Cylinder Hydrostatic Retesting

Definition: a test designed to indicate expansion characteristics and resign from service the cylinders that are on track to catastrophically fail with further use. The test utilizes water pressure to find the permanent expansion of a cylinder, measured in cubic centimeters. To indicate “pass” or “fail”, the operator compares the resultant expansions (elastic and permanent) to the permanent expansion and/or the rejection elastic expansion specified in a cylinder’s special permit or exemption, or foretold in the cylinder’s specification parameters.

Slang: “hydro”, “hydro test”.

Required by DOT in the United States. The interval varies between specifications and special permits. We can show you what your cylinder markings mean.

 

 

Southern Indiana Scuba has been an operable cylinder Hydrostatic Retesting facility for over 20 years. We are RIN holder D486, and we offer hydrostatic retesting on DOT3AL, DOT3A, DOT3AA, and DOT3HT cylinders, and most DOT special permit cylinders. We also offer hydrostatic retesting on ISO cylinders.

If you have any questions, please feel free to give us a call at (812) 824-7234.