Maintenance of DOT-4L and TC-4LM liquid cylinders requires periodic evacuation of the annular space. Internal heating of the cylinder is a common practice in this evacuation process. TB-30 provides guidelines regarding the maximum heating temperatures for these cylinders during maintenance.

CGA TB-30
Original price was: $187.00.$93.00Current price is: $93.00.
Embrittlement Due to Overheating of DOT-4L and TC-4LM Liquid Cylinders
Compressed Gas Association , 04/04/2008