Grayloc Technology

We deliver industry-leading solutions for connecting critical service piping and vessel systems.

The Oceaneering® Grayloc® metal-to-metal bore seal technology has been developed and incorporated into products ranging from the original Grayloc clamp connector to advanced connection systems.

  • Field-proven performance since the invention of the Grayloc clamp connector in 1951

  • Regional engineering, manufacturing, and sales facilities offer worldwide product and project support

  • CheckMark 01

    Fully-accredited ASME/ISO quality management systems provide 100% traceability of all components

Grayloc connections enable design optimization, cost efficiency, and reduced installation and maintenance times.

  • Reduced maintenance with leak-free, field-proven design
  • Conserves space and reduces weight with compact footprint
  • Faster installation, assembly, and disassembly
  • Incorporates easily serviceable and reusable components
  • Minimizes spare parts inventory

Our products are suitable for use in extreme service conditions.

  • Vibration: 80 to 200 cycles per second under 6,600 psi
  • High temperature: Service experience to 1,700 °F  (926 °C)
  • Low temperature: Routine liquefied gas service, including liquid hydrogen and nitrogen, to -425 °F (-254 °C)
  • Thermal shock: Routine service with temperature changes up to 300 °F (149 °C) per hour
  • Corrosion: Liquid sodium service at 1,200 °F (649 °C)
  • Leak rate: 10-6 atm cc/s helium
  • Pressure: Full vacuum to 60,000 psi
Our standard Grayloc product lines include clamp connectors, compact flanges, closure systems, and remote connectors. A full suite of piping components that complement these technologies is available, ranging from threaded fittings, crossover components, and integrated pipe fittings, to metering solutions, ball joints, and check valves. 

Grayloc connectors are used for critical service piping and vessel connections in a variety of industries and applications.

  • Oil&Gas

    Oil and Gas Production

  • Factory Dk 01


  • ChemicalPlanht 01

    Chemical Processing

  • Nuclear Dkblue 01

    Power Generation

  • Aerospace

  • Synthetic Fuels Processing

  • Coal 01

    Coal Gasification and Liquefaction

  • Foodprocessing Dkblue 01

    Food Processing

  • Envrionmental



Product and Project Support

We provide worldwide product and project support from our global engineering, manufacturing, and sales locations. 
  • Engineering 01

    Engineering Analysis and Design

  • EngineeringSupervision 01

    Project Management Services

  • Inspection and Repair/Rework

  • Assembly and Maintenance Support and Training

Contact Us | Grayloc Technology

Company page Since our founding in the early 1960s, Oceaneering has expanded and grown globally to service several industries such as the offshore energy industry, defense, entertainment, material handling, aerospace, science, and renewable energy industries. In 1964, Mike Hughes and Johnny Johnson formed a Gulf of Mexico diving company called World Wide Divers. The company grew in response to increasing demand for their services and in 1969 merged with two other diving companies to form Oceaneering International, Inc. To solve the toughest challenges, we do things differently, creatively, and smarter. As your trusted partner, our unmatched experience and truly innovative portfolio of technologies and solutions give us the flexibility to adapt and evolve, regardless of market conditions. Our mission is to solve the unsolvable. We thrive by creating industry-changing technically creative solutions for the most complex operational challenges under water, on land, and in space. Our five core values establish a common culture and demonstrate what is most important for us as a company. Since the beginning, the company has transformed from a small regional diving company into a global provider of engineered products and services. Today, we develop products and services for use throughout the lifecycle of an offshore oilfield, from drilling to decommissioning. We operate the world's premier fleet of work class ROVs. Additionally, we are a leader in offshore oilfield maintenance services, umbilicals, subsea hardware, and tooling. We also serve the aerospace, defense, and theme park industries. Underpinning everything we do, safety is not only the foundation of our core values, but it is vital to our unmatched performance record and company culture. The industries we serve are as diverse as they are complex. Whether we are engineering deepwater umbilicals or developing robotics for aerospace applications, the safety and health of our employees, vendors, and customers is an integral part of our day-to-day business. If we are working, then our responsibility is to be working safely. Since our inception in 1964, we have placed a high value on employee safety—from diving services and subsea inspection to vessel-based installation operations. We have and will continue to evolve not only our health, safety, and environmental (HSE) processes, but those of the industries in which we work. Although we have been fatality-free since 1999, our HSE journey goes beyond statistics. As our portfolio of services has grown, we have continued to prioritize and advance our approach to HSE.