Williams Partners LP priced its public offering of $800 million of 4.85% senior notes due 2048 at 99.515% of par.

The partnership said Feb. 26 that it intends to use the net proceeds of the offering for general partnership purposes such as paying down debt and repaying its $750 million of 4.875% senior notes due 2024.

The large-cap natural gas infrastructure master limited partnership said it expects the offering to close March 5.

Citigroup, Morgan Stanley and Mitsubishi UFJ Financial Group are acting as joint book-running managers for the offering.