Set of NGV-2b 90-DGE Saddle CNG Tank

Is this ASME or DOT rated, and what does that allow me to do with it?

This is DOT Type 4 rated and certified to ANSI NGV2b-2012, which qualifies it for natural gas vehicle fuel storage applications. DOT NGV cylinders are specifically designed for vehicle-mounted CNG fuel systems and cannot be repurposed for stationary storage, which requires ASME Section VIII certification. This tank was previously installed on Class 8 trucks and is suitable for similar mobile CNG fuel applications.

What is the MAWP and capacity at service pressure?

The service pressure is 3,600 psig, which is the maximum allowable working pressure for this NGV cylinder. The listing provides physical dimensions of 90" x 26" for this saddle-mount configuration but does not specify water capacity in gallons or standard cubic feet (scf) of natural gas storage—contact the seller for volumetric capacity and DGE (diesel gallon equivalent) rating.

What is the requalification or inspection status?

Current hydrostatic test certification is valid through 02-2034. DOT Type 4 composite NGV cylinders certified to ANSI NGV2b-2012 typically require visual inspection every three years and hydrostatic requalification every three to five years depending on service conditions, so this unit appears current with a substantial remaining certification window.

What should I inspect before putting it into service?

Inspect the composite overwrap for impact damage, abrasion, or delamination, particularly on the saddle contact surfaces and underside where road debris strikes. Check all mounting hardware, brackets, and the boss assembly for cracks or corrosion, and verify the PRD (pressure relief device) date code and service life with the seller. On Type 4 cylinders, also inspect the liner-to-boss interface and confirm the previous mounting configuration is compatible with your installation before committing to retrofitting brackets or plumbing.