Could any one post a SOP for double red cell collection !!! It would really help..

or from where i could get the guide lines

Very good question, I wouldn't mind seeing this either!

I believe they are apheresis collections so I would assume the procedure would come from the instrument manufacturer.

Right, each manufacturer has their own SOP, format it to your template then you add the AABB standards, relative to the donor, regarding that Apheresis procedure. Then, you have to make sure that it is in fact how the procedure is being done, you can assign this to the operator. Then there is the training and competency and the documentation.