Sizing an Acetylene Plant | KIGL-DA Range

Sizing an acetylene plant against real demand not peak demand

Size an acetylene plant on steady daily output, not the busiest week. Convert cylinders filled per day into cubic metres per hour across the shift length you actually run, add a margin for filling losses, and check the carbide, water and power supply can sustain it. KIGL builds 3 standard models.

Start from what you actually fill

The number that sizes an acetylene plant is not the one people usually quote. It is not the busiest week last year, and it is not what the works might need one day.

It is steady daily output across the hours you genuinely run.

The conversion

Cylinders filled in a normal day — from your own records, not an estimate
× gas per cylinder — giving total cubic metres per day
÷ hours actually run — the shift you work, not the hours the gate is open
+ a margin for filling and purge losses

That gives cubic metres per hour, which is the unit a generator is rated in. Sizing exactly to the calculated figure leaves nothing for the day something takes longer than it should.

Why oversizing is the expensive mistake

A plant sized to the peak spends most of the year idle, while carrying:

the capital
the maintenance regime
the licence and inspection burden
the operator time
the floor space

None of that scales down when the plant is doing nothing. Size to steady demand and cover peaks from cylinder stock, which is exactly what stock is for.

What has to keep up

A generator is not the whole plant, and the rest of the chain has to match it:

Element	Question
Carbide supply and storage	Can you hold and feed enough, graded 4–50 mm?
Water supply	Available at 1.5 × operating pressure, continuously?
Power	Sized for the compressor, not just the generator?
Purification and drying	Rated for the higher throughput?
Filling capacity	Can the bay actually package what the generator makes?
Cylinder stock	Enough cylinders in circulation to absorb the output?

A generator larger than the filling bay behind it makes gas nobody can package. It is a common and frustrating way to spend capital, and it is invisible until commissioning.

Carbide grading changes what you get

Material graded 4 to 50 mm reacts predictably. Outside that band:

Fines react too fast, spiking pressure and temperature
Oversized lumps react incompletely, so carbide leaves in the slurry and yield falls

Poor grading makes a correctly sized plant behave like an undersized one — and since carbide dominates production cost, it shows up in the cost per cubic metre as well as in the output.

If you have undersized

The generator gets pushed toward the top of its band, which means pressure approaching 0.92 kg/cm²g and temperature approaching 70 °C. Neither is a place to operate continuously, and acetylene becomes progressively less stable as temperature rises.

The answer to being short of gas is never to raise the setpoint. The full operating envelope is on acetylene plant operation and maintenance.

Which model

KIGL builds three standard machines — KIGL-DA-25, KIGL-DA-50 and KIGL-DA-100 — and the choice follows the numbers rather than a preference.

Tell us cylinders per day, hours run, cylinder size, and how much the demand varies, and we will tell you which one fits. We will also tell you if the answer is that a plant is not warranted yet — below a certain steady demand, buying cylinders remains cheaper, and that is a conversation worth having before the capital is committed rather than after.

Sources

Sizing an acetylene plant against real demand — frequently asked questions

How do I convert cylinders per day into plant capacity?

Take the cylinders you actually fill in a normal day, multiply by the gas each holds, and divide by the hours you genuinely run — not the hours the works is open. That gives cubic metres per hour, which is the number a plant is rated in. Then add a margin for filling and purge losses rather than sizing exactly to the calculation.

Should I size for my busiest month?

No, and this is the expensive mistake. A plant sized to the peak idles for most of the year while carrying its full capital, maintenance and licensing cost. Size to steady demand and cover peaks from cylinder stock, which is what stock is for.

What else has to keep up with the plant?

Carbide supply and storage, water supply at 1.5 times operating pressure, power, cylinder stock, and the filling capacity to actually put the gas into cylinders. A generator larger than the filling bay behind it produces gas nobody can package, which is a common and frustrating way to waste capital.

Does carbide grading affect the plant I need?

It affects what the plant delivers. Material graded 4 to 50 mm reacts predictably. Fines react too quickly and spike pressure and temperature; oversized lumps react incompletely and leave carbide in the slurry, so yield falls. Poor grading makes a correctly sized plant behave like an undersized one.

What happens if I undersize?

You run the generator harder than its band, which pushes pressure and temperature toward their limits — 0.92 kg/cm²g and 70 °C — and that is not a place to operate continuously. The correct response to being short of gas is never to raise the setpoint.

Which model should I choose?

That depends on the numbers above rather than on a preference. Tell us cylinders per day, hours run, cylinder size and how much the demand varies, and we will say which of the three fits — and whether a plant is warranted at all, since below a certain steady demand cylinder supply remains cheaper.