DESIGN
GUIDELINES
Cryogenic
vessels that are transported over public roads come under
the jurisdiction of the Hazardous Materials regulations of
the Department of Transportation. Under those regulations,
vessels that operate at less than 25 PSIG are exempt from
the requirements, and as such, are unregulated.
The ASME
Boiler and Pressure Vessel Code, as related to cryogenic vessels,
is usually invoked at the discretion of the customer, depending
upon the application.
In keeping
with good manufacturing practices (although not specifically
required) Cryofab designs and fabricates all pressurized portable
cryogenic vessels according to our Quality Control Program,
which includes the following:
Inner
Vessel Material:
ASME SA-240, type 304, Stainless Steel
Design
Guideline:
ASME Section VIII and or DOT, Specification 4L
Welding
Procedures:
Qualified in accordance with ASME, Section IX and or DOT
4L
Safety
Devices:
In accordance with CGA pamphlet S1.1, Paragraph 5.9.3, with
exceptions.
Jacket
Relief:
In accordance with CGA Pamphlet 341
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