|
Hole Size Chart for Hot Dip Galvanizing |
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|
Tube Size |
Minimum Hole Size |
Hole Size When Multiple Dips |
|
1/2″ |
1/4″ |
3/8” |
|
3/4″ |
3/8″ |
1/2″ |
|
1” |
3/8″ |
1/2″ |
|
1 1/4″ |
1/2″ |
5/8” |
|
1 1/2″ |
1/2″ |
5/8” |
|
2” |
1/2″ |
3/4” |
|
3” |
3/4″ |
1” |
|
4” |
1” |
1.25” |
Holes should always be as close to the end of the pipe or tube as possible, and never more than 1” from the end.
