Published: 2026-07-17
Against the backdrop of continuous advancement toward high‑end, intelligent, and green development, large‑scale petrochemical projects are steadily moving toward higher efficiency, greater reliability, and enhanced safety. As a vital component of modern process industry, the ethane‑to‑ethylene project not only bears the important task of extending and upgrading the industrial chain, but also imposes higher requirements on automation systems and industrial communication networks.
01 Project Background
The automation system construction for the Lanzhou Petrochemical Yulin 800,000 t/a Ethane‑to‑Ethylene Project is a key practice carried out under this context. Faced with typical petrochemical scenarios featuring long process flows, numerous equipment units, and high demands for continuous production, the automation system undertakes critical tasks such as production control, data acquisition, equipment monitoring, and operation scheduling. More importantly, it serves as the fundamental basis for ensuring safe, stable, and continuous operation of the entire plant.
For a large‑scale ethane‑to‑ethylene project, a stable, efficient, and reliable industrial communication network must be established among the control layer, management layer, and field device layer to truly support the smooth operation of the entire automation system. Especially in petrochemical environments, where electromagnetic conditions are complex and continuous production requirements are stringent, any communication fluctuation can have cascading effects on system interlocking, production organization, and operational efficiency.
Therefore, the reliability, redundancy capability, environmental adaptability, and manageability of industrial network devices become a critical link in the construction of the automation system.
02 MRD Involvement
During the construction of the automation system for the Lanzhou Petrochemical Yulin 800,000 t/a Ethane‑to‑Ethylene Project, MRD TNM4000 Series Layer 2/Layer 3 industrial switches were deployed to support the industrial communication network, providing a solid guarantee for the stable operation of the project's automation system. Their core value is mainly reflected in the following three aspects:
Highly Reliable Industrial Communication Foundation
The TNM4000 Series is built on a high‑performance hardware platform and a proprietary software platform, supporting a rich set of Layer 2/Layer 3 routing protocols and industrial ring network protocols. It meets the comprehensive requirements of large‑scale process industry projects for network layering, stable forwarding, and system coordination.
Redundancy Assurance for Continuous Production
The products support multiple redundancy mechanisms, including STP, EAPS, ERPS, RSTP, MSTP, and MRD‑Ring®. The self‑healing time of the industrial Ethernet ring network is less than 50 ms (typical value), effectively improving network availability and fault recovery capability, and providing stable support for continuous production scenarios.
Industrial‑Grade Design for Harsh Environments
The TNM4000 Series features a die‑cast aluminum alloy housing with a fanless, low‑power design, supports dual 220 V wide‑range industrial power inputs, and operates over a temperature range of –40°C to +75°C. It offers IP40 protection rating and EMC Level 4 electromagnetic compatibility, making it well‑adapted to the complex and harsh industrial environments typical of petrochemical sites.
03 MRD Related Equipment
TNM4000 Series Layer 2/Layer 3 Industrial Switches
·High‑performance, highly reliable core network devices designed for critical industrial scenarios.
·Backplane bandwidth up to 128 Gbps, supporting a rich set of Layer 2/Layer 3 protocols and industrial ring network protocols;
·Supports STP, EAPS, ERPS, RSTP, MSTP, and MRD‑Ring®; industrial Ethernet ring self‑healing time < 50 ms (typical value);
·Supports SNMP network management platform, logging, RMON, port mirroring, TRAP, as well as CPU protection, storm control, 4K VLAN, IPv4/IPv6 multicast, and more.
·The product features dual 220 V wide‑range industrial power inputs, fanless design, operating temperature –40°C to +75°C, IP40 protection, and MTBF ≥ 800,000 hours.
PAT4000 Series Industrial Switches
·Core hardware components – including processors, switching chips, and physical‑layer chips – are all domestically produced, and the switch runs on a Linux‑based operating system with domestic intellectual property rights.
·Supports multiple redundant ring network topologies, with any two ports able to form a self‑healing ring, and supports multiple independent self‑healing rings.
·Provides packet loss protection mechanisms for rapid recovery from network failures.
·Supports IGMP snooping and GMRP.
·Supports port‑based unicast MAC binding.
·Supports multiple multicast protocols and offers highly secure anti‑attack features.
·Supports broadcast storm control, with storm suppression enabled by default.
·Supports QoS (IEEE 802.1P/1Q and TOS/DiffServ).
·Supports multiple management methods including CLI, Telnet, and Web, as well as SNMPv1/v2c/v3‑based network management software.
·Supports RMON.
·Supports port mirroring.
·Adopts redundant dual‑power input design.
The successful implementation of the Lanzhou Petrochemical Yulin 800,000 t/a Ethane‑to‑Ethylene Project has fully validated the reliability and adaptability of MRD industrial switches in large‑scale process industry scenarios, and has set a new industry benchmark for petrochemical automation communications. As a leading enterprise in independently controllable industrial communication, Shanghai MRDCom Co., Ltd. – with its domestic hardware/software platforms and core proprietary protocols – continues to drive the domestic substitution process in critical sectors, providing a solid foundation for the safe, stable, and continuous operation of national‑level petrochemical projects. Looking ahead, MRD will continue to deepen its presence in process industry communications, delivering more reliable products and more professional services to help China's industry steadily advance toward high‑end, intelligent, and green development.
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