This is Vivian from Shanghai Ronghua High-pressure vessel co., ltd.
Very happy to know you.

We are a big factory in Shanghai, China, producing the CNG cylinders for vehicles.

We are manufacturing following items:
(1) CNG TYPE-1 cylinder seamless steel cylinder
(2)CNG TYPE-2 cylinder welded cylinder, composite cylinder
Standard: ISO11439 ISO9001 BV
Material: 34CrMo4 /30CrMo,
OD: 279mm/325mm/356mm/406mm (We can customize as your
requirements)
Water capacity: 40L 45L 50L 60L 70L 80L 90L 100L 110L 120L
130L etc.

We have the BV certificate in the standard ISO11439.

And most of our products are exported to Uzbekistan, Iran, South American, Malaysia Vietnam and so on.

If you still have any need in it pls let me know. Hope your interest in our cylinders and looking forwarder to hear from you.