Shandong Dongming Petrochemical (2019) — PP Ethylene Liquefaction Unit

Lmart manufactured PP Ethylene Liquefaction Unit for Shandong Dongming Petrochemical (2019). Scope: 45 kW • Propylene (R1270) • Ethylene liquefaction.

Client	Shandong Dongming Petrochemical (2019)
Equipment	PP Ethylene Liquefaction Unit
Design Code	GB
Scope	45 kW • Propylene (R1270) • Ethylene liquefaction

Customer Background

Shandong Dongming Petrochemical is a recognized participant in the petrochemical processing sector based in China. The company’s operations involve process equipment that must meet stringent safety, quality, and performance standards demanded by the industry and regulatory authorities.

This project required PP Ethylene Liquefaction Unit engineered to GB standards using ti, reflecting the technical demands of the application and the client’s commitment to equipment reliability and regulatory compliance.

Challenges and Engineering Requirements

Process Temperature Control in petrochemical processing

Shandong Dongming Petrochemical required precise low-temperature cooling for PP Ethylene Liquefaction Unit service in the petrochemical processing sector. The brine chiller system must maintain stable outlet temperatures within narrow tolerances despite variable process heat loads. Fluctuations in feed composition, ambient temperature swings, and seasonal load variations all affect the refrigeration duty — the system must respond to these changes while protecting compressor operation from surge and liquid carryover.

Refrigerant Selection and Safety

The choice of the selected refrigerant reflects the balance between thermodynamic efficiency at the target evaporating temperature, compatibility with the plant’s existing refrigerant infrastructure, and safety classification under the applicable code. Each refrigerant brings specific considerations: flammability limits for hydrocarbon refrigerants, operating pressure ranges that affect component sizing, and oil miscibility that influences compressor lubrication system design.

Integration with EPC Engineering

The chiller packages were specified and documented by the project EPC/design institute as part of a larger process unit. This means every interface — brine supply/return connections, electrical load requirements, control signal protocols, and physical footprint — must match the EPC’s plot plan and P&ID exactly. Any deviation requires formal design change management, adding time and cost to the project.

Why Shandong Dongming Petrochemical Selected Lmart

Integrated refrigeration package capability. Lmart designs and manufactures complete refrigeration systems — compressor selection, heat exchanger sizing, piping layout, control logic, and skid-frame engineering — as a single-source supplier. This eliminates the interface risks that arise when the chiller vendor, vessel fabricator, and system integrator are separate companies.

Process refrigerant experience. Lmart has delivered refrigeration packages using propylene, propane, ammonia, R134a, and other process refrigerants across petrochemical, chemical, and marine applications. This experience base means the engineering team understands the specific requirements of each refrigerant — safety classifications, oil management, capacity control methods — without a learning curve.

Repeat performance. Lmart has delivered equipment to Shandong Dongming Petrochemical and similar clients in the petrochemical processing sector, demonstrating consistent quality and on-time delivery performance across multiple projects.

Engineering and Manufacturing Solution

Lmart engineered and fabricated PP Ethylene Liquefaction Unit for Shandong Dongming Petrochemical to GB using ti. The scope of supply included complete detail design, material procurement, fabrication, inspection, testing, and documentation.

Key engineering considerations for this project included thermal-hydraulic performance optimization, material selection for the specific process environment, and compliance with GB requirements for design, fabrication, and inspection.

The equipment was manufactured at Lmart’s Zhangjiagang facility, which provides full-cycle fabrication capabilities including plate rolling, head forming, machining, welding (SAW, GTAW, SMAW), post-weld heat treatment, and NDE — all under a single quality management system.

Quality Control and Project Execution

All equipment was manufactured under Lmart’s ISO 9001-certified quality management system with the following key inspection milestones:

• Material verification: Incoming inspection of all plates, forgings, and fittings against mill certificates; PMI spot checks on alloy materials
• Welding quality: All welding performed by qualified welders using approved WPS/PQR; NDE per GB requirements including RT/UT on pressure-retaining welds
• Dimensional inspection: In-process dimensional checks at shell rolling, head forming, and final assembly stages
• Pressure testing: Hydrostatic test to GB requirements, witnessed by the authorized inspector and/or client representative
• Documentation package: Complete data book including material certificates, weld maps, NDE reports, dimensional records, and test certificates

Equipment was delivered to Shandong Dongming Petrochemical’s project site in China, meeting the project schedule requirements.

Results and Business Impact

Lmart successfully delivered PP Ethylene Liquefaction Unit to Shandong Dongming Petrochemical, meeting the project’s quality, schedule, and documentation requirements. The equipment was manufactured in ti to GB standards, with full documentation packages accepted by the client and applicable inspection authorities.

This project reinforces Lmart’s position as a qualified manufacturer for petrochemical processing applications, demonstrating the company’s ability to deliver equipment that meets international quality and certification standards.

Customer Voice

“The equipment was delivered on schedule and the documentation package was complete. The quality of fabrication met our inspection requirements.”

— Shandong Dongming Petrochemical project team (paraphrased from project review)

Note: Lmart respects client confidentiality. Specific contact references are available upon request during the qualification process.