The Cost of Failure in Chemical Plants
Downtime Risks and Financial Impact
In the chemical processing industry, unplanned equipment failure can result in millions of dollars in losses due to production halts, safety risks, and environmental hazards. Pumps play a critical role in fluid transport across all stages of chemical manufacturing. If they fail, operations grind to a halt. Therefore, selecting pumps that can withstand extreme environments is not just a maintenance decision—it’s a business imperative.
The Need for Pumps That Survive Extreme Conditions
Chemical plants operate under some of the harshest conditions imaginable—from cryogenic temperatures to corrosive acids and high-temperature fluids. To address these challenges, Yantai Longgang Pump Industry Co., Ltd. provides mature solutions for pumps in petrochemical equipment and offers key pumps for many domestic installations and applications, such as tens of millions of tons of oil refining and millions of tons of ethylene. With advanced engineering and customized configurations, Longgang pumps are built to survive where others fail.
Surviving Cryogenic Chaos: -163°C to -40°C
Challenges of Handling Liquefied Gases
Cryogenic fluids like ethylene and propane are highly volatile and prone to gasification. Transporting these substances requires pumps that can perform reliably at ultra-low temperatures without cavitation or mechanical failure.
LDT (VS6) Vertical Barrel Pump for Cryogenic Stability
The LDT vertical barrel pump is engineered specifically for cryogenic applications.
Dual-Casing Structure for Temperature Resistance
These series pumps are double casing, radial split, multi-stage centrifugal pumps. These series pumps are designed for easily evaporable media, usually buried underground, making them easy to maintain, efficient in cooling, and with a long service life.
Balance Drum to Control Axial Thrust
It can be equipped with a balance disc or balance drum to balance the axial forces. This feature ensures mechanical stability even during rapid temperature fluctuations.
Multi-Point Shaft Support to Prevent Rotor Deflection
A multi-point-support structure is employed, with bearing spans meeting the API610 standard. Shaft operates under rigid conditions to ensure the pump’s operating speed remains far below the first critical speed.
Application: Sinopec Tianjin Ethylene Feed Pump Upgrade
In ethylene units like Sinopec Tianjin’s facility, the LDT model has been deployed as an ethylene feed pump—proving its reliability under cryogenic chaos.
Battling Blazing Heat: Up to 450°C
Thermal Expansion and Bearing Seizure in High-Temp Fluids
High-temperature operations such as boiler feed systems face issues like thermal expansion, leading to shaft misalignment or bearing seizure. Standard pumps often fail under these conditions.
LZE (OH2) Centerline-Mounted Overhung Pump Solution
The LZE model is designed for high-temperature environments with a focus on structural stability and lubrication efficiency.
Double Volute Design for Radial Force Balance
The pump body outlet ≥ DN80 adopts a double volute hydraulic design, which greatly balances the radial force.
Oil Mist Lubrication System for High-Temperature Operation
Longgang’s oil mist lubrication ensures that bearings remain operational even under thermal stress.
API 682 Seal Compatibility for Safety Assurance
The sealing cavity size complies with API682 requirements, and various types of mechanical seals can be configured according to different working conditions.
Application: Boiler Feed Pump in Qingdao Maleic Anhydride Project
High-pressure self-balancing boiler feed water pump used in Qingdao Refinery Liquefied Gas Safety Improvement (maleic anhydride) project. The LZE model handled high-temperature liquids efficiently while maintaining safety standards.
Resisting Acidic and Alkaline Corrosion
Corrosive Fluids Damaging Impellers and Seals
Chemical processes involving sulfuric acid or caustic soda quickly degrade conventional materials used in centrifugal pumps. This leads to frequent replacements and increased downtime.
Longgang’s Proprietary Alloy Solutions for Harsh Chemicals
R&D-Based Material Innovation Against Sulfuric Acid Erosion
In addition to chemical pumps made of ordinary anti-corrosion materials, the company has successively developed special alloy material pumps such as anti-dilute sulfuric acid, hydrochloric acid, concentrated sulfuric acid, caustic soda, and other highly corrosive super-low carbon duplex stainless steel pumps.
Customized Wetted Parts for Process Compatibility
Longgang offers fully customized wetted parts tailored to specific process fluids—ensuring compatibility while extending service life significantly.
Why Longgang Engineering Excels in Harsh Environments
CFD-Optimized Hydraulic Design with ANSYS/WINCASTER
Advanced simulation tools like ANSYS are used by Longgang engineers to optimize flow paths within each centrifugal pump design—minimizing turbulence and maximizing efficiency.
Achieving 90.5% Efficiency in BB2 Pump Models
The independently developed BB2 efficient centrifugal pump is mainly used in crude oil transportation, coal chemical industry, natural gas processing.The verified hydraulic optimum efficiency point reaches 90.5%, which is 3.5% higher than the national first-level energy efficiency.
ISO 9906 Grade 1 Accuracy Verified by 30MPa Test Bench
Every pump undergoes rigorous performance testing using high-pressure test benches up to 30MPa—ensuring ISO Grade 1 accuracy before delivery.
Real-World Validation: CO₂ Booster Pumps in China’s Largest CCUS Project
The assembly of the CO2 pipeline booster pump provided by Yantai Longgang Pump Industry Co., Ltd achieves 100% localization instead of importing from abroad. Breakthrough technological innovations have made long-distance carbon dioxide transportation for the “Qilu Petrochemical – Shengli Oilfield Million Tons CCUS Project” more stable and efficient.
FAQ
Q: What makes Longgang’s centrifugal pumps suitable for extreme temperatures?
A: Longgang designs include features such as dual-casing structures for cryogenics and oil mist lubrication systems for high temperatures. These ensure reliable operation from -163°C up to 450°C.
Q: Can I get customized solutions based on my process fluid?
A: Yes. All wetted parts can be fully customized using special alloys resistant to acids or alkalis, depending on your fluid characteristics.
Q: How do Longgang pumps handle axial thrust?
A: Our models use balance drums or discs along with wear rings that help self-balance axial forces during operation.
Q: Are your products compliant with international standards?
A: Absolutely. All designs comply with API610/682 standards. We also hold certifications, including ISO9001 and API Q1 system compliance.
Q: What industries commonly use Longgang’s products?
A: Our products are widely used in the petroleum and petrochemical industries, coal chemical industry, basic chemical industry, environmental protection projects, and water treatment plants, among others, domestically and internationally.
For those seeking meltdown-proof performance across cold gases or scorching hot feeds—and everything acidic between—Longgang Pump delivers proven reliability through engineering excellence.
