Ball valve quality appraisal

ball valve is a valve whose opening and closing parts (ball) are driven by the valve stem and rotate around the axis of the valve stem. The main function of the ball valve is to control the flow direction and flow rate of the fluid, including the use of switches and shut-off valves. The advantages of ball valves include small fluid resistance, not easily eroded by the medium, and can be closed tightly in the pipeline with only a 90-degree rotation and a small rotational torque.
ball valves come in various types, including internally threaded ball valves, needle valves, etc., which are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, steel and other industries.
In ball valve quality appraisal cases, Zhongke Testing can provide ball valve quality appraisal services.

ball valves come in various types, including pneumatic, manual, electric ball valves, fixed, floating, elastic ball valves, low temperature, high temperature, normal temperature ball valves, stainless steel, carbon steel, aluminum alloy, ceramic, plastic ball valves, etc.

GB/T 26146-2010 Eccentric semi-ball valve
GB/T 21385-2008 Metal sealing ball valve
GB/T 37842-2019 Thermoplastic ball valve
GB/T 37827-2019 Welded ball valve for urban heating
GB/T 12237-2021 Steel ball valve for petroleum, petrochemical and related industries
GB/T 30818-2014 Fully welded ball valve for oil and natural gas industrial pipeline transportation system
CB/T 4480-2017 Marine stainless steel ball valve
HG/T 3220-2016 Glass-lined ball valve
JB/T 12625-2016 Ball valve for liquefied natural gas
JC/T 2305-2015 Cast stone wear-resistant ball valve
0JB/T 11492-2013 Copper ball valves and globe valves for gas pipelines
1JB/T 11522-2013 Ball valves for air conditioning and refrigeration equipment
2T 7745-1995 Pipeline ball valves
3

During the construction of an apartment, a batch of copper ball valves were purchased and installed in the water pipes. After being put into use, water leakage occurred. There happened to be no one in the house at that time. When it was discovered, the floor, wiring, etc. were all flooded to varying degrees, and a batch of the owner's goods were also soaked, causing great losses.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the copper ball valve involved in the case.
quality analysis results: The
quality analysis expert group discussed the relevant information, testing and analysis of the PVC materials involved in the case and made a comprehensive quality technical analysis, and made the following suggestions and conclusions:
The copper ball valve involved in the case has quality problems with some of the sealing rings of the copper ball valve, and its materials do not comply with national regulations. Once used normally, water leakage may occur.
Therefore, the copper ball valve involved in the case has quality problems, does not meet the requirements of national standards, and cannot be used for normal work.