~CNG pipe standard
Tube surface with 5-7 um zinc coated, which can keep 52~80 hour salt spray test without red rust.
Both ends of tube without rag, corner processing, smooth, absence of distortion.
CNG pipe is welding pipe with annealing treatment before zinc plating.
Inside of pipe should be no rust
Bending pipe with tools of 25mm radius, bending torsion should no more than 11NM
PVC package requirement
CNG pipe should be covered with PVC after zinc plating, single wall thickness is 0.65±0.2mm.
There is 20-50mm naked tube without PVC at the roll ends. Both ends are fit with white plastic jacket.

Prime Qualiy
All follow ISO 15500-16-2001 standard.
Updated equipment & advanced workmanship & mature and stable
production line.
Strict quality-monitoring system, 9 steps inspection procedure from manufacture to leaving factor.
Select prime materials of copper/steel and produce metal tubes by ourselves.
Every pc of metal tube should pass 5 min pressure testing under 35-40Mpa before coated with PVC.
7‰ proportion samples from the bulk production must pass 3min under 85-100Mpa testing.
Products obtain good reputation & & feedbacks around the world.

 Sorts
Low carbon steel tube
Copper tube
Seamless stainless steel tube
Stainless steel tube

 Characteristics
Highest blasting pressure to ensure the safety.
Good curvature property for easy installation.
Even thickness PVC coating bind the metal tube relevantly providing with effective protection.
Good extension property of the tube to ensure the ends joint easily.
Products quality have reach international advanced level.