Though many midstream outfits are structured as general partners and/or master limited partnerships, few companies give investors as many options to buy in as Kinder Morgan (KMI -0.30%).  El Paso Pipeline Partners (EPB) is one of two publicly facing master limited partnerships in the Kinder Morgan family. It's also one of the four investment vehicles attached to one of the midstream industry's most successful businesses. In this video, energy analyst Aimee Duffy takes a quick look at EPB, explaining how it works and where its money comes from, and why it might be right for your portfolio.