Reactor Vessels Suppliers, Saudi Arabia

What reactor vessels do Saudi refineries and petrochemical plants use?

Saudi plants use hydroprocessing reactors for desulphurisation and hydrocracking, catalytic reforming reactors, fixed bed reactors in gas and sulphur units and jacketed reactors in chemicals. Refinery reactors are part of refinery equipment for Saudi plants, and the Kingdom is a large buyer because of its refining and petrochemical build-out.

Ras Tanura is reported to have a 50,000 bpd hydrocracker and 270,000 bpd of catalytic reforming equipment, and SATORP at Jubail lists two distillate hydrocracker units and a delayed coker. Each hydrocracker is built around reactors that hold catalyst beds under hydrogen, and each reforming unit around radial or axial flow reactors. Chemical plants in Jubail and Yanbu add stirred and fixed bed reactors for products from solvents to polymers.

The rest of the unit connects to the reactor. Feed is heated in heat exchangers for refineries, effluent goes to distillation columns, and the upstream crude passes desalting equipment. The companion page for general vessels is pressure vessel fabrication in Saudi Arabia, and cracking vessels are listed under catalytic cracking equipment.

Why does hydrogen service change the materials of a reactor?

At high temperature and hydrogen pressure, carbon steel can undergo chemical and metallurgical changes, so hydroprocessing reactors use chromium-molybdenum steel, usually with a stainless overlay inside. Grade, thickness and welding method follow the owner's materials specification and the licensor.

• Cr-Mo steel: according to Inspectioneering, alloy steels containing chromium and molybdenum can be used under such conditions, and the Nelson curves present operating limits for temperature and hydrogen partial pressure.
• Hydrogen attack: high temperature hydrogen attack is a known risk, with a threshold of at least 204 C quoted for dry conditions, and predicting limits is difficult because of uncertain inputs. Engineers rely on API RP 941 and operating experience, and confirm the current edition with the owner.
• Overlay: ferritic and austenitic stainless overlay and cladding are described as effective against hydrogen attack.
• Sour feed: Saudi crude and gas carry sulphur, so reactor internals and downstream equipment face H2S, and materials follow the owner's sour service rules.
• Welding: thick alloy welds need qualified procedures, preheat and post weld heat treatment, and records that the owner can audit.

Which standards and approvals apply to reactor vessels in Saudi Arabia?

In Saudi Arabia, reactor vessels are designed to ASME rules in Aramco or joint venture specifications, supplied by registered vendors, and imports may fall under the SASO pressure equipment regulation. We checked these in October 2026.

Aramco says that registering and qualifying as a supplier does not guarantee future business, so qualification for a hydrogen service reactor must be confirmed for the specific material group. QIMA reported that the SASO regulation was first available only in Arabic. For imports, read our SASO and SABER guide for industrial equipment.

Who supplies reactor vessels in Saudi Arabia?

Heavy hydroprocessing reactors are usually imported from large international fabricators and delivered to Saudi ports, while mid-size and agitated reactors can be built in the Kingdom by shops in Dammam, Jubail and Yanbu. Buyers often work with the EPC contractor and licensor to qualify makers before tender.

Reactor vessels are made to order against a licensor package, so buyers compare technical proposals and fabrication history, not catalogue items. Witnessing is done through third-party inspection agencies, and field closure welding through welding services providers. To receive offers, post your requirement with the data sheet and specification.

What affects the price and delivery time of a reactor vessel in Saudi Arabia?

Weight, alloy and wall thickness make up most of the price, while forging supply, overlay, heat treatment and shipping set delivery. ListGCC does not publish prices, which follow steel, alloy and freight markets.

• Plate and forgings: thick Cr-Mo material comes from a few mills.
• Internals: catalyst supports and distributors are proprietary and ordered from approved sources.
• Vendor qualification: a shop approved for drums is not automatically approved for heavy wall reactors.
• Transport: large reactors travel by heavy-lift vessel to Jubail, Dammam or Yanbu, then by road or barge, with permits and lifting plans.
• Turnaround timing: replacement reactors are tied to planned shutdown dates, which may be years apart.

How are reactor vessels inspected and kept in service in Saudi Arabia?

Reactors are inspected at planned shutdowns, when catalyst is unloaded and inspectors enter the vessel to check internals, the overlay and welds. The inspection plan is written at the design stage, because access, nozzles and instrumentation have to be placed where inspectors and tools can reach them.

Typical checks cover the stainless overlay for cracking or disbonding, the shell welds, the catalyst support grid, distribution trays and thermocouple connections. Temperature records during operation, including start-up and cooling rates, are kept because thick alloy walls are sensitive to thermal shock. Repairs to a hydrogen service reactor need qualified procedures and records that the owner accepts, so a repair shop must show experience in the same material group.

• Ask the designer for manway sizes and platform access that allow bed removal and entry.
• Keep fabrication records, material certificates and weld maps with the vessel for the life of the plant.
• Plan catalyst handling, inert entry and waste disposal with the licensor and the owner.

What should a Saudi buyer compare in reactor proposals?

Compare the fabricator's record on vessels of the same material and thickness, then the schedule and the split of scope. A low bid from a shop without thick alloy experience often turns into late delivery and rework.

• Ask for comparable reactors built, with year, thickness, material and service.
• Confirm forging and plate sources and whether they are approved by the owner.
• Check what is included: internals, overlay, heat treatment, coating, shipping and site supervision.
• Ask for the test and inspection plan, with hold points and the extent of NDE.
• Ask which scope is built in the Kingdom and which is imported, since this affects lead time and in-Kingdom content.

Sources

• Inspectioneering, steels for hydrogen service at elevated temperatures and pressures
• Offshore Technology, Ras Tanura refinery expansion
• NS Energy, SATORP refinery and petrochemical complex expansion
• Aramco, Become a supplier
• QIMA, SASO updates December 2022
• ASME, BPVC Section VIII Division 1