1.Confirm thread standard, distinguish NPT/BSP
2.Check thread precision with go/no-go gauges
3.Threads free of burrs and damage, complete chamfer
4.Adopt forged parts with material certificates
5.Smooth fitting; pressure test for high-pressure items
Address: High-Tech Industrial Park, Laoshan,Qingdao China
Phone: 86-532-88910996
Email: info@yingliqd.com