s/^(.*\|)*.*ABC\.pi=([\d.]+|[\w.]+)*.*ABC\.id=(\d+|[\w.]+).*$/$1$2
+|$3/s;
##</code><code>##

use strict;
use warnings;

while (<DATA>) {

   next unless /^\d+\|(\d+?)\|/ and $1 == 1;

        if (/(.+?)~.+?=(.+?)~.+=(.+?)$/) {  # note here
            print $1, $2, $3, $/;
        }
        else {
            print "Exception: ", $_, $/;
        }
}

__DATA__
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.66~ABC.id=789137136770
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.67~ABC.id=789134713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.68~ABC.id=789137213670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.69~ABC.id=78913713670
123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=78913713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=78913713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=789137135670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=789137153670
123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670
123|1|456464|645646|4546|654~abc~dhghga~121322~456466874~8796896
123|2|456464|645646|4546|654~abc~dhghga~121322~456466874~6788708
123|2|456464|645646|4546|654~abc~dhghga~121322~456466874~6806


##</code><code>##

123|1|456464|645646|4546|654112.33.44.55.66789137136770
123|1|456464|645646|4546|654112.33.44.55.67789134713670
123|1|456464|645646|4546|654112.33.44.55.68789137213670
123|1|456464|645646|4546|654112.33.44.55.6978913713670
Exception: 123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670

123|1|456464|645646|4546|654112.33.44.55.7078913713670
123|1|456464|645646|4546|654112.33.44.55.7078913713670
123|1|456464|645646|4546|654112.33.44.55.70789137135670
123|1|456464|645646|4546|654112.33.44.55.70789137153670
Exception: 123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670

Exception: 123|1|456464|645646|4546|654~abc~dhghga~121322~456466874~8796896