Do I need to machine or prep the pipe ends before clamping?

The flange seats on standard pipe OD — no machine work required. Make sure mating surfaces are clean and free of debris. If pipes aren't perfectly round, clamp pressure may not seal evenly, so test-fit first.

What wrench size do I need to tighten this clamp?

Tightening hardware size is not specified in the product data. Check your clamp band bolt head before installation, or reference the manufacturer's documentation if included with your unit.

Can this clamp be reused if I disconnect it?

Yes. V-band clamps are designed for multiple connect-disconnect cycles. The band and flange don't wear out with normal use, so you can break it apart for service or maintenance without replacing it.