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A complete gypsum plant takes 4–6 months of on-site work to install and commission, and a turnkey gypsum plant is not handed over when the last bolt is tightened — it is handed over when the line holds its rated output. That distinction decides whether you are selling board in month five or arguing about acceptance in month nine.
Installation and commissioning is one contract stage made of five phases. Skipping any of them is where most schedules lose time.
Phase | What happens | What it produces |
Mechanical erection | Setting belt, forming station, dryer, conveyors and stacking system levelled and aligned to drawing | Equipment fixed in tolerance |
Electrical and control | Motors, VFDs, instruments, Siemens PLC and HMI wired; interlock and safety circuits tested | Line controllable from the panel |
Cold commissioning | Dry runs without material: rotation, belt tracking, sequence logic, emergency stops | Line runs empty and safely |
Hot commissioning | Material feed, first board, setting time and dryer curve adjusted, edge trim and stacking set | Board on specification at target speed |
Training and handover | Operators and maintenance crew trained on their own shift; documents and spare parts list handed over | Client team runs the line alone |
Contract to production is normally 12–18 months, and only part of that is on site.
Stage | Typical duration |
Process design and layout | Before manufacturing; depends on how complete the raw material and site data are |
Manufacturing and factory testing | 1–3 months |
Shipping | Depends on destination port |
On-site installation and commissioning | 4–6 months for a complete line |
The 4–6 months sit at the lower end when foundations, power supply and water are ready the day the containers arrive. Most overruns are civil works, not equipment.
The division of scope is written into the supply contract, and it is the part of a turnkey gypsum plant that most often gets misunderstood. A gypsum board line installation service normally covers erection supervision and commissioning; civil works, utilities and site labour stay with the client. The standard split on a gypsum plant turnkey project is:
Client side | DCI side |
Site and civil works: foundations, workshop building, roads | Process design, plant layout, equipment selection |
Power to the main control panel, water, compressed air | Manufacture, factory testing, packing, shipping documents |
Fuel supply and storage | Engineer supervision of mechanical erection |
Local labour, crane and forklift | Electrical and PLC commissioning |
Accommodation, site transport and permits for engineers | Hot commissioning to rated output |
Customs clearance and inland transport | Operator training, handover documents |
Anything outside these two columns — a captive power plant, a laboratory, a packing hall — is quoted separately and should be stated in writing before the contract is signed.
1. Cold run. The line runs empty before any material is introduced. Rotation direction, belt tracking, chain tension, interlocks, emergency stops and the full PLC sequence are proven without material. Faults found here cost hours; the same faults found with material in the mixer cost days.
2. Hot run. Material enters the system and the first board comes off the line. Stucco-to-water ratio, accelerator and retarder dosing, foaming agent, setting belt speed against board thickness, dryer temperature zones and edge trim are adjusted. The first board is usually close to specification; the days that follow are spent making that result repeatable.
3. Rated output. A line is accepted when it holds nameplate capacity at the specified thickness over a sustained run — not when it touches that rate once. This is the number written into the contract, and the only one that matters commercially.
Most delays on an overseas gypsum plant project come from six inputs that were fixed too late.
1. The raw material is not the sample. Purity, crystal size, moisture, and in FGD or phosphogypsum the chloride, phosphate and soluble salt content all change calciner settings and additive dosing. Send a representative bulk sample from the actual deposit or the actual FGD source before the design is frozen.
2. Power supply. Voltage fluctuation and unbalanced phases are common on new industrial sites. State voltage, frequency and stability in the enquiry so motors, drives and starting current are sized correctly.
3. Fuel specification. A dryer designed around 5,500 kcal/kg coal behaves differently on 4,200 kcal/kg, and gas pressure matters as much as gas availability. Lock the fuel data during design, not during commissioning.
4. Climate. Ambient humidity and temperature shift setting time and dryer load. A line on a humid coastal site needs more drying capacity than the same line inland.
5. Spare parts. A failed bearing or a worn forming belt stops production for weeks when the part is a week's freight away. Order a first-year spare parts list with the line and confirm what can be machined locally.
6. Knowledge transfer. Commissioning knowledge has to land with the operators, not stay with the engineer. Train the client's own staff on their own shift, with written procedures in the plant's working language.
In Ghana, a 100,000 t/yr gypsum powder line is under installation. In Russia, a customer expanded its board line capacity after its 150,000 t/yr powder line reached rated output — a repeat order is the most honest measure of a commissioning. In Oman, DCI has delivered board, powder and block lines, including 20 million m²/yr board, 180,000 t/yr powder and 300,000 m²/yr block. In Kyrgyzstan, a 10 million m²/yr board line is in production and the plant is adding a second line.
Every line carries a 12-month warranty from acceptance, remote technical support on working days, and continuing supply of spare parts, wear parts and production raw materials — modified starch, foaming agent, glue, fiberglass, edge banding and facing paper. Older lines can be upgraded rather than replaced: an 18,000 t/yr powder line in Oman was later doubled to 36,000 t/yr.
Ask every supplier the same six questions and put the answers in the contract.
1. How many engineers, for how many days, and is that included in the price or billed per day?
2. Is commissioning to rated output included, or does the on-site period end when the equipment runs?
3. Who pays international flights, accommodation, visas and local transport?
4. How many operators are trained, for how many days, and in what language are the manuals?
5. What happens if the line does not reach rated output within the agreed period?
6. Which spare parts are included for the first year, and what is the lead time on wear parts?
An offer that prices installation supervision separately and stops at "equipment running" is not the same product as one that accepts the line at rated output. Compare the total delivered gypsum board plant cost, not the day rate.
Q: How long does installation take for a complete gypsum board line?
A: Plan for 4–6 months on site for mechanical erection, electrical work, cold and hot commissioning and training. Contract to production is typically 12–18 months including design, manufacturing and shipping.
Q: Do your engineers stay until the line reaches full capacity?
A: Yes. The commissioning target is rated output at the specified board thickness and line speed, and engineers remain on site until it is met.
Q: Can we install the line with our own team?
A: Not recommended for a complete line. Erection tolerances, PLC sequencing and the setting-time and dryer adjustments during hot commissioning are process work, and errors there surface months later as quality problems.
Q: Who pays for flights and accommodation?
A: It is agreed in the contract before signing and stated in writing. Ask for it in the quotation, not in a later email.
Q: What support is available after handover?
A: A 12-month warranty from acceptance, remote support on working days, spare parts and raw material supply, and an upgrade path for existing lines.
Send us your target capacity, block size and available fuel, and our engineering team will return a tailored configuration and quotation. Hengshui Decheng Machinery & Equipment Co., Ltd. (DCI) — Email: dci@chinagypsummachine.com | WhatsApp: +86 13930110827 / +86 18203235588
| www.dcimachine.com
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