Transco Pipeline Hydrostatic Testing

 Hydrostatic Testing

Hydrostatic pressure testing is one of several methods Williams uses to reconfirm the structural integrity and safety of its natural gas pipeline. Hydrostatic testing involves removing the natural gas from the line, then filling a pipeline segment with water until it is at a pressure that is higher than the pipeline will ever operate with natural gas. This allows Williams to validate the safe operating pressure of the pipeline and ensure that the line is structurally sound.

To learn more about the process, click here.



Beginning in April 2018 Williams will be performing hydrostatic testing of various segments of its Transco pipeline located in Texas.



Each test is expected to last about 15 hours. The pipeline pressure is continuously monitored for the duration of the test. You may also see Williams and/or contract personnel patrolling the pipeline right of way during the testing process.


Safety Precautions

Out of an abundance of caution, Williams is requesting for the general public to remain clear of the pipeline right of way when possible during the testing period. You may notice signage in the vicinity of the test warning pedestrians to remain clear of the pipeline right of way while the test is underway. In the event a problem occurs during a hydrostatic test, we will have personnel standing by to respond. Once the hydrostatic test is complete, the signage will be removed. Test water will be disposed of properly and the line will be returned to service.




Status: Pending

Beginning in San Patrico County just north of Sinton near Highway 181 and extending to south Victoria County west of US-77.

  • Segment A1: May 31, 2018
  • Segment A2: May 29, 2018
  • Segment A3: May 27, 2018
  • Segment A4: May 26, 2018


Status: Pending

Beginning in south Victoria County west of US-77 and extending to Edna in Jackson County.

  • Segment A5 & A6: May 23, 2018
  • Segment A7: May 19, 2018
  • Segment A8: May 18, 2018


Status: Pending

Extending from Edna to a point just north of Lake Texana in Jackson County.

  • Segment A9: June 16, 2018
  • Segment A10: May 29, 2018
  • Segement A11: May 29, 2018


SEGMENTS 10 & 11
Status: Pending

Beginning north of Lake Texana in Jackson County and extending west of Louise in Wharton County.

  • Test Start: May 24, 2018
  • Test End: June 4, 2018



Contact Information

Should you have any questions, you may contact the following:

  • Land Agent Steve Vogl: (281) 895-5306
  • Coordinator of Maintenance James Sanders: (361) 994-4502
  • Chief Inspector John Ladner: (409) 291-2069
  • Supervisor of Operations: Randy Mitchell: (979) 541-4703