Don't assume anything. A row agreement should spell out the temp. construction row, the permament row, and show it all on a detailed plat.
Make sure it includes rules for abandonment of the ROW should the use of the pipeline should end, double ditching, timber damage, proper depth, etc...
There have been some good discussions on this site, read those. don't be rushed a pipeline row will be there a long time and can effect your property in many ways.