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Position: Chinese Standard in English/QC/T 29117.22-1993
QC/T 29117.22-1993   Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler (English Version)
Standard No.: QC/T 29117.22-1993 Status:abolished remind me the status change

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Language:English File Format:PDF
Word Count: 2500 words Price(USD):80.0 remind me the price change

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Implemented on:1994-1-1 Delivery: via email in 1 business day
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Standard No.: QC/T 29117.22-1993
English Name: Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler
Chinese Name: 摩托车和轻便摩托车产品质量检验 排气消声器质量评定方法
Chinese Classification: T80    Motorcycles in general
Professional Classification: QC    Professional Standard - Automobile
Issued on: 1993-10-20
Implemented on: 1994-1-1
Status: abolished
Abolished on:2005-04-15
Language: English
File Format: PDF
Word Count: 2500 words
Price(USD): 80.0
Delivery: via email in 1 business day
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler 1 Subject content and applicable scope This standard specifies the performance evaluation method of exhaust muffler for motorcycles and mopeds by sampling inspection. This standard is applicable to performance sampling inspection, supervision and management, grade evaluation and new product identification of exhaust muffler for motorcycles and mopeds. 2 Normative references GB/T 2828 Sampling procedures and tables for lot-by-lot inspection by attributes GB/T 3241 Octave and third-octave band filters used for the analysis of sound and vibration GB/T 3785 Electric, sonic properties and measuring methods for sound level meters GB/T 5363 Method of bed test of gasoline engine for motorcycles and mopeds 3 Sampling requirements 3.1 Sampling object Formally approved finished mufflers that are mass-produced or batch-produced in this evaluation period, and have passed the acceptance inspection conducted by the inspection department of the enterprise. 3.2 Sampling method Random sampling. 3.3 Sampling period The sampling period is one year for inspection by departments. The sampling period and quantity of self-inspection shall be determined by the enterprise at discretion.   3.4 Sampling quantity When the inspection department conducts random sampling inspection from time to time, three mufflers shall be extracted at a time for inspecting performance, leakproofness, appearance and assembly quality (one substitute pipe shall be provided by the manufacturer). One of the three can only be used for testing reliability (vibration resistance). 3.5 Sampling base For sampling in the finished product warehouse of the manufacturer, the sampling base shall be greater than 20 times the sample size. For sampling in assembly site and users’ places, sampling base will not be restricted. 3.6 Double sampling Double sampling is not allowed for any inspections, except that one double sampling is allowed for unqualified products identified in factory self-inspection (in the double sampling inspection, twice amount of unqualified samples shall be inspected for unqualified items and related items, and the products subject to double sampling inspection can only be graded as acceptable products or below). 4 Terms 4.1 exhaust muffler air duct with special structure or sound-absorbing lining that can effectively reduce the exhaust noise of engine 4.2 measure of muffler measure of engine power and exhaust noise to install the muffler to be tested 4.3 substitute pipe hollow pipe with the same boundary dimension and wall thickness as the muffler to be tested 4.4 measure of hollow pipe measure of engine power and exhaust noise to install the substitute pipe   4.5 insertion loss difference of sound power levels radiated through the exhaust port during measure of hollow pipe and measure of muffler Note: Under normal circumstances, the size, shape and sound field distribution of the pipe orifice remain approximately the same, so the insertion loss is equal to the difference of sound pressure levels before and after installing the muffler at a given measuring point. 4.6 power loss ratio ratio of the difference between powers obtained in measure of hollow pipe and measure of muffler respectively to the power value obtained in measure of hollow pipe when the carburetor throttle is fully open at the rated speed of the engine 5 Technical requirements 5.1 The muffler assembly, parts and components shall be manufactured according to the drawings and technical documents approved by the prescribed procedures, and shall meet the requirements of this standard. In case of involving its performance, installation and interchangeability, the remodel design of muffler can only be carried out with the consent of the relevant competent department. 5.2 The metal stamping parts of muffler shall meet the technical requirements concerned. External surface shall be subjected to rust-proof treatment. 5.3 Non-metallic parts of muffler shall have corrosion resistance, and can work normally within the service conditions and service temperature range. 5.4 The shell and partition of muffler shall have sufficient rigidity and thickness to prevent regenerative noise caused by airflow and surface radiation noise greater than exhaust noise. 5.5 Muffler and its parts shall be welded firmly with smooth and uniform welds and without obvious welding defects such as lack of weld, blowholes, overlaps, slag inclusion and excessive penetration. They shall also be free of internal foreign matters such as slags. 5.6 The muffler shall have smooth and flat appearance and protective coating on the surface. The surface of such coating shall be firm, uniform in color and free of obvious bumps and abrasions. 5.7 The connection of the inlet end of the muffler and the engine must be sealed reliably and free of air leakage.
1 Subject content and applicable scope 2 Normative references 3 Sampling requirements 4 Terms 5 Technical requirements 6 Test apparatus 7 Test items 8 Test methods 9 Evaluation method Additional explanation:
Referred in QC/T 29117.22-1993:
*GB/T 2828-1987 Sampling procedures and tables for lot-by-lot inspection by attributes (Apply to inspection of successive lots or batches)
*GB/T 3241-2010 Electroacoustics - Octave-band and fractional-octave-band filters
*GB/T 3785-1983 Electric, sonic properties and measuring methods for sound level meters
*GB/T 5363-2008 Method of bench test of engine for motorcycles and mopeds
*MT/T 199-1996 General specifications for hydraulic drill jumbos for coal mine
*SH/T 0192-1992 Determination of the Aging Characteristics of Lubricating Oil
*GB/T 20314-2017 Thin float glass for liquid crystal display(LCD) applications
*QC/T 260-1998 Center High Mounted Stop Lamp
*DL/T 1672-2016 Aluminium tube bundles used in indirect air cooling system of thermal power plant
*TB/T 1950-1987 Design Parameter for Railway Tank Car Body
*TB/T 1613-1985 Design Parameter of Truck Hand Braking Device Design
*GB/T 7467-1987 Water Quality - Determination of Chromium (VI) - 1, 5 Diphenylcarbohydrazide Spectrophotometric Method
*GB/T 10180-2017 Thermal performance test code for industrial boilers
QC/T 29117.22-1993 is referred in:
*CJJ 44-1991 Code for construction and acceptance of municipal road base works
*CNCA C11-01-2014 China Compulsory Certification Implementation Rules - Motor vehicle [Including CNCA 2017 No.1 Announcement - Modification List]
*GB 2726-2016 Hygienic standard for cooked meat products
*YD/T 1582-2010 800MHz/2GHz cdma2000 digital cellular mobile communication network:signaling link access control (LAC) of air interface specification
*TSG 24-2015 Supervision Regulation on Safety Technology for Hyperbaric Oxygen Chambers
*QC/T 418-1999 Technical requirements o fblade connector for automobile
*GB/T 34590.9-2017 Road vehicles-Functional safety-Part 9: Automotive Safety Integrity Level (ASI L) -oriented and safety-oriented analyses
*DB44/26-2001 Discharge limits of water pollutants (Guangdong)
*QC/T 533-1999 Test method for bench of automobile drive axle
*QC/T 546-1999 Automotive Shock Absorber cleanliness limits and determination
*QC/T 29017-1991 Automotive molded plastic parts without individual tolerance limit the size of the deviation
*QC/T 293-1999 Test methods of automotive axle shaft
*TB/T 2879.1-1998 Railway Rolling Stock - Paint and Painting - Part 1: Technical Specification for Supply of Paints
Code of China
Standard
QC/T 29117.22-1993  Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler (English Version)
Standard No.QC/T 29117.22-1993
Statusabolished
LanguageEnglish
File FormatPDF
Word Count2500 words
Price(USD)80.0
Implemented on1994-1-1
Deliveryvia email in 1 business day
Detail of QC/T 29117.22-1993
Standard No.
QC/T 29117.22-1993
English Name
Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler
Chinese Name
摩托车和轻便摩托车产品质量检验 排气消声器质量评定方法
Chinese Classification
T80
Professional Classification
QC
ICS Classification
Issued by
Issued on
1993-10-20
Implemented on
1994-1-1
Status
abolished
Superseded by
Superseded on
Abolished on
2005-04-15
Superseding
Language
English
File Format
PDF
Word Count
2500 words
Price(USD)
80.0
Keywords
QC/T 29117.22-1993, QC 29117.22-1993, QCT 29117.22-1993, QC/T29117.22-1993, QC/T 29117.22, QC/T29117.22, QC29117.22-1993, QC 29117.22, QC29117.22, QCT29117.22-1993, QCT 29117.22, QCT29117.22
Introduction of QC/T 29117.22-1993
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative. Quality inspection of products for motorcycles and mopeds Quality evaluation method of exhaust muffler 1 Subject content and applicable scope This standard specifies the performance evaluation method of exhaust muffler for motorcycles and mopeds by sampling inspection. This standard is applicable to performance sampling inspection, supervision and management, grade evaluation and new product identification of exhaust muffler for motorcycles and mopeds. 2 Normative references GB/T 2828 Sampling procedures and tables for lot-by-lot inspection by attributes GB/T 3241 Octave and third-octave band filters used for the analysis of sound and vibration GB/T 3785 Electric, sonic properties and measuring methods for sound level meters GB/T 5363 Method of bed test of gasoline engine for motorcycles and mopeds 3 Sampling requirements 3.1 Sampling object Formally approved finished mufflers that are mass-produced or batch-produced in this evaluation period, and have passed the acceptance inspection conducted by the inspection department of the enterprise. 3.2 Sampling method Random sampling. 3.3 Sampling period The sampling period is one year for inspection by departments. The sampling period and quantity of self-inspection shall be determined by the enterprise at discretion.   3.4 Sampling quantity When the inspection department conducts random sampling inspection from time to time, three mufflers shall be extracted at a time for inspecting performance, leakproofness, appearance and assembly quality (one substitute pipe shall be provided by the manufacturer). One of the three can only be used for testing reliability (vibration resistance). 3.5 Sampling base For sampling in the finished product warehouse of the manufacturer, the sampling base shall be greater than 20 times the sample size. For sampling in assembly site and users’ places, sampling base will not be restricted. 3.6 Double sampling Double sampling is not allowed for any inspections, except that one double sampling is allowed for unqualified products identified in factory self-inspection (in the double sampling inspection, twice amount of unqualified samples shall be inspected for unqualified items and related items, and the products subject to double sampling inspection can only be graded as acceptable products or below). 4 Terms 4.1 exhaust muffler air duct with special structure or sound-absorbing lining that can effectively reduce the exhaust noise of engine 4.2 measure of muffler measure of engine power and exhaust noise to install the muffler to be tested 4.3 substitute pipe hollow pipe with the same boundary dimension and wall thickness as the muffler to be tested 4.4 measure of hollow pipe measure of engine power and exhaust noise to install the substitute pipe   4.5 insertion loss difference of sound power levels radiated through the exhaust port during measure of hollow pipe and measure of muffler Note: Under normal circumstances, the size, shape and sound field distribution of the pipe orifice remain approximately the same, so the insertion loss is equal to the difference of sound pressure levels before and after installing the muffler at a given measuring point. 4.6 power loss ratio ratio of the difference between powers obtained in measure of hollow pipe and measure of muffler respectively to the power value obtained in measure of hollow pipe when the carburetor throttle is fully open at the rated speed of the engine 5 Technical requirements 5.1 The muffler assembly, parts and components shall be manufactured according to the drawings and technical documents approved by the prescribed procedures, and shall meet the requirements of this standard. In case of involving its performance, installation and interchangeability, the remodel design of muffler can only be carried out with the consent of the relevant competent department. 5.2 The metal stamping parts of muffler shall meet the technical requirements concerned. External surface shall be subjected to rust-proof treatment. 5.3 Non-metallic parts of muffler shall have corrosion resistance, and can work normally within the service conditions and service temperature range. 5.4 The shell and partition of muffler shall have sufficient rigidity and thickness to prevent regenerative noise caused by airflow and surface radiation noise greater than exhaust noise. 5.5 Muffler and its parts shall be welded firmly with smooth and uniform welds and without obvious welding defects such as lack of weld, blowholes, overlaps, slag inclusion and excessive penetration. They shall also be free of internal foreign matters such as slags. 5.6 The muffler shall have smooth and flat appearance and protective coating on the surface. The surface of such coating shall be firm, uniform in color and free of obvious bumps and abrasions. 5.7 The connection of the inlet end of the muffler and the engine must be sealed reliably and free of air leakage.
Contents of QC/T 29117.22-1993
1 Subject content and applicable scope 2 Normative references 3 Sampling requirements 4 Terms 5 Technical requirements 6 Test apparatus 7 Test items 8 Test methods 9 Evaluation method Additional explanation:
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Keywords:
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