Keep Your Cylinders, Tanks, COPVs, and CPVs Certified, Safe, and Operational

Steelhead Composites provides comprehensive recertification services to extend the life of your composite and metal pressure vessels while ensuring compliance with DOT, ISO, and other regulatory standards. Our process includes detailed inspection, hydrostatic testing, and complete documentation—helping you avoid costly replacements and maintain operational readiness across diverse applications.

Steelhead’s Recertification Services Are Ideal For:

  • Type 1 (All-Metal), Type 2 (Hoop-Wrapped), Type 3 (Fully-Wrapped with Metal Liner), and Type 4 (Fully-Wrapped with Polymer Liner) Whether your vessels are used in SCBA, SCUBA, CNG, hydrogen, or industrial gas systems, we have the tools and expertise to recertify them to DOT-SP and other applicable standards.
  • Fleet Operators & OEMs We support periodic inspections and recertification programs for transit agencies, commercial fleets, and OEMs managing large inventories of pressure vessels.
Recor Test 4 Open Workstation at Steelhead Composites, used for pressure vessel recertification with hydrostatic testing, inspection, and certification.
Comprehensive Pressure Vessel Recertification Process

Pressure vessels are critical components in transportation, energy, safety, and recreation systems—and their continued use depends on strict compliance with safety and certification standards. Steelhead’s recertification services help you maintain compliance, minimize downtime, and maximize the return on your pressure vessel investments.

Assorted composite and metal pressure vessels prepared for visual inspection, showing variations in size, material, and condition before recertification.
Visual Inspection

Assessment of the vessel’s external condition for signs of wear, corrosion, impact damage, or delamination that could compromise safety or performance.

Close-up of a pressure vessel secured in Steelhead’s water jacket proof chamber, prepared for hydrostatic and non-destructive testing.
Ultrasonic & Non-Destructive Testing (NDT)

For composite and metal vessels, ultrasonic thickness gauging and other NDT methods are used to evaluate structural integrity without causing damage.

Technician loading a composite pressure vessel into a water jacket proof chamber for hydrostatic testing during recertification.
Hydrostatic Testing

Vessels are pressurized with water to confirm their ability to safely contain high-pressure gases, verifying burst strength and leak-tightness under load.

Engineer reviewing certification data on a laptop, ensuring complete documentation of test results, inspection reports, and compliance records.
Documentation & Certification

Complete documentation packages include test results, inspection reports, and updated certification labels—ensuring vessels are ready for continued service and regulatory audits.

Uses and Applications
High-pressure gas cylinder mounted on a commercial truck, illustrating DOT-SP recertification for safe transport and storage compliance.

DOT-SP Recertification

Recertification to maintain compliance with U.S. DOT Special Permits for high-pressure gas transport and storage.

Containerized bank of high-pressure gas vessels for hydrogen storage and delivery, requiring DOT-certified recertification for safe transport and use.

DOT-Certified Transport Vessels

Recertify stationary and mobile vessels used in hydrogen, CNG, and other industrial gas delivery systems.

Closeup of emergency breathing system with cylinders, valves, and tubing, highlighting SCBA recertification for safety and compliance in critical applications.

Paintball & SCBA Recertification

Maintain safety, reliability, and compliance for recreational paintball cylinders and emergency breathing systems.

Scuba diver underwater with breathing tank, illustrating SCUBA recertification to extend service life and ensure safety for diving, rescue, and marine research.

SCUBA Recertification

Extend service life and safety of underwater breathing tanks for diving, rescue, and marine research.

Compressed natural gas (CNG) cylinders mounted on a vehicle, illustrating the need for recertification to support safe fleet operation and compliance.

CNG Cylinder Recertification (Type 1, 3, 4)

Support transit, refuse, and delivery fleets operating compressed natural gas fuel storage systems.

City transit bus powered by compressed natural gas (CNG), representing fleet inspection programs that ensure long-term safety and regulatory compliance.

Periodic Fleet Inspections

Scheduled inspection programs for fleet operators to ensure long-term safety and regulatory compliance.

Certifications

DOT Hydrostatic Requalification (49 CFR 180.205)

Certified hydrostatic testing in compliance with U.S. Department of Transportation requirements for continued vessel service.

ISO & PED Inspection Protocols

Recertification processes follow internationally recognized ISO standards and the EU Pressure Equipment Directive (PED).

Comprehensive Documentation & Traceability

Detailed test reports, inspection records, and traceability documentation provided for full regulatory compliance.