9 Questions about Cryogenic System Design
July 25, 2008
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Understanding the basic properties of liquid nitrogen
and the fundamentals of cryogenic pipe design can help plant engineers specify
distribution systems that comply with safety protocols, meet user expectations
and maximize efficiency.
Provide the answers to these nine questions about your cryogenic application to any supplier from which you are requesting a quote. Thoroughly considering your application before contacting the supplier can help you understand your needs and how a supplier can best satisfy them.
During extended periods of nonuse, the liquid nitrogen inside a pipeline
eventually will warm and turn into gas, and this gas will “push back” to the
bulk tank. Using an inline venting device will keep the line wetted with liquid
nitrogen.
Provide the answers to these nine questions about your cryogenic application to any supplier from which you are requesting a quote. Thoroughly considering your application before contacting the supplier can help you understand your needs and how a supplier can best satisfy them.
- What is the application?
- What is the pressure requirement for liquid nitrogen?
- How frequently will the liquid nitrogen be used?
- How much two-phase flow (mixture of liquid and gas) can be tolerated?
- What will be the peak demand for liquid nitrogen?
- Is there a preference for bendable vacuum-jacketed pipe or rigid
vacuum-jacketed pipe?
- Is a bulk tank or other source already available or will one need to
be installed?
- What is the timeframe for the project?
- Who will be responsible for installation, including tool hookups?
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