About Zhutiechengjin: copper-clad steel earthing manufacturer
Beijing Zhutiechengjin Electromechanical Equipment Co., Ltd. was founded in Beijing in 2009 with a registered capital of RMB 20 million and works only on copper-clad steel earthing – development, manufacture and project application. Its subsidiary Anhui Zhutiechengjin Electromechanical Equipment Co., Ltd. (Mingguang, Anhui; registered capital RMB 10 million) is the production base: Beijing handles development, sizing and engineering service, Anhui handles production – one chain from R&D to manufacture to engineering service. Sectors served: power, rail and metro, chemical industry.
First, what we are not. We are not an established copper-clad steel exporter. The company was founded in 2009; we turned to overseas markets in 2026.
But the practice we bring is mature and proven. Replacing solid-copper horizontal earthing with thick-layer, annealed, continuous-cast copper-clad steel has been practised in China for twenty years and millions of kilometres, and is written into a complete chain of standards from the national code to the grid company's own. Copper-clad steel earthing in China began with 0.25 mm electroplated product, to which the established international manufacturers contributed a great deal; the step to replacing copper in medium- and high-corrosivity ground was taken by the thick-layer, annealed, continuous-cast product. We are the newest exporter of that practice, not its inventor.
Our move overseas began with standards work. While taking part in the revision of GB/T 33588.2, China's adoption of IEC 62561-2, we noticed that the IEC text defines copper coated steel in terms of electroplating and does not explicitly cover the continuous-cast, thick-layer product long used in Chinese power earthing. We submitted test data on continuous-cast copper-clad steel and proposed that continuous casting be added to the definition in the Chinese standard; the proposal is included in the revised draft, which is not yet published. We submitted the same technical proposal to the IEEE P80 working group.
That work led us to a further question: how do overseas projects evaluate replacing copper with copper-clad steel? We went through the public material of the main earthing brands and copper-clad steel manufacturers – product information in abundance, but no one we could see offering the replacement itself as a service. Yet that is exactly what a material substitution needs: the conditions of use, conductor sizing, test evidence and jointing on site linked into one chain, so that the designer can check it and the contractor can build it. The higher the copper price, the more that gap costs a project.
So in 2026 we turned to overseas markets, combining China's long experience with copper-clad steel earthing with our own manufacturing, full product range and technical support in which the chief engineer takes part directly, into project-specific replacement assessment and the services around it: from sizing calculations and copper-quantity and cost comparison to test documentation and site support, each step with a defined deliverable and a named technical contact.
The basis for trusting us is not years but verifiability: the selection method is published in full in the technical guides on this site, so your consultant can check every step; the size you specify can be type-tested to DL/T 1312 and reported – DL/T 1312-2023 is the Chinese electric-power industry standard for copper-clad steel earthing conductor, issued by the National Energy Administration, covering every horizontal and vertical form and qualifying it under power-frequency fault current and a 500-hour salt-spray sequence, more demanding than UL 467 (an equipment listing standard with no copper-thickness or corrosion-life requirement for horizontal conductor) or IEC 62561-2 (lightning-protection duty) (item-by-item comparison); send a sample to any accredited laboratory, and if it disagrees with our data sheet we pay for the second test; every sizing report is signed by the chief engineer, who is your direct contact.
Our production base in Anhui
Real photographs, not renderings. Continuous casting, drawing, annealing, stranding and coiling are done on one site, with batch traceability from electrolytic copper and steel rod to the finished coil.
Rod yard: steel wire rod arrives in coils by heat number and is logged with a lot number before it enters the shop – traceability starts here.
Drawing shop: the steel core is drawn to the diameter the casting line needs; rod coils waiting in the foreground.
Round-wire line: in-line take-up after drawing, with the operator inspecting the copper surface throughout.
Take-up station: continuous-cast round wire comes off the line by the reel; floor markings separate the traffic lane from the work area.
Annealing furnace: whole coils are annealed to a soft temper here – this is where the "annealed" that this site keeps insisting on happens. Annealed round wire in the foreground.
Stranding shop: tubular stranders lay single wires into 70–240 mm² strand.
Finished-goods store: reels of round wire and strand awaiting inspection and dispatch, so samples ship quickly.
Packing and dispatch: wooden reel, stretch film and strapping; wood packaging heat-treated and marked to ISPM 15; every reel labelled with model, lot and length.
A manufacturer, not a trader
Round wire, flat tape, ground rods and strand all come from our own plant in Anhui, by continuous casting and electroplating; exothermic welding moulds, powder and connectors are supplied as matched accessories, with copper of 0.25 / 0.6 / 0.8 / 1.0 mm. Every lot is traceable from incoming electrolytic copper and steel rod to the finished reel.
Technical system and compliance
Products are type-tested to the full DL/T 1312-2023 programme (China's dedicated power-industry standard for CCS earthing conductor, with a power-frequency fault-current test and 500 h salt spray – compared with UL / IEC here), with reports issued by a CMA / CNAS dual-accredited laboratory (CNAS recognised internationally under ILAC-MRA); ISO 9001:2015 quality management system (certificate RLAC24Q1L1090R0S, valid to 18 Nov 2027, view certificate); sizing reports prepared by the methods of IEEE Std 80-2013 and GB/T 50065-2011.
Engineering closed loop
Technical support from design selection through site work to operation: free two-option assessment within 24–48 hours, exothermic welding moulds, powder and procedure, attendance at the first joints on site, grid acceptance and O&M support. The chief engineer is your direct contact.
Chief engineer
Cong Yuanxin · Chief Engineer
Author of the engineering monograph Grounding Design and Engineering Practice (China Machine Press, 2014, ISBN 978-7-111-46346-7); member of the drafting group revising GB/T 33588.2, China's adoption of IEC 62561-2 (Lightning protection system components – Part 2: Requirements for conductors and earth electrodes); supplied test data on continuous-cast copper-clad steel and proposed that continuous casting be included in the definition – accepted in the draft, revision not yet published. In September 2026 he submitted, on behalf of the company, the technical contribution Proposed unified definition of copper-clad steel to the IEEE P80 working group (revision of IEEE Std 80) – submitted, not yet acknowledged by the working group; the submission is available on request and its adoption is the working group's decision. He is the principal author of the three technical guides on this site and of the Copper-Clad Steel Grounding System Selection Guide (2026 edition). Your sizing report, welding procedure and site questions are his responsibility directly.
Why the chief engineer is on this website
Because the core deliverable you get from us is not a reel of wire but a signed sizing report and a welding procedure. Who signs it, and what he has done, should be checkable before you order.
LinkedIn: linkedin.com/in/yuanxin-cong
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Landmark projects: the "firsts" our copper-clad steel is part of
We supply several hundred thousand metres a year to urban rail, energy and chemical-industry projects. The projects below carry two kinds of "first". One is the industry's first – China's first 200 km/h urban rail line, the world's first large-scale green-hydrogen-coupled coal-chemical complex – landmark projects that specified our copper-clad steel. The other is copper-clad steel's own first – the first lines in China and in Beijing to have their through-earthing conductor retrofitted with copper-clad steel, done together with the owners and design institutes. Somebody has to be first, and somebody has to get it right; the repeat orders on those lines since are the proof of the second part.
- Xiong'an – Beijing Airport ExpressChina's first 200 km/h multi-function urban rail line
- Beijing Pinggu Line (Line 22)Beijing's first inter-provincial urban rail line (into Hebei)
- Tianjin Jinbin Light Rail Line 9China's first through-earthing retrofit carried out with copper-clad steel
- Beijing Metro Line 10Beijing's first metro line retrofitted with copper-clad steel earthing
- Xinjiang East Hope integrated coal-power projectWorld's first large-scale green-hydrogen + coal-to-olefins coupling demonstration
- Datang Keqi coal-to-SNG projectWorld's largest coal-to-natural-gas demonstration plant in operation
- Ningxia Coal HDPE projectChina's first full-range polyolefin complex downstream of DMTO-III
- Ningxia Coal coal-to-liquids brine salt-separation and resource-recovery upgradeChina's largest coal-chemical brine salt-separation and recovery project
Full reference list, with product sizes, quantities and years, available on request. Copper-clad steel earthing is not experimental in China: millions of kilometres are in service under UHV substations, high-speed rail and PV plants, across coastal saline soil, arid alkaline soil, acidic red soil (pH < 4.5), permafrost and the humid tropics.
Locations
Beijing head office
2/F, Building 11, Zone 3, ABP (Headquarters Base), 188 South 4th Ring Road West, Fengtai District, Beijing 100070, China
Development, sizing, engineering service
Anhui production base
10 Wuyi Road, Mingguang, Anhui Province
Anhui Zhutiechengjin Electromechanical Equipment Co., Ltd. · about 400 km from Shanghai port
Have a project in mind?
Send the conductor size, length, soil and fault current – two sizing options and the copper saving come back within 24–48 hours, free.
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