Gutter manufacturers
Gutter manufacturers
You already form gutters and want the matching box downpipe made in-house, in the same coating and the same batch.
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Solution Library / Gutter & Downspout
Rectangular Downpipe Production Solution for Rainwater Systems
A single-machine solution for plants that need closed rectangular downpipes: decoiling, chain-driven face and corner forming, a lock seam folded on one face, and a cold saw cut. Covers who it suits, how to choose between a box pipe line, a round pipe line and a full drainage package, the facts we can verify, and what to send with the enquiry.
Who it's for
For workshops that sell rainwater goods and want a flat-backed pipe that sits neatly against a wall, instead of a round pipe that stands off on brackets. It also suits contractors who already form gutters and want the downpipe cut in the same finish and the same workshop, and plants supplying replacement lengths rather than full mill lengths.
Wall-mounted drainage specialists
Wall-mounted drainage specialists
Your projects call for a flat pipe against the facade, where a round pipe needs brackets and leaves a gap.
Replacement and repair suppliers
Replacement and repair suppliers
You cut short runs for repairs, where buying full mill lengths leaves unusable offcuts.
How to choose a line
- You need a closed rectangular downpipe that sits flat against the wall -> this single rectangular downpipe line (One machine, one roll set, one operator; the seam runs on one face.)
- You need a round downpipe instead -> go to the round downpipe process page and its own machine (A circle needs different rolls and a different closing sequence; the two are not interchangeable roll sets.)
- You need a true square section with equal sides -> go to the square downpipe process page (Equal sides change the corner sequence; confirm the drawing before quoting.)
- You need the open gutter as well as the pipe -> go to the Gutter & Downpipe Roll Forming process page and the paired-line solution (Two products, two roll sets, two specifications; sharing the plant is not one machine.)
- You need elbows and reduced ends -> add a pipe bender as an auxiliary machine (About 2.2 kW, up to roughly 90°, quoted separately and not part of the forming pass count.)
- Your coil is heavier than 3 t -> specify a powered or hydraulic decoiler (Confirm coil weight and inner diameter before the line is sized.)
Example specification
One delivered example. Final numbers follow your quotation.
| Machine | D-76 rectangular downpipe lock-seam line, single machine |
|---|---|
| Working speed | 8–10 m/min, published for this build |
| Main motor | 4 kW |
| Hydraulic power | 3 kW |
| Control | PLC with touchscreen |
What to send for a quote
- 1.Section drawing with width, height, corner radius, wall thickness and seam position
- 2.Material and coating, plus yield strength if high-strength coil is used
- 3.Ordered lengths, for example 2 m or 3 m
- 4.Coil weight and inner diameter available at your plant
- 5.Required output per shift or per day
- 6.Voltage, frequency and phase at the destination
- 7.Whether elbows and reduced ends are needed, and in what quantity
- 8.Destination port and preferred incoterm
Check before you quote
Round downpipe line
Round downpipe line
Rolls the strip into a circle and closes the seam at the top; a different roll set and a different closing station.
Square downpipe line
Square downpipe line
Equal-sided section; the corner sequence differs from a rectangle and must be quoted from its own drawing.
Gutter machine
Gutter machine
Forms an open channel with a bead and hanger zone; open section, different cut, different rolls.
Welded tube mill
Welded tube mill
Joins the strip by welding with edge preparation and post-weld treatment; this line folds a mechanical seam.
Elbow bender
Elbow bender
Bends a finished pipe into an elbow; it does not form the pipe and is quoted separately.
FAQ
Can this line make a round pipe as well?
No. A circle needs different rolls and a different closing sequence. Plants that sell both keep two roll sets or two machines.
Why is the seam on a flat face?
A face seam closes without pulling the corner radius out of shape, and it hides on the side that faces the wall.
Is the pipe welded or locked?
Locked. The edges are folded into a single lock seam, which is why thin coated coil works on this line.
Q&A for this solution
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