Cryofab Experience

Cryofab is in the third decade of manufacturing "state of the art" cryogenic equipment including vacuum insulated vessels and piping. Experts in the design and fabrication of equipment for the ultimate cold fluid, liquid helium, Cryofab has the ability to custom manufacture high quality vacuum insulated piping systems including bayonets, elbows, tees, fees, crosses, valves and flexible hoses.

High Efficiency, Custom Designed System

We can work from your isometric layout to provide a system engineered for ease of installation as well as for optimum insulation efficiency. Engineered system layout drawings can be provided for customer approval prior to fabrication. Site survey consultants for system design can be provided.

Pipe runs are typically made to fit shipping dimensions. The customer has the choice of bayonet or field joint connections. Vacuum pump-out and relief assembly is provided on the outer of each pipe section. Pipe sections are created for ease of handling and protection in shipment.

Cryofab Quality

All Cryofab vacuum insulated piping and containers are designed, constructed and tested with the satisfaction of the customer in mind. Multi-layer insulation and getter materials are employed to maintain a high thermal efficiency for low heat leak. The annular space is evacuated at a pressure of 1x106 mm Hg. under 250°F heat and is tested with a helium mass spectrometer with 1x109 cc/sec sensitivity. Each vacuum insulated pipe section is inspected for conformance to our rigorous specifications before it can be released for shipment to the customer.

We can work from your isometric layout to provide a system engineered for ease of installation as well as for optimum insulation efficiency. By utilizing our experience with storage and handling of the ultra cold fluid, liquid helium, Cryofab has the ability to custom manufacture high quality vacuum insulated piping systems including bayonet assemblies, elbows, tees, crosses, valves and flexible hoses.

Pipe runs are typically made to fit shipping dimensions. The customer has the choice of bayonet or field joint connections. Vacuum pump-out and relief assembly is provided on the outer of each section. Multilayer insulation and getter materials are employed to maintain a high thermal efficiency for low heat leak.

The annular space is evacuated to a pressure of 1 x 10 (-6) mm hg. at 250°F and tested with a helium mass spectrometer. Each section is inspected for conformance to our rigorous specifications before it can be released for shipment to the customer.

Vacuum insulated piping systems are much more efficient than "foam-insulated pipe" or "dynamic vacuum" systems for both insulating capabilities and cost effective operation.

A comparison of heat input from a normal environment into a liquid nitrogen flow stream:

	Foam Insulated Pipe: 12 to 20 BTU/hr-ft or vaporizing up to 2.5 gallons/hr*
	Dynamic-vacuum Pipe: 2 to 4 BTU/hr-ft or vaporizing up to .5 gallons/hr*
	Cryofab Vacuum Insulated Pipe: 0.42 BTU/hr-ft or vaporizing up to .08 gallons/hr*

* Data based on 100 ft. of 1" inner with liquid nitrogen.

Cryofab Vacuum Insulated Pipe Specifications

All pipe sizes shown above are Type 304 Stainless Steel Sch 5 Pipe. "MAWP" is the maximum allowable working pressure of the inner pipe.