JB/T 6972-1993Microporous exhaust silencers - Measurement methods (English PDF)

1 Foreword

JB/T 6972-1993 was issued by Ministry of Industry and Information Technology of the People's Republic of China on 27 July 1993 and has been in force since 1 July 1994.

The JB/T prefix marks a recommended standard. It is not law in itself: it becomes binding when a contract names it, when a regulation or a mandatory standard refers to it, or when a producer declares conformity with it.

The document runs to 15 pages in English translation.

2 Scope Preview

JB/T 6972-1993 carries no ICS number and no Chinese Standard Classification code.

This catalogue holds 21,922 other JB/T standards.

Of the 5,298 JB/T standards that do carry an ICS number, 1,460 (28%) fall under ICS 25, in the field of manufacturing engineering.

3 About this standard

Issued by: Ministry of Industry and Information Technology of the People's Republic of China

English translation: about 15 pages

4 Related standards

Standards on related subjects:

GB/T 1859.1-2015 — Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 1: Engineering method

GB/T 1859.2-2015 — Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 2: Survey method

JB/T 11880.1-2014 — Diesel Engines-Selective Catalytic Reduction (SCR) Systems - Part 1: General Requirements

JB/T 6012.2-2025 — Internal combustion engine - Intake and exhaust valves - Part 2: Metallographic examination

JB/T 8579-2024 — Internal combustion engines-Intake and exhaust manifolds

JB/T 9750.1-2023 — Internal combustion engines - Specification of rocker arms and rocker arm shafts - Part 1: Rocker arms

5 Classification and status

Chinese Standard Classification (CCS): Z 32

Prefix JB/T: recommended standard.