On Nov 28 ,2019,Chengdu Common Tube Group got the certificate of NSF from USA .
NSF International was founded in 1944 from the University of Michigan's School of Public Health as the National Sanitation Foundation (NSF) to standardize sanitation and food safety requirements. It is an accredited, independent third-party certification body that tests and certifies products to verify they meet these public health and safety standards. Products that meet these standards bear the NSF mark.
To know more about the certificate ,you can visit :