JB/T 8579-1997 This standard specifies the technical requirements, inspection methods, inspection rules and marking, packaging, transportation and storage of the intake and exhaust pipes of internal combustion engines. This standard applies to the intake and exhaust pipes of reciprocating piston internal combustion engines with a cylinder diameter less than or equal to 200mm. JB/T 8579-1997 Technical conditions for intake and exhaust pipes of internal combustion engines JB/T8579-1997 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 8579-1997
Technical Conditions for Intake and Exhaust Pipes of Internal Combustion Engines
Published on June 20, 1997
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1998
JB/18579-1997
This international standard for internal combustion engine standards is proposed and centralized. The drafting units of this standard are: Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery Industry, and Jiangsu Yancheng Duowei (Group) Internal Combustion Engine Intake and Exhaust Pipe Co., Ltd. The main drafters of this standard are Shao Qiu, Gao Cheng, Shan Ya, Lao Yuan
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Intake and Exhaust Pipes of Internal Combustion Engines
JR/T 8=79-—1997bzxZ.net
This standard specifies the technical requirements, inspection methods, rules and markings for flash combustion engines, including transportation and storage. This standard is applicable to the exhaust of conventional internal combustion engines with a diameter less than or equal to 2C0. Z Cited Standards
The provisions contained in the following standards become the provisions of this standard through reference by the user. At the time of publication of this standard, the versions shown are valid: All standards are subject to revision, and the possibility of using the latest versions of the following standards may be explored. GB-8I
G23R87
GBE31-8
G3/T 13: -1993
GB/T 117395
GIS/T1N-U
C31953-80
GB2829-R2
GS 6C60.1-5s
GR 6t61.3-&:
GB641!86
GB?3U78?
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, Technical requirements
Consulting tolerance and fit (diameter 1~3%5mm) Tensile test method
Conceptual mesh test method
Surface roughness number and its value
Cast aluminum
Shape and position tolerance Unknown tolerance value
Shape and position tolerance inspection specification
Inspection schedule and sample table (applicable to inspection of subsequent batches of chain) Surface roughness comparison sample Surface roughness comparison sample
Component small tolerance
Non-threaded thread
Point-to-point parts
Ink and steel
Grinding, flange, short, milling, facing and planing and mounting surface 3. [
world exhaust pipe should be approved by the planning library design element diagram selected technical documentation method. 3.2 Note on material
3.2. The gray cast brand of the exhaust standard is not guaranteed by the G3 specified in IT1C: bitter to the common material, the original child of the product evaluation,
is the time to manage the gas flow quality of the product delivery library regulations: 3. The semi-purple wear and shape or the
.1.1 parts are not allowed to be cast in the street 3.3.1.! The rotating parts are not allowed to have any defects such as cold insulation, shrinkage, sand support, "sub-sand" and other defects that reduce the visibility of the parts or affect the processing time before cutting.
3.3.1.2 The inner cavity of the inlet and outlet pipes is not allowed to have any defects such as sand sticking, seams, knots and other defects that affect the exhaust state. 3.3.1.3 The surface of the exhaust pipe and the air cover is not allowed to have any casting defects that do not meet the requirements. Approved by the Ministry of Machinery Industry on June 20, 1997
1998-01 -01 Implementation
3.3.2 The defects allowed in the process
JB.T879-1997
3.3.2.1 The total number of non-standard items is not more than 5%, the diameter is not more than 1mm, the depth is not more than 1.5mm, and the spacing is not less than m.
3.3.2.2 The area of ​​the other items is not more than 80% of the density and the single diameter is not more than 1.5 m, the depth is 1 mm, and the number is not more than 3 3.3.3.1 Repairs of scattered and dense gas holes are not allowed. 33.3.2 Repairs of casting defects on the joint surfaces and screw holes of inlet and exhaust pipes are not allowed. 3.3.3.3 Except for the parts specified in 3.3.3.1 and 2.3.3.2, all other defects can be repaired, but the castings after repair must meet the requirements of this standard. 3.3.4 The surface roughness of the castings shall meet the requirements of R,50 specified in GB6060.1. 3.4 Dimension tolerances 3.4.1 The dimensions of castings such as inlet and exhaust pipes shall not meet the CT grade in GB6414, and the size shall meet the CT9 grade. 3.4.2 The tolerance grade of cylinder machining, the outer diameter shall meet the IT13 grade, and the length tolerance shall meet the IT14 grade. 3. 4.3 The screw thread tolerance on the exhaust pipe shall comply with GB 197 and GB 73C7. The screw thread tolerance shall meet the requirements of GB197 7H tolerance level: the screw thread tolerance shall meet the requirements of B73GT B level. 3.5 The shape and position tolerances of the exhaust pipe and the exhaust pipe shall meet the requirements of B/T1184 when the shape and position tolerances are not specified. 3.6 The surface roughness of the exhaust pipe and the exhaust pipe shall meet the requirements of GB/1031. The surface roughness of the exhaust pipe and the exhaust pipe shall meet the requirements of GB/1031. 3. The surface of the intake pipe should be painted with anti-rust paint (except for the intake pipe with colored gold), and the surface of the injection-molded exhaust pipe should be uniform, shiny, firm, and free of bubbles, peeling, accumulation, etc. 4. Inspection method
4.! 5
4.1. [The resistance of the exhaust pipe and the exhaust pipe shall be tested by the test method in accordance with P9439GB/T1173 dynamic m4403, etc. 1.1.2 Test method: tensile test according to GB223. 2. 1.1.2 Test method: tensile test according to GB223. 2. 1.1.2 Test method: tensile test according to GB223.
4.2 2 The test equipment is specified in 82,
4.3 The manufacturing effect and external quality of the parts shall be monitored by visual inspection step by step. 4.4 The surface roughness of the casting surface shall be compared with that of the casting surface specified in GB 6060.1. 4.5 The bottom of the book is measured with a roughness value of u,2mn. 4.6 The efficiency of the inlet and exhaust gases shall be inspected based on the pressure of the corresponding grades. 4.7 The shape and position shall be measured according to the provisions of GB51S5B. 4.1 The surface condition of the gasket may be inspected by a surface roughness meter according to the provisions of GB6060.2. 4.9 The quality of the exhaust paint shall be inspected by a tester. 5 Inspection rules 5. Products must be inspected by the manufacturing quality inspection department and the products can only be released after they are certified to be qualified. 5.2 The inspection items 3.2, 3.3 and 3.4 shall be completed and inspected. 5.3 Type test
5.3.1 Type test should be carried out in any of the following situations:a) Product finalization and identification:
b) Product structure, materials and process have changed significantly:1 year after normal production
d) When resuming production after a long period of suspension:
c) When there is a big difference between factory inspection or user sampling and type test:When the superior department requires
5.3.2 Type test items shall be in accordance with the provisions of 3.2, 3.3.3.4.2.5.3.5 and 3.7. 5. →The production, marking, packaging, transportation, storage and import and control pipes shall be determined by the supply and demand parties or by the agreement of the ordering unit. 6.2 The imported and maintained gas inspection personnel shall sign a product quality certificate, and the official certificate shall indicate: 1. The manufacturer's name or address shall be marked:
2. The inner micro-tire and model number and part number shall be marked:
() Ding period,
3. The product packaging shall be recorded when the production requirements are determined. When the sales packaging is required, the outer surface of the packaging box shall be marked with:
factory and address:
h: fuel type and part number,
sales center quantity;
2. The shipping unit address:
Guangzhou Huzhuang Hong Year
5. The self-selling seat is a new standard for quality assurance under normal storage and approval: "No oil quality standard", "no ...
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