UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): March 18, 2013

ENTERPRISE PRODUCTS PARTNERS L.P.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (713) 381-6500

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

Item 1.01 Entry into a Material Definitive Agreement.

On March 18, 2013, Enterprise Products Partners L.P. (the “Partnership”), Enterprise Products OLPGP, Inc. (“EPOGP”) and Enterprise Products Operating LLC (“EPO”) completed the public offering of $1.25 billion aggregate principal amount of EPO’s 3.35% Senior Notes HH due March 2023 (the “2023 Notes”) and $1.00 billion aggregate principal amount of EPO’s 4.85% Senior Notes II due March 2044 (the “2044 Notes” and, together with the 2023 Notes, the “Notes”). Pursuant to the indentures described below, the Notes are guaranteed on an unsecured and unsubordinated basis by the Partnership (the “Guarantee,” and together with the Notes, the “Securities”).

The offering of the Securities has been registered under the Securities Act of 1933, as amended (the “Securities Act”), pursuant to a Registration Statement on Form S-3 (Registration Nos. 333-168049 and 333-168049-01) (the “Registration Statement”), as supplemented by the Prospectus Supplement dated March 11, 2013 relating to the Securities, filed with the Securities and Exchange Commission (the “Commission”) on March 12, 2013, pursuant to Rule 424(b) of the Securities Act (together with the accompanying prospectus dated November 29, 2010, the “Prospectus”).

The Securities were issued under an Indenture, dated as of October 4, 2004, among EPO (as successor to Enterprise Products Operating L.P.), as issuer, the Partnership, as guarantor, and Wells Fargo Bank, N.A., as trustee, (collectively, as amended and supplemented by the Tenth Supplemental Indenture, dated as of June 30, 2007, providing for EPO as successor issuer, the “Base Indenture”), as amended and supplemented by the Twenty-Fourth Supplemental Indenture dated as of March 18, 2013 (the “Supplemental Indenture,” and together with the Base Indenture, the “Indenture”).

The Notes provide that interest will accrue from March 18, 2013 at a rate of 3.35% per annum for the 2023 Notes and 4.85% per annum for the 2044 Notes. Interest on the Notes will be payable on March 15 and September 15 of each year, commencing September 15, 2013. The 2023 Notes mature on March 15, 2023 and the 2044 Notes mature on March 15, 2044. The Notes also provide that at any time prior to December 15, 2022 (three months prior to their maturity date) for the 2023 Notes and September 15, 2043 (six months prior to their maturity date) for the 2044 Notes, EPO may redeem some or all of the Notes at the applicable redemption price that includes accrued and unpaid interest and a make-whole premium. At any time on or after December 15, 2022 for the 2023 Notes and September 15, 2043 for the 2044 Notes, EPO may redeem some or all of the Notes at an applicable redemption price equal to the principal amount of the Notes to be redeemed, plus accrued and unpaid interest.

The terms of the Securities and the Supplemental Indenture are further described in the Prospectus under the captions “Description of the Notes” and “Description of Debt Securities,” which descriptions are incorporated herein by reference to Exhibit 99.2 to the Partnership’s Current Report on Form 8-K filed with the Commission on March 13, 2013. Such descriptions do not purport to be complete and are qualified by reference to the Base Indenture and to the Supplemental Indenture, which is filed as Exhibit 4.3 hereto and incorporated herein by reference.

Item 8.01 Other Events.

Certain legal opinions related to the Registration Statement are filed herewith as Exhibit 5.1.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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EXHIBIT INDEX