Cryogenics
Solutions By Sector

Cryogenics

Cryogenics

The Spool Welding Robot for the Cryogenics sector

The cryogenics sector encompasses a range of applications including LNG storage, cryogenic pressure vessels, and piping systems. These applications operate at extremely low temperatures, typically around -196°C (-320°F). At such temperatures, many metals that are ductile at room temperature can become brittle, increasing the risk of cracking. Ensuring the integrity and reliability of welds in these conditions is critical to maintaining the safety and performance of cryogenic systems.

When welding for cryogenic applications, it is crucial to control heat input and achieve precise lateral expansion and Charpy V-notch values. These parameters are essential to avoid brittle microstructures and ensure the durability of the materials used. The cryogenics sector requires welds that can withstand extreme cold without compromising the integrity of the structure.

The Spool Welding Robot (SWR™) ensures high-quality welds while carefully controlling heat input, making it ideal for applications that operate at extremely low temperatures.

Suggested Solution

SWR-TIPTIG or SWR single torch with a minimum of three positioners

Welding Process
GMAW (MIG/MAG), GTAW (TIG), SAW
Pipe Materials
Stainless Steel (P8), Nickel (P9A, B, and C)
Industry Codes
ASME B31.3, ASME BPVC

Quality and Precision

The SWR™ provides precise control over the welding process, ensuring that heat input is maintained at optimal levels to achieve the required impact values for cryogenic applications. The SWR™ displays real-time heat input values on the HMI, offering immediate feedback during welding. Additionally, NovData™ captures all welding parameters every 50 milliseconds, ensuring thorough documentation and traceability. This high level of precision helps maintain weld integrity by preventing the formation of brittle microstructures that could lead to cracking. As a result, the SWR™ delivers reliable, high-quality welds that meet the stringent demands of the cryogenics sector.

We have exceeded the standard lateral expansion and Charpy impact values required for cryogenic applications. For example, the most common requirement is Charpy V-notch test results that meet or exceed 27J (20 ft·lbf) at -196°C (-320°F) and lateral expansion exceeding 15 mils (0.38 mm) at -196°C (-320°F).

Productivity Gains

In addition to ensuring weld quality, the SWR™ significantly boosts productivity making it possible to complete projects faster without compromising on quality. This is particularly beneficial for large-scale cryogenic projects such as LNG storage and pressure vessels, where both time and precision are of the essence.

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