This document specifies the test methods for various requirements of dust-proof silencers. 6. Inspection Rules: This document specifies the items and requirements for factory inspection and type inspection of dust-proof silencers. 7. Marking, Packaging, Transportation, and Storage: This document specifies the packaging and labeling of dust-proof silencers, as well as their packaging and storage methods.

Development Information

Related Standards

GB/T 3239-1982 Active

GB/T 3239-1982 Expression of physical and subjective magnitudes of sound and noise in air

Publish Date: 1982-06-08

GB/T 4963-1985 Replaced

GB/T 4963-1985 Normal equal-loudness contours for pure tones under free field listening conditions

Publish Date: 1985-02-28

GB/T 7582-1987 Replaced

GB/T 7582-1987 Acoustics—Threshold of hearing by air conduction as a function of age and sex for otologically normal persons

Publish Date: 1987-03-27

GB/T 7583-1987 Active

GB/T 7583-1987 Acoustics—Pure tone air conduction threshold audiometry—For hearing conservation purposes

Publish Date: 1987-03-27

GB 14227-1993 Replaced

GB 14227-1993 Noise limits on platform of subway station

Publish Date: 1993-03-06

GB/T 14228-1993 Replaced

GB/T 14228-1993 Measurement for noise on platform of subway station

Publish Date: 1993-03-06