Westpac Marine Services, Inc.

Hydrotesting Compressed Gas Cylinders

Westpac is certified to hydrotest high pressure compressed gas cylinders. From the smallest paintball to 100 pound CO2 cylinders we offer fast, economical service. Our test equipment is able to handle test pressures up to 10,000 psi. For cylinders used in SCUBA applications (or ones that are of similar size or smaller) we offer both internal and external cleaning options.

If you have an older aluminum cylinder that needs eddy current testing to check for sustained load cracking, we have that capability (although many SCUBA shops refuse to fill these cylinders even if they have current certification).

We can hydrotest paintball cylinders although we do not have the necessary wrenches to remove the valve/regulator assembly. Prior to bringing the cylinder in, have your local paintball supplier remove the valve.

Rule of thumb on retest intervals, and as with every good rule there are exceptions:

  • Steel cylinders: every 5 years
  • Aluminum cylinders: every 5 years
  • Carbon fiber wrapped cylinders: every 5 years with a 15 year life span

The 15 year life span on wrapped cylinders like are used for breathing air and paintball allows them to be used for 15 years from the date of manufacture. When you reach 15 years plus 1 day the cylinder MUST be removed from service even if it is not due for hydrotesting or does not need a refill. We understand that this requires an extra degree of vigilance when the cylinder is getting near the end of its life but this is the way the Federal regulations are written.

In the United States all cylinders must be DOT approved in order to be refilled and/or transported. SCUBA cylinders purchased abroad that are not DOT approved can not be used. There are special exceptions when you are exporting a cylinder but they do not apply for use here. The DOT is extremely concerned about the safety of cylinders made in other countries with lesser requirements and oversight.

Customers ask why we charge if a cylinder fails. For us, failing a cylinder requires just as much work as passing one. The testing is the same, recordkeeping the same and accounting paperwork the same. We wouldn't stay in business if we worked for free so yes, the charge is the same pass or fail.


revised 2/2015