How To Identify Qualified LPG Cylinders

How To Identify Qualified LPG Cylinders

There is a metal ring or metal sheet at the connection between the cylinder valve and the cylinder body. This is the inspection ring (card) for regular inspection of the cylinder. The inspection ring (card) indicates the next inspection time, and can be used continuously during this period.

Sometimes we will encounter a cylinder without inspection ring (brand), is it a qualified cylinder? The steel cylinders that have not been inspected may be newly manufactured and used for less than four years, and have not undergone the first inspection, so there is no inspection ring (brand).

So how to judge whether this cylinder is new? The factory date and expiration date of the cylinder will be displayed on its guard. For example, the steel stamp on the guard shows "2021.05-2029.04", which means that the cylinder is manufactured in May 2021 and designed to be used until April 2029. The cylinder will be used until April 2025, and it needs to be sent to a qualified inspection unit for inspection. Before April 2025, it is normal that this cylinder does not have a test ring (card), but since May 2025, there is no ring (card), indicating that it is an expired bottle.
Cylinders cannot be used in the following circumstances:

1. Cylinders made by unlicensed manufacturers shall not be used.

2. Cylinders that exceed the inspection period shall not be used.

3. Cylinders that fail to pass the inspection or have reached the end of life shall not be used.

4. Cylinders with loose or falling off the cylinder shield or broken welding joints and cracked butt joints of the cylinder body shall not be used.

5. Cylinders with cylinder base falling off, cylinder body deformation, corrosion, rupture and serious wear shall not be used.

6. Welding the cylinder body and changing the seal or color mark of the cylinder shall not be used.

7. Cylinders whose valve exceeds the designed service life shall not be used.