Key Takeaways:
- Saudi Arabia built the East-West Pipeline in the Iran–Iraq War as redundancy past Hormuz, moving crude from the Eastern Province to Yanbu on the Red Sea. A 10 September drone strike—Riyadh blames Iranian-backed militias in Iraq—forced a temporary shutdown. The piece says that hits about 4% of world oil supply. Rystad: as of late August, up to 4 million b/d on the line. Prior hits: Houthis at Afif (2019) and Iranian drones in the 2026 Iran war.
- Bypassing Hormuz shifts risk to Bab el-Mandeb. The author says Houthis now hold more ground around Perim, Hanish, Mocha, and Dhubab. Hormuz flows: 21.6 million b/d in Q4 2025 to 4.9 million in Q2 2026; Bab el-Mandeb 5.4 million to 8.1 million; Suez/SUMED ~5.8 million. Aramco’s 15% SUMED stake is a backup, but much of that still needs the pipeline and Yanbu; ship size and pipe capacity cannot swap every barrel.
- 2019: pipeline hit, Hormuz open. April 2026: Hormuz squeezed, Bab el-Mandeb less constrained. September 2026: pipeline, Hormuz, and Bab el-Mandeb under pressure at once. Author: alternatives that share the same nodes are not independent risk. Count independent capacity under simultaneous hits, not the number of maps on the wall.
Saudi Arabia built the East-West Pipeline during the Iran-Iraq War to reduce its exposure to a single chokepoint, serving as an alternative route to the Strait of Hormuz. In energy security and critical infrastructure protection, this is known as redundancy: maintaining alternative routes or infrastructure if the main system fails.
Four decades later, the pipeline has proven to be more than a mere alternative, it has become a critical artery for maintaining the Kingdom’s crude oil exports. But the latest drone strikes on the pipeline, which Saudi Arabia has attributed to Iranian-backed militias in Iraq, has forced its temporary closure. At the same time, the Houthis’ swift advancement towards Bab el-Mandab is further exposing the cracks in Saudi Arabia’s diversification plan. The pipeline was designed around substitutability, but questions now permeating analytical circles centre around simultaneity: can alternative routes remain resilient when several links in the network are disrupted at the same time?
Why Bypassing Hormuz Does Not Eliminate the Saudi Oil-Supply Risk
The East-West Pipeline was strategically built to restructure Saudi Arabia’s geography. Much of the Kingdom’s oil infrastructure is concentrated in its eastern region, stretching to Yanbu on the Red Sea, allowing it to bypass the Strait of Hormuz. Under stable conditions, Saudi Arabia enjoys considerable flexibility in redirecting crude oil exports to the Red Sea. Crucially however, the pipeline does not make Saudi oil immune to chokepoint risk. It merely moves the vulnerability further down the route and creates another dependency in the Bab el-Mandeb Strait.
This dependency has become particularly significant given that the Houthis have reached the strategic islands of Perim and Hanish and the coastal towns of Mocha and Dhubab, expanding their control around the Red Sea to Bab el-Mandeb.
Pressure on the infrastructure and maritime routes underpinning this alternative pathway, which connects Saudi Arabia’s eastern oil infrastructure to its Red Sea export terminals, poses a more fundamental question about the robustness of the Kingdom’s export network.
The bombing of the pipeline on 10 September threatens 4% of global oil supplies. The problem therefore becomes less about whether the pipeline can regain full capacity, but whether Saudi Arabia can reroute the crude oil now that its primary and backup routes are severely restricted.
The East-West Pipeline Is an Alternative, Not a Guarantee
The Pipeline’s importance to global oil flows is no secret. Rystad Energy estimates that as of late August, as much as four million barrels moved through it per day, with myriad analysts predicting that a prolonged outage, following the latest drone strikes, risks a “disastrous” loss of oil and threatens to remove Saudi crude oil from international markets.
But Saudi Arabia already knew the pipeline was vulnerable. After all, the 2019 Houthi Afif attack and Iranian drone strike during the 2026 Iran War both damaged the pipeline, forcing operations to be temporarily suspended.
The Kingdom’s redundancy model and oil export strategy were therefore not built on the assumption that the pipeline could never be attacked. Its primary purpose was to provide an alternative route to Hormuz, not to operate in isolation.
The geopolitical climate today is markedly different to that in 2019 and April 2026. In 2019, the pipeline was targeted, but its primary export route in Hormuz remained open. In April, Hormuz was effectively closed, but Bab el-Mandeb was not under the same physical constraint as it is today. As of September 2026, all three elements of Saudi Arabia’s export network are under simultaneous pressure: the pipeline, Hormuz and the Houthis establishing greater military presence around Bab el-Mandeb.
Saudi Arabia has learnt the hard way that an alternative route only provides meaningful redundancy if it remains available when the primary route fails. Today, the pipeline is being disrupted at precisely the moment when its alternative function is most valuable.
Saudi Arabia’s Alternative Oil Routes Are Not Independent from Each Other
The resilience of Saudi Arabia’s redundancy strategy depends on whether it can absorb a disruption to the pipeline by relying on contingency plans. To this end, Saudi Aramco’s 2026 corporate presentation identified the SUMED/Suez route as an alternative export pathway, noting Aramco’s 15% stake in SUMED.
As reassuring as this may sound however, having multiple export routes does not necessarily mean having multiple independent pathways to those routes. Saudi Arabia may have several destinations for its crude, but some of those routes still depend on the same upstream infrastructure, such as the East-West Pipeline and Yanbu.
In fact, data about oil flow changes in the region highlights the tension between Saudi Arabia’s redundancy and resilience.
As traffic through Hormuz fell from 21.6 million barrels per day in Q4 2025 to 4.9 million in Q2 2026, Saudi Arabia increasingly turned to its western export network. Flows through the Suez Canal and SUMED pipeline generally remained stable at approximately 5.8 million barrels per day in Q2, while flows through Bab el-Mandeb increased from 5.4 million barrels per day to 8.1 million in the same period.
The figures highlight a notable deficiency in Saudi Arabia’s redundancy model; that its alternative routes are not entirely independent. While the Suez/SUMED route remained a functioning alternative, the Kingdom’s ability to make use of it depended partly on its ability to move crude to the Red Sea. The East-West Pipeline and Yanbu were critical nodes enabling the flexibility of movement at scale.
This is in addition to the logistical issue that the Suez/SUMED contingency option cannot simply replace every barrel that would otherwise travel through Bab el-Mandeb. There would be several operational challenges such as vessel size and pipeline capacity.
The current crisis is therefore testing more than whether Saudi Arabia has a backup. It is testing whether that backup can continue to provide resilience when the wider network around it is under simultaneous pressure.
Diversified Oil-Export Routes Do Not Equate to Diversified Risk
Saudi Arabia’s redundancy model wholly achieved its aim of providing alternative oil flow options. The lesson from the current crisis is not that Saudi Arabia lacks alternatives, however. It is that alternative routes can still share the same vulnerabilities. That is what is currently being stress-tested with the drone strikes on the East-West Pipeline, restrictions to the Strait of Hormuz and Houthi advancements in Bab el-Mandab Strait all occurring simultaneously.
The age-old adage “quality over quantity” is particularly pertinent here. The Kingdom’s energy security does not merely depend on the number of alternative oil flow routes it possesses, but on whether these routes possess sufficient independent capacity when multiple routes are impaired.
