DUBAI - Pakistan is tapping its existing three-tranche U.S. dollar-denominated bonds sold in March, a document showed on Tuesday, reopening its first international bond sale since late 2017 that raised $2.5 billion.

Pakistan gave initial price guidance of 6%-6.125% for a tranche due in 2026, around 7.375% for bonds maturing in 2031 and around 8.75% for paper due in 2051, the document from one of the banks on the deal showed.

Credit Suisse , Deutsche Bank , Emirates NBD Capital , JPMorgan and Standard Chartered are arranging the deal, which is expected to launch later on Tuesday.

The March transaction's five-year tranche launched at 6%, the 10-year paper at 7.375% and 30-year notes at 8.875%.

(Reporting by Yousef Saba; Editing by Alex Richardson) ((Yousef.Saba@thomsonreuters.com; +971562166204; https://twitter.com/YousefSaba))