Pressure Testing
Certified Testing for Safe, Compliant Pipeline Operation
At R.L. Coolsaet Construction, we provide professional pressure testing services to validate pipeline strength, identify defects, and verify operational limits. Whether for newly installed pipe, retrofitted systems, or compliance-driven testing, our team ensures your infrastructure meets all federal, state, and operator standards.
Our services include hydrostatic testing, nitrogen testing, and MAOP (Maximum Allowable Operating Pressure) verifications, all executed with safety, precision, and full regulatory documentation.
Hydrostatic Testing
Hydrostatic testing
Hydrostatic testing is the gold standard for confirming pipeline strength and leak tightness before commissioning or reactivation.
Pressure testing with water per DOT and PHMSA regulations
Performed on gas and product pipelines, station piping, and fabricated components
Includes filling, pressurization, hold testing, and dewatering
Thorough documentation of pressure logs, hold times, and environmental controls
Temporary test headers and manifolds fabricated as needed
We manage all logistics—water sourcing, pumping, disposal, and environmental mitigation—ensuring minimal impact and maximum compliance.
Nitrogen Testing
For systems where water is not suitable or dehydration is critical, nitrogen testing offers a clean, dry, and efficient alternative.
Ideal for pre-commissioning dry systems, complex fabrication, or cold weather conditions
Inert, non-corrosive testing method suitable for sensitive pipe coatings and valves
Pressure holds performed at required specifications
Leak detection using pressure decay or soap solution methods
Safe venting and gas handling performed by qualified crews
We partner with trusted nitrogen suppliers and deliver fully engineered solutions that protect your assets while confirming readiness for service.
Verifying a pipeline’s Maximum Allowable Operating Pressure (MAOP) is a critical step in compliance, especially for older assets or regulatory-driven reassessments.
Review of historical pressure records, design specs, and prior test data
In-field validation through pressure testing or material sampling (if needed)
Documentation to support PHMSA reporting and operator compliance programs
Tailored support for operators implementing MAOP Reconfirmation under Mega Rule guidelines
Whether you're responding to regulatory requirements or proactively managing risk, we provide MAOP verifications you can trust.
MAOP Verifications
Safety. Accuracy. Confidence in Every Test.
R.L. Coolsaet’s pressure testing team brings decades of experience in natural gas and liquid pipeline systems. We own state of the art digital pressure gauges and datalogging equipment to ensure accurate readings. All tests are conducted under strict QA/QC procedures, with safety as our top priority.
We’re equipped to support projects ranging from short test spools to multi-mile pipeline segments.
Why Choose R.L. Coolsaet for Pressure
Testing?
When you choose us, you’re choosing a partner with:
Proven Experience
We’ve installed thousands of miles of pipeline for some of the country’s leading energy providers. Our resume includes projects of all sizes, scopes, and complexity for almost ninety years
Self-Performing Crews
From earthwork and welding to testing and tie-ins — we do the work ourselves. This gives you tighter control over quality, cost, and schedule.
Commitment to Quality
Every weld, every trench, every joint is inspected and held to the highest standards. We don’t cut corners, because reliability matters.
Responsive & Reliable
We’re known for our ability to mobilize quickly, adapt to challenges, and keep projects moving forward. Our team works hard to earn your trust — and keep it.
Responsive & Reliable
We’re known for our ability to mobilize quickly, adapt to challenges, and keep projects moving forward. Our team works hard to earn your trust — and keep it.