Shell Midstream Partners LP filed for an initial public offering that could be worth about $750 million before expenses and discounts.

Shell Midstream was formed by Royal Dutch Shell, and it will focus on acquiring pipelines and other midstream assets.

Shell Midstream’s assets include stakes in Zydeco Pipeline Co., Mars Oil Pipeline Co., and Bengal Pipeline Co., which all operate in Louisiana, Texas, and Mississippi. Mars also works in the Gulf of Mexico. The company also has a small stake in Colonial Pipeline Co., which owns pipelines running from Texas to the Northeast.

The master limited partnership filed for an offering of 37.5 million common units, and it expects the offering to price at $19 to $21 per unit. At the midpoint, that would be worth about $750 million. The underwriters of the IPO will have the option to buy another 5.6 million units. At $21 per unit, that could bring the gross proceeds to as much as $906 million.

If all of the units are sold, Royal Dutch Shell will still own about 69 percent of the partnership. The stock will be listed on the New York Stock Exchange under the ticker symbol “SHLX.” No specific timing for the IPO was announced.