COLD RING ALSO KNOWN AS ROUNDING CLAMP OR LOCKING PLIERS FOR SOCKET FUSION PIPE PROCEDURE
According to the ASTM American Standard, the Cold ring or rounding clamp is a device that is clamped around the pipe to round the pipe and limit the distance the pipe end goes into the pipe heater face and the socket fitting and maintain flattened melt bead.
- Round the pipe
- Limit the distance the pipe end goes into the fitting
- Flatten the melted bead
CLAMPED AROUND PIPE 
CONTROL DEPTH OF PIPE INSERTION 
FLATTENED MELT BEAD
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