Glycol vs Cryotec CF7
Cryotech CF7® is safe for the environment - it does not contain glycols or urea and has minimal impact on storm water discharges.
Testing shows CF7 biodegrades quickly at low temperatures and has a low biological oxygen demand (BOD) and chemical oxygen demand (COD).
Toxicity tests rate CF7 as relatively harmless to aquatic life. "Relatively harmless" is commonly used by the environmental community and is the most favorable classifciation on the U.S. Fish and Wildlife scale. Cryotech will provide detailed environmental test numbers upon request.
CF7 does not contain hazardous components and is designated as non-hazardous by the U.S. Department of Transportation.
Carbon Steel Low Temperature Toughness
The lower temperature limits / toughness of carbon steel has been questioned and investigation continues. Due to the request for further investigation an ASME joint task group (Section II and Section VIII) was created to continue to review available research and associated data.
One line of thinking may be to modify the impact curve category for any material that the data shows to warrant any action. Currently evidence is not sufficiently conclusive to take action with the exception of A105 (not normalized) material. It has been discussed that A105 (not normalized) may be placed in curve A.
Piping and structural components fabricated out of the country and shipped to Canada for final welding and assemble were found to contain lead based paint. In Canada lead-based paint has not been permitted for almost 3 decades due to the serious health risks associated.
Lead poisoning can cause anemia as well as brain and nervous system damage and currently there is no known safe level of lead exposure but certainly there are methods to reduce the risk of lead poisoning - the appropriate subject matter expert should be consulted.