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The petrochemical industry transforms crude oil and natural gas into fuels and chemical products through complex chemical and physical processes. Pressure vessels are fundamental to this system, enabling critical functions such as reaction, separation, heat exchange, and storage. They form the backbone of safe and efficient plant operation.
Here are selected project cases demonstrating our capability in delivering pressure vessels for complex petrochemical units.
| Client | Equipment Name | Spec | Weight / Material |
|---|---|---|---|
| Hengyi (Brunei) | Reactor / Scrubber Tower | φ6600 × 56 × 40209 mm | 302.7T (Shell Structure) Material Sections: Φ4000×3+20 / Φ5038×6+28 / Φ5450×24 / Φ3650×16×70328mm |
| Hengyi (Brunei) | Gasifier | Φ13360 × 36 × 24722 mm | 430T Q345R |
| Hengyi (Brunei) | Heater | Φ9365 × 28 / Φ4330 × 20 × 35679 mm | 280T Q345R |
| Yantai Yida New Materials Co., Ltd. | Coke Drum | φ6600 × 56 × 40209 mm | 350T 14Cr1MoR |
| Liaoning Bora Bioenergy Co., Ltd. | Coke Drum | φ6600 × 36/38/42/52/64 × 47600 mm | 375T 14Cr1MoR |
| Shandong Yida New Materials Co., Ltd. | Coke Drum | Φ6100 × 58/52/48/42 × 33533 mm | 278.4T 15Cr1MoR |
| Hebei Xinji Chemical Group Co., Ltd. | Gasifier Shell | φ2700 / φ2690 × 50 / (50+5) × 14191 mm | 76T 15CrMoR; 15CrMoR + S31603 (Stainless Cladding) |
| Hengli Petrochemical | MTO Reactor | φ7925 / φ5000 × δ63 / 123 / 80 / 46 × 43467 mm Quantity: 1 Unit | SA516 Gr70 |
| Yichang Xingxing Lantian Technology Co., Ltd. | Primary Shift Converter | Φ3200 × 15850 mm | 150T 14Cr1MoR |
| Yichang Xingxing Lantian Technology Co., Ltd. | Secondary Shift Converter | Φ3200 × 14570 mm | 169T 15CrMoR |
| Ningxia Baofeng Energy Group Co., Ltd. | Waste Heat Boiler | 143-E102 φ2600×60/80×19500 mm | 188.8T Q345R Pressure Vessel Steel |
Pressure vessels are widely deployed across major units in petrochemical plants. Each vessel is customized for its operating environment, fluid characteristics, and pressure-temperature conditions.
| Process Unit | Pressure Vessel Application |
|---|---|
| Crude Oil Distillation | Desalters, Flash Drums, Atmospheric/Vacuum Tower Bottoms |
| Catalytic Cracking (FCC) | Strippers, Fractionator Bottom Drums, Steam Drums |
| Hydroprocessing (HDS/HCU) | Hydrocracking Reactors, HP Separators, Recycle Drums |
| Delayed Coking (DCU) | Coke Drums, Vapour-Liquid Separators |
| Olefins (MTO/MTP/Steam Cracking) | MTO Reactors, Quench Separators, Three-Phase Separators |
| Sulfur Recovery (Claus) | Claus Reactors, Sulfur Condensers, Reheaters |
| Gas Treatment & Purification | Amine Absorbers, Regenerators, Knockout Drums |
| Product Storage & Logistics | Spherical LPG Tanks, Vertical Diesel/Gasoline Storage Tanks |
Each pressure vessel serves a distinct role depending on its integration point in the process. Functional categories include:
| Function | Description | Typical Equipment |
|---|---|---|
| Reactors | Drive chemical transformation under severe conditions | Hydrocracking Reactor, Claus Furnace |
| Separators | Physically divide gas/liquid/solid phases | HP Separator, Flash Drum, 3-Phase Drum |
| Heat Exchangers | Transfer thermal energy to improve process efficiency | Shell & Tube Exchangers, Condensers |
| Storage Tanks | Temporarily hold gases or liquids under pressure | Spherical Tank, Horizontal Tank |
| Buffer/Surge Vessels | Stabilize flow and pressure variations | Surge Drum, Recycle Gas Drum |
Pressure vessels in petrochemical applications must be structurally adapted to space, process, and mechanical requirements.
| Structure Type | Description | Typical Use |
|---|---|---|
| Horizontal Cylindrical | Most common; robust and cost-effective | Reactors, Separators |
| Vertical Tower | Space-saving, ideal for separation towers | Distillation Column, Absorber |
| Spherical Tank | Ideal for high-pressure storage with uniform stress | LPG, LNG, Butadiene Storage |
| Modular Skid-Mounted | Preassembled, reduces site construction time | Packaged Units for Offshore or Remote Use |
Petrochemical media often contain hydrogen, H₂S, chlorides, CO₂, and other corrosive agents. Material selection must ensure safety, integrity, and long-term performance.
| Material | Key Properties | Application Area |
|---|---|---|
| 12Cr2Mo1R / 15CrMoR | High-temperature, high-pressure resistance | Reactors, High-Pressure Drums |
| Q345R / 16MnR | General carbon steel | Low-pressure separators, storage vessels |
| 304 / 316L Stainless Steel | Excellent acid and chloride resistance | Amine towers, H₂S gas treatment |
| Duplex Steel (2205/2507) | Strong + chloride stress corrosion resistance | Wet sour gas, marine or acidic service |
| Inconel / Hastelloy | Premium alloys for extreme corrosion | Sulfur recovery units, Claus furnaces |
Pressure vessels for petrochemical plants must meet the most stringent global codes and undergo rigorous quality assurance procedures.
| Standard/Code | Description |
|---|---|
| ASME Section VIII Div.1/2 | Global code for pressure vessel design and fabrication |
| GB150 / GB151 | Chinese national code for vessels and heat exchangers |
| API 510 / API 579 | In-service inspection and fitness-for-service |
| API 650 / API 620 | Welded storage tank standards |
| NACE MR0175 / ISO15156 | Materials for H₂S environments and sour gas service |
Quality Control Includes:
Petrochemical environments present extreme technical challenges. We meet them with proven engineering expertise and advanced fabrication capabilities.
| Challenge | Engineering Solution |
|---|---|
| Ultra-thick wall welding (>200mm) | SAW + multi-layer preheat, 100% RT, post-weld heat treatment |
| Hydrogen service corrosion | HIC-resistant alloys + overlay welds |
| Sour gas cracking (H₂S/Cl⁻) | NACE-compliant materials + dual-layer cladding |
| Transport & erection of large vessels | Modular fabrication + section-by-section transport |
| Life-cycle reliability | API 579 FFS assessment + digital monitoring systems |
As the petrochemical sector embraces decarbonization and digitalization, pressure vessels are also evolving toward smarter, greener, and more integrated systems.
| Trend | Description |
|---|---|
| Modularization | Factory-assembled units to reduce site construction |
| IoT-Enabled Monitoring | Real-time performance tracking and predictive maintenance |
| Green Manufacturing | Low-carbon steel, reduced welding emissions |
| Localization & Substitution | Domestic production of large critical reactors |
| Functional Integration | Multi-process vessels (reaction + separation + heating) |
Pressure vessels are indispensable to the petrochemical industry, providing structural integrity and process reliability under the most demanding conditions—high pressure, high temperature, and corrosive environments. From hydrocracking reactors to sulfur recovery drums, these vessels serve as the backbone of complex chemical conversions and energy transformations.
As the industry moves toward cleaner fuels, digitalization, and higher safety standards, pressure vessel technology must continue to evolve—embracing smarter monitoring, modular fabrication, and sustainable materials. With deep engineering expertise, advanced manufacturing capabilities, and a commitment to global quality standards, we are proud to deliver pressure vessel solutions that empower the future of petrochemicals.
If your project involves pressure vessel design, selection, or turnkey delivery, our expert team is ready to support with end-to-end solutions tailored to your operational needs.
Why Choose Us?
Certified Safety, Reliable Quality, Custom-Engineered Pressure Vessels.
Weihai Shidao Heavy Industry Co., Ltd is a leading manufacturer of heavy equipment specializing in nuclear power components & large pressure vessels.
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