Petroline

The Petroline, formally the East-West Crude Oil Pipeline, is Saudi Arabia's 1,200-kilometre overland crude oil pipeline running from the Eastern Province oilfields to the Red Sea port of Yanbu. On 12 April 2026, two days after the US Hormuz blockade began, Petroline was restored to its full design capacity of 7 million Barrels Per Day, roughly half of Saudi Arabia's total export capacity, following engineering work that had kept it below peak throughput. The restoration immediately gave Riyadh an export route that entirely bypasses the Strait of Hormuz.

Petroline was built by Saudi Aramco and commissioned in 1981, originally as a wartime hedge during the Iran-Iraq War when Hormuz tanker traffic came under fire. It was expanded to its current 7 mbpd capacity in subsequent decades. The pipeline has an emergency pumping capacity that, under surge conditions, can handle additional throughput. A parallel products pipeline, the IPSA Petroline, runs nearby. The April 2026 restoration changed the strategic calculus around the Hormuz blockade: Saudi Arabia can sustain the bulk of its crude exports through Yanbu and the Red Sea route even if Hormuz remains closed.

Petroline's historical function as the original Hormuz bypass, designed during the 1981 Tanker War period, is the direct precedent for the ADCOP-Fujairah system UAE built along the same logic. The parallel between Petroline's role in 1981 and ADCOP's role in 2026 is structurally exact: both were built as insurance against Hormuz interdiction, and both have been called into full operation by the same threat pattern .

The critical vulnerability for Petroline as a 2026 Hormuz substitute is the Bab al-Mandeb Strait, where Ansar Allah retains threat capability against Red Sea shipping. Crude exported via Yanbu still traverses the Red Sea before reaching European or Asian markets. Analysts including Mona Yacoubian at CSIS warned during the April 2026 Hormuz escalation that Houthi engagement on Red Sea shipping remained a real risk, pointing to the limits of Petroline as a complete substitute . The CENTCOM redirection count of 52 by 7 May reflects both Hormuz closures and operators' calculation of Red Sea versus Cape routes.