The National Development and Reform Commission issued an announcement on January 23, deciding to abolish 436 industry standards that have been implemented for more than five years in machinery, light industry, textiles, and petrochemical industries, including 253 mechanical industry standards.
The repealed mechanical industry standards relate to machine tools, molds, bearings, and welding, including: technical conditions for safety protection of foundry machinery (JB 5545-1991) and determination of hot cracking tendency of alloys for the determination of casting properties (JB/T 4022.2-1999). ,Coupling Crack Displacement COD Test Method (JB/T 4291-1999), Accelerometer Vibration Tester for Rolling Bearings (JB/T 8561-1997), Machine Cooling System Components High Head Cooling Pump (JB/T 8650.1 -1997), General forging module blank size and weight method (JB/T 5900-1991) and so on.
There are several reasons for the abolition: the methods prescribed by the standard do not have the conditions for application in production, and enterprises do not use this method in actual production; only individual companies use it and lose the attributes of the industry standard; the standard technology content is backward and the practicality is poor; The determination of the function and structure of the market is determined by the market, and the series of spectrum standards has lost its guiding function.