Once urgent repair needed to be done on large pipes,assemble some small range clamps to one several band repair clamp.
1.Make sure of the exact pipe O.D,which needed to be repaired.
2.Choose two or three small range clamps,make sure the sum of their range is equal to the O.D. of the pipe which you want to repair.
For example, when repairing a DN500 DI pipe, O.D. 510mm ,choose three DN150 clamps which range is 159-170 to make them be the right size for this DN500.
3.The small clamps you use to assemble to a big one is not necessary to be the same size,but it would be better to be the same.
