Shanghai Qinkai Industrial Co., Ltd. said it will handle the entire process from product design to factory supply on domestic thermal power plant projects, supplying wire troughs, steel beam supports, finished supports and connecting pieces as one package.
Thermal power plants are among the most cable-intensive structures in industry. Power, control and instrumentation circuits share the same buildings at different voltages, elevations and fire compartments, and every run has to be carried, separated and protected from the others. Qinkai’s scope covers the structure that does that carrying — drawn to the plant’s own layout, fabricated in one shop, and shipped ready to install.
| Supplied item | Role in the plant | What the specification has to fix |
|---|---|---|
| Wire troughs | The physical route for power, control and instrumentation cable, at every level and elevation | Protection level, pulling access, bending and continuity between sections |
| Steel beam supports | The load-bearing members that carry trough runs and their cable loads across spans between structures | Span, deflection under cable and maintenance loads, and hole positions against the plant’s steelwork |
| Finished supports | Prefabricated, treated support assemblies delivered ready to fix instead of being cut and welded at elevation | Dimensional consistency across the batch, and finish on cut edges and welds |
| Connecting pieces | The interfaces — cleats, clamps, brackets, connectors — that hold the run to its support and the support to the structure | Material pairing, hole compatibility across all four items, and resistance to vibration loosening |
“The package is not four products,” the company said. “It is one route through the plant. If it is specified as four separate purchases, the plant finds out at erection stage.”
Three constraints decide the route before a single support is drawn
Cable routing in a thermal plant is fixed by three requirements that tend to move at different speeds.
Separation: Power, control and instrumentation cables cannot share a route, and fire compartment boundaries cannot be crossed without the right treatment. That fixes the number of parallel trough lines long before anyone chooses a support.
The load path: Cables are heavy, and a run that crosses between two structures is a structural question: what carries it, at what span, with what deflection, and with what allowance for maintenance access and later additions. On thermal work this decision often lands on steel that is being detailed simultaneously, which is why Qinkai’s scope includes the supports themselves rather than only the troughs.
The interface: With everything else. Piping, ductwork, walkways, platforms, expansion joints and equipment access all occupy the same elevations. During detailed design these routes move, and the support package has to move with them.
Following the cable route through the plant
- In the boiler and steam generator area the constraint is heat and vibration.
- In the turbine hall the cables are heaviest and the runs are longest.
- In switchgear and control rooms the priority is separation, order and access.
- Outdoors and in cable trenches the exposure does the damage.
- Finished supports appear throughout the route for one reason: in a plant where several trades work the same elevation at the same time, a support that arrives complete is installed in a fraction of the time.
Where a split scope breaks: three moments in the programme
During detailed design: Routing changes are normal. When the troughs are designed by the plant’s engineers and bought as parts from a supplier, each change becomes a new enquiry, a new lead time and, frequently, material that no longer fits.
At shop drawing approval: Supports designed against one reference and structural steel detailed against another produce hole positions that do not line up. The difference is closed on site with reaming and packing, and the node no longer performs the way it was calculated.
At elevation: When supports arrive as loose steel, the plant pays for the assembly twice — once to a fabricator and once to a site crew standing on scaffolding. It also loses control of the finish: field-welded and field-cut surfaces are the first places corrosion starts in a humid plant.
Handling the design as well as the supply removes the handover between those three moments. The routing change is absorbed into a shop drawing, the hole datum is common across all four items, and the assembly arrives finished.
Why the work keeps coming
The domestic market behind these packages remains an active construction market. Global Energy Monitor reported that China commissioned 30 GW of new coal-fired capacity in the first half of 2026, 43 percent more than in the same period a year earlier, while a further 25.4 GW entered construction. The Financial Times reported on Jan. 14, 2026, citing Global Energy Monitor data, that 85 coal-fired units were scheduled to open in China during 2026, roughly 55 GW of a global total of about 63 GW.
Units built on that rhythm each carry their own cable routing, elevations and support package. The work is repetitive in method and bespoke in detail at the same time, which is the combination a design-to-supply scope is built for.
Post time: Sep-24-2026