I. Project Name

Yan’an Petrochemical Plant Campus Network Time Synchronization Construction Project

II. Duration of Cooperation

2026 year

• Company Profile of Yan’an Petrochemical Plant

The Yan’an Petrochemical Plant of Shaanxi Yanchang Petroleum (Group) Co., Ltd. is affiliated with the Refining and Chemicals Company of Shaanxi Yanchang Petroleum Group. 2009 Completed and commissioned in [year], it is a core enterprise within the refining and petrochemical segment of Yanchang Petroleum Group and a key project of the Northern Shaanxi Energy and Chemical Base. The company’s primary business includes crude oil processing, as well as the production of petroleum products and chemical commodities. It is equipped with comprehensive automated control systems, safety monitoring networks, and robust storage‑and‑transportation management frameworks, fulfilling a critical role in ensuring regional energy supply. Its plant facilities operate continuously, with highly integrated production systems that meet stringent standards for network time synchronization and system stability, while the company persistently advances intelligent and digital transformation initiatives across its operations.

• Procurement Products

Beijing Zhongxin Chuang DNTS-9 NTP Network Time Server

Product Details

DNTS-9 It is an industrial-grade product independently developed by Beijing Zhongxin Chuang. NTP Network time server, specifically designed for industrial applications such as energy, petrochemicals, and power, provides a high-precision, highly reliable, network-wide unified time‑synchronization reference. The device supports BeiDou, GPS Dual-mode satellite signal reception, with flexible configuration of timing source priorities, enables autonomous and controllable time‑source management.

Core Technical Parameters:

1. Satellite reception: supports BeiDou, GPS Multi‑mode compatible, with high sensitivity in receiving timing‑antenna signals, and well suited to the obstructed environments typical of industrial sites.

2. Timing Performance: Built-in Temperature-Compensated Crystal Oscillator OCXO , maintaining high-precision continuous timekeeping under satellite lock-loss conditions;

3. Network Time Synchronization: Supported NTP/SNTP V1/V2/V3/V4 Protocol, multiple independent Ethernet time‑sync ports;

4. Time synchronization accuracy: Within the local area network, terminal time‑synchronization accuracy is at the microsecond level.

5. Management method: Built-in Web Management interface, supports SNMP Network management, remote status monitoring, and fault alarms;

6. Hardware features: Industrial‑grade wide‑temperature design, excellent electromagnetic interference immunity, and compliance with the stringent operating standards of complex industrial environments in petrochemical plants.

7. Output interface: expandable as needed IRIG-B 、 1PPS Output standard time signals for interfacing. DCS 、 SIS Industrial control systems.

DNTS-9 Balancing universality with industrial‑grade compatibility, it is widely deployed across energy infrastructure—including refineries, oil and gas pipelines, gas distribution stations, and power plants—providing a unified, standardized time reference for industrial control systems, security surveillance, and data‑acquisition platforms.

V. Customer Requirements

1 , factory area DCS Control system, SIS A unified standard time reference is required for various types of equipment, including safety instrumented systems, video surveillance systems, data acquisition servers, and industrial switches.
2 In petrochemical environments, electromagnetic interference is prevalent, necessitating that time‑synchronization equipment exhibit robust environmental resilience to ensure long‑term, continuous, and stable operation.
3 , supports BeiDou satellite time synchronization, ensuring autonomous and controllable time sourcing; when satellite signals are temporarily interrupted, the device can continue to operate. Accurate Punctuality;
4 , compatible with mainstream NTP/SNTP The protocol is compatible with the plant’s existing industrial network architecture, facilitating subsequent operations and maintenance.
5 , Standardize the time‑keeping baseline to ensure the accuracy of timestamps for production logs, fault records, and alarm messages, thereby facilitating incident tracing and process‑data analysis.

VI. Solution

In conjunction with the production network architecture of the Yan’an Petrochemical Plant and industry standards, Beijing Zhongxin Chuang was deployed. DNTS-9 NTP The server serves as the primary time reference source for the plant site.
DNTS-9 Supports BeiDou, GPS Multi‑mode satellite reception with customizable satellite signal priority; the device features a self‑developed all‑digital phase‑locked loop (PLL) synchronization algorithm and an integrated temperature‑compensated crystal oscillator (TCXO) timing unit, ensuring continuous provision of standard time even under abnormal satellite signal conditions. The device connects to the enterprise network via the plant’s core switch, providing unified time‑synchronization services to the control system, monitoring platform, and IT servers. NTP Time service; supported Web 、 SNMP It supports multiple management modes, enabling operations and maintenance personnel to perform remote configuration, monitor system status, and receive fault alerts. The entire solution does not alter the existing industrial network architecture, features a short implementation timeline, and is compatible with a wide range of existing industrial endpoints.

VII. Implementation Outcomes

Following the completion of deployment and commissioning, all network devices and industrial control systems within the plant have achieved unified time synchronization across the entire network. The time‑synchronization service operates stably, with timing errors compliant with the automation industry standards for the petrochemical sector. Unified Accurate A time‑based reference ensures the temporal reliability of production data, enables clear root‑cause analysis of fault events, enhances safety management and control across the plant, and supports the implementation of digital operations and maintenance practices.

VIII. Directory of Typical Industry Application Customers

China National Pipeline Group, Sinopec, PetroChina, CNOOC, Hengli Group, China Shenhua, Air Liquide, Zhongyuan Petrochemical, Yangzi Petrochemical, Changqing Petrochemical, Daqing Refining & Chemical, Shanghai Petrochemical, Tianjin Petrochemical, Yanshan Petrochemical, Zhanjiang Petrochemical, Langfang Petrochemical, Gansu Petrochemical, Anqing Petrochemical, Daqing Petrochemical, Sino‑Saudi (Tianjin) Petrochemical, PetroChina Qingyang Petrochemical Company, Jinzhou Petrochemical, Yan’an Petrochemical, Inner Mongolia Yidong Group’s Dongxing Chemical, Chongqing Huafeng Chemical, Hengli Petrochemical (Dalian) Refining & Chemical, Cangzhou Huahai Refining & Chemical, Daqing Oilfield, Daqing Refining & Chemical, Qinshan Nuclear Power Plant, Jingxi Gas, Kunlun Gas, ENN Natural Gas Co., Ltd., Hope Gas, Shenzhen Gas, Zhongyuan Ethylene, Jiaxing Iwatani Gas, PetroChina Yellow Sea Storage Base, Beijing Shougang Co., Ltd., Hebei Shougang Qian’an Iron & Steel, Fujian Sangang Mingguang Co., Ltd., Angang Steel Co., Ltd., Fujian Mingang, Chongqing Iron & Steel (Group), Tangshan Iron & Steel Group, Tianjin Jinwanhang Petroleum Materials & Equipment, Tarim Oilfield, China Bluestar North Chemical Machinery, North China Petroleum Communications, Wuhan Iron & Steel Group, Shaanxi Yulin Energy Group, China Huaneng Group, CGN Group, Yankuang Group, Northern Pipeline of China National Pipeline Group, the China–Russia East Pipeline, Lanzhou Oil and Gas Transmission Branch of the Southwest Pipeline, Huadian Environmental Protection Systems Engineering, CGN Topu (Hubei) New Materials, Sinosteel Group’s Xingtai Machinery, Luxi Chemical, Guangxi Liugang Zhongjin Stainless Steel, Korla - Shanshan Crude Oil Pipeline Capacity Expansion Project, Huade Petrochemical in Daya Bay, Huizhou; Xinjiang Tianli High‑Tech Petrochemical Co., Ltd.; Guangzhou Zhonghuan Natural Gas Development; Lutianhua; Ningbo Fude Energy; Lianhong Chemical; Qinghai Oilfield; CNOOC; Karamay Oil and Gas Storage & Transportation Company; Jiuquan Iron & Steel Group; Fujian Sangang Group; Liugang Group; Ningbo Aluminum; Hesheng Silicon Industry; Dalian Liquefied Natural Gas of the National Pipeline Network; Shaanxi Changqing Energy & Chemical; Shanxi Northern Xing’an Chemical Industry; Qingdao Siyuan Chemical; Taiyuan Heavy Industry New Energy Equipment; Guizhou Chitianhua Group; Bingang Steel Group; Maoming Petrochemical Liquefied Air Gases; Heilongjiang Haohua Chemical; ENN Gas; Fenxi Mining Group; Hangzhou Hengli Manufacturing; Tangshan Guotang Steel; Korla. - Shanshan Crude Oil Pipeline Capacity Expansion Project, Xinjiang Yili Company, Hetang Natural Gas CNG Station, Lunan Chemical, Air Liquide (Wuhan) High-Tech Gases, Guangzhou Zhonghuan Natural Gas Development, Daqing Refining & Chemical Company, Xianyang Petrochemical Plant, Tangshan Zhengfeng Iron & Steel, Hubei Sanjiang Aerospace Jianghe Chemical, Wuhai Power Supply Bureau, Shanghai Heavy-Duty Gas Turbine, Tianjin Bohua Yongli Chemical, Shandong Pipeline Network, BASF Petrochemical, Yankuang Lunan Chemical, Sichuan Lutianhua, Sinochem Nantong Petrochemical Storage & Transportation, Sinopec Pipeline Storage & Transportation Company, Suizhong County, Liaoning Province 36-1 Factory Natural Gas Processing Plant, Chongqing Haizhuang Wind Power Engineering Technology, Huaibei Mining, Shuangliu Coal Mine, Jiangxi Copper Group Guixi Smelter, Jingtang Air Separation, National Pipeline Group Shandong Pipeline, Shandong Coal Mine, Sinopec Yizheng Chemical Fiber, Xinjiang Xinye Energy & Chemical, China Resources Gas, Sinosteel Group Xingtai Machinery Roll, Qinrui Petrochemical, Tote Mechanical & Electrical, Inner Mongolia Smart Operation & Maintenance New Energy, Hengyi Petrochemical, Binzhou CNOOC Refining & Chemical, Zhongtai Chemical.

The choice of numerous departments and enterprises reflects recognition of Zhongxin Chuang’s products and services. By working in close collaboration with partners across all sectors, we are jointly advancing toward win‑win outcomes for businesses and society alike.