What aspect of Cryostop™ freeze plug makes pipe defects a concern?

Numerous scientific studies have proven that frozen pipes break when ice is uncontrollably formed inside the pipe near to a dead-end or closed valve. As the ice forms, it seals off the pipe I.D., and then expands longitudinally, along the center axis of the pipe, pushing on the trapped water. This push causes the pressure to rise in the entrapped unfrozen water area until it reaches a level that the pipe can no longer hold.

The pipe then sometimes breaks. Highly involved testing has shown that radial expansion of the ice plug does not come close to exerting enough stress on normal piping systems to cause failure. So why won't Cryostop International's process cause an expansion break?

CRYOSTOP International doesn't freeze plug up against a dead-end and if necessary we install pressure relief equipment to monitor and control the internal ... more.

Although Cryostop™ freeze plugs may temporarily increase the tensile and yield strength of your pipe by as much as 100%, the pipe is quite brittle inside the Cryostop™ freeze chamber during the procedure. If your pipe is damaged enough so that it's just about to fail at room temperature, while its being worked on there is an unknown degree of hazard. More.

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