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Database: 189760 (18 Oct 2025)
JB/T 6012.4-2008 English PDF
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JB/T 6012.4-2008
: Internal combustion engines. Intake and exhaust valves. Part 4: Friction welding valves. Ultrasonic testing
Status: Valid
Standard ID
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Standard Title (Description)
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JB/T 6012.4-2008
English
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Internal combustion engines. Intake and exhaust valves. Part 4: Friction welding valves. Ultrasonic testing
Valid
JB/T 6012.4-2008
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Basic data
Standard ID
JB/T 6012.4-2008 (JB/T6012.4-2008)
Description (Translated English)
Internal combustion engines. Intake and exhaust valves. Part 4: Friction welding valves. Ultrasonic testing
Sector / Industry
Mechanical & Machinery Industry Standard (Recommended)
Classification of Chinese Standard
J93
Classification of International Standard
27.020
Word Count Estimation
8,859
Date of Issue
2008-06-04
Date of Implementation
2008-11-01
Older Standard (superseded by this standard)
JB/T 5093-1991
Quoted Standard
GB/T 9445; GB/T 12604.1; JB/T 4008; JB/T 4009; JB/T 6012
Regulation (derived from)
NDRC Notice No. 38 of 2008
Issuing agency(ies)
Ministry of Industry and Information Technology
Summary
This standard specifies the direct longitudinal wave ultrasonic inspection bimetallic bar valve friction welding method of welding defects and evaluation criteria. This standard applies to less than 200mm diameter cylinder reciprocating piston internal combustion engine valve double metal friction welding rods are also available for valve semi-finished products when used with reference to ultrasonic testing.