Pipeline Safety Division - Hydrostatic Testing
One of the primary ways in which California pipeline safety standards exceed the minimum federal standards is in pipeline integrity testing. Federal regulations mandate that a pipeline system be hydrostatically tested before initial operation begins. California laws mandates that each pipeline system be tested at least every five years by an independent third-party approved by the Office of the State Fire Marshal (SFM). In these hydrostatic tests the hazardous liquid is removed from the pipe and replaced with water. The pipe is then pressurized to 125% of the maximum pipeline operating pressure and held for eight hours. Testing results are submitted to SFM for review and concurrence. Tests are randomly witnessed by SFM engineers. In certain cases, SFM has approved the use of internal inspection tools "smart pigs" in lieu of hydrostatic testing. In these cases, the test results are also submitted to the SFM for review and concurrence.
Initial Application Approval as an Independent Hydrostatic Testing Firm click here.
Notification of Proposed Pig Run or Hydrostatic Test; click here.
List of Approved Hydrostatic Testing Company:
Approved Hydrostatic Testing Company; click here.
Pressure Testing Requirements for Hazardous Liquid Pipelines in California:
Student Manual; click here.