Hydrostatic Test Engineering

Hydrostatic testing of in-situ pipelines is one of six methods under PHMSA’s Mega Rule to validate or establish the maximum allowable operating pressure of pipelines that have never been hydrostatically tested or have missing or incomplete records. In addition to developing strength test programs for individual clients, GTS can scope, design, and manage hydrostatic test projects and has done so for thousands of miles of lines for operators across the country.

GTS’ focus within any strength test program is to introduce methods and procedures to accomplish strength test goals and establish traceable, verifiable, and complete records. In addition to engineering design, our services include project management and engineering field support throughout project execution. Construction completion does not mean project completion! Our GTS team performs as-built quality checks during construction and upon project completion to ensure all required traceable, verifiable, complete and reliable asset knowledge is provided to support operator’s system of record.

Please refer to our “Key Projects” section below for various project examples that highlight GTS’ hydrostatic test engineering expertise.

Additional Services

Key Projects

Long Line Hydrostatic Test

GTS provided hydrostatic test engineering and design for 160 miles of 34-inch gas transmission pipeline within the Mojave Desert. The project scope was to verify the integrity of the 1950’s vintage pipeline and validate MAOP. Since project initiation, GTS has been involved with all aspects of design and test coordination and GTS engineers will be providing engineering support to the owner’s engineer and construction contractor throughout construction and close-out. GTS created complete design packages that include: detailed engineering drawings, pipeline isolation and civil details, details for twelve 34-inch mainline valve installations with pneumatic actuation… Read More

Cordelia Valve Lot Relocation

GTS provided engineering and project management services for the Cordelia Valve Lot Relocation project. The project was completed in preparation for the widening of Highway 80 & Highway 680 Interchange in the City of Fairfield, CA. GTS coordinated with all regulatory agencies, adjacent utility operators, and private landowners from project inception thru project closeout. Project highlights included the installation of one (1) 32-inch pig launcher and one (1) 24-inch pig receiver at the relocated valve lot, installation of two parallel HDD installations (approximately 800 feet), and two parallel micro-tunnel bores (approximately 375 feet).

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