June 1 (Reuters) - U.S. oil refiners expect to have 464,000 barrels per day (bpd) of capacity offline in the week ending June 1, down from 633,000 bpd the week before, data from research company IIR showed on Friday. The firm expects offline capacity to fall to 403,000 bpd in the week ending June 8 and to 312,000 bpd the week after that. Here are IIR weekly figures (in thousand bpd): Week Ending Fri Cap Offline 06/15/2012 312 06/08/2012