Pneumatic Spot Welding Machine
Discover COORIG's SDM-1602, the ultimate spiral duct machine for sale. Perfect for high-quality spiral duct work and manufacturing.
View productThe price you pay on day one is rarely the number that decides whether a line makes money. Downtime, spare-part availability, commissioning quality and the time it takes to re-set the line for a different flange type all compound over the years that follow. This guide turns that reality into a working checklist: factory verification first, spec-sheet interrogation second, delivery scope third. It shows how to qualify a real duct making machine manufacturer rather than a reseller, and how to test any auto duct line machine supplier against your own coil, board width and flange mix before you sign. The worked example throughout is COORIG's Auto Duct Line 3, using its published parameter table, basic configuration and automation flow.
Before you compare a single specification, settle the entity question. A line assembled from bought-in frames and third-party controls will behave very differently once it is under load in your shop. Ask for these eight proofs in writing, and treat a refusal on any one of them as a qualification failure rather than a talking point.
| # | Verification point | What a manufacturer provides | Red flag to watch |
|---|---|---|---|
| 1 | Frame and roller machining | In-house machining of the frame, shafts and forming rollers, with the workshop open to a live video tour or site visit. | The same generic factory clip sent to every enquiry, with no way to tie it to your order. |
| 2 | Weld quality | Sample welds you can inspect in person, and a named welding method for the frame rather than "standard". | Weld photos that cannot be linked to the machine being quoted. |
| 3 | Control system | A named control brand plus a screen list covering uncoiling, leveling, reinforcing, punching, forming and shearing. | "Intelligent control system" with no brand, no screen list and no manual. |
| 4 | Test run on your coil | A run on the material and gauge you will actually buy — galvanized or stainless — not on the easiest sheet in the yard. | A demonstration on thin galvanized sheet only, with your material deferred to after payment. |
| 5 | Installed base references | Two or three operators in markets similar to yours who will take a call about service and reliability. | References you cannot contact, or none offered at all. |
| 6 | Export documentation | Packing list, layout drawings and an electrical configuration matched to your site supply. | Documentation released only after full payment. |
| 7 | Service response | A named contact, a working channel and a stated response time for a stopped line. | A generic inbox with no owner and no commitment. |
| 8 | Warranty terms | A written scope and duration, naming which parts are covered. | Warranty promised in conversation but never written into the offer. |
If you travel to inspect the plant, photograph these six things. They give you evidence to compare between suppliers long after the visit ends.
A nameplate figure is a target, not a measurement. The useful discipline is to take the published table and force every number into a question about your own material. The table below is the manufacturer's published parameter set for the Auto Duct Line 3 family — four order codes, two board widths and two thickness classes.
| Order code | Model | Sheet metal & plate thickness (mm) | Max board width (mm) | Max feed speed (m/min) | Max roll weight (kg) | Dimensions L×W×H (mm) | Total power (kW) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 1023 | ADL-L3C12S08-1250 | 0.5–1.2 galvanized; 0.5–0.8 stainless | 1250 | 15 | 7000 | 8200×1750×1500 | 9 | 3500 |
| 1024 | ADL-L3C15S12-1250 | 0.5–1.5 galvanized; 0.5–1.2 stainless | 1250 | 15 | 7000 | 9200×1750×1500 | 9 | 5500 |
| 1025 | ADL-L3C12S08-1500 | 0.5–1.2 galvanized; 0.5–0.8 stainless | 1500 | 15 | 7000 | 8200×2200×1500 | 9 | 3500 |
| 1026 | ADL-L3C15S12-1500 | 0.5–1.5 galvanized; 0.5–1.2 stainless | 1500 | 15 | 7000 | 9200×2200×1500 | 9 | 6000 |
Publisher's note as printed on the product page: "The appearance, configuration, and technical parameters of the equipment are for reference only. Please refer to the actual product for accuracy."
Not simply "what thickness does it handle?" — the answer hides the material. On the Auto Duct Line 3, the C12S08 models (order codes 1023 and 1025) are published at 0.5–1.2 mm galvanized and 0.5–0.8 mm stainless; the C15S12 models (1024 and 1026) at 0.5–1.5 mm galvanized and 0.5–1.2 mm stainless.
Stainless is the tighter figure on every model. Quote your stainless work from that lower number, never from the galvanized one.
Not "does it take a standard coil?" — coil handling decides how often your operator stops to reload. The Auto Duct Line 3 uses one electric decoiler including two 7T coils, and the published maximum roll material weight is 7000 kg.
Match that figure against the coil weights your steel supplier actually delivers, or the decoiler becomes a bottleneck rather than a buffer.
Not "is it fully automatic?" — automation is only meaningful if the sequence matches your duct geometry. The published workflow is: input the duct size, then the line automatically completes uncoiling, leveling, reinforcing, punching, square forming and shearing.
Bring a real duct size and flange drawing to the demonstration and ask the operator to run that exact job.
Not "does it do TDF?" — most shops need mixed work, not one profile all day. The manufacturer states the line is very suitable for mixed production of TDF common plate flanges, angle steel flanges and TDC flange air ducts.
Then ask separately about the optional functions, which determine whether your specific mix runs without manual re-work.
Optional functions are listed by the manufacturer as additions to the basic line. Confirm which ones are included in your specific quotation — availability is an order-level question, not a default.
Once the entity checks are done, selection narrows to two questions: how wide is the widest duct you build, and how thick is the heaviest galvanized sheet you run. Everything else in the published table — 15 m/min maximum feed speed, 7000 kg maximum roll weight and 9 kW total power — is identical across all four order codes. Decide on width and thickness first; then compare dimensions, because those change where the line physically fits.
TDF and angle flange work up to 1.2 mm galvanized on a 1250 mm board, with limited stainless. Shortest footprint of the family at 8200×1750×1500 mm and 3500 kg — the easiest fit where floor space is tight.
Same 1250 mm board width but the heavier thickness class, so you keep the narrow bay while running 1.5 mm galvanized. Expect a longer line and more mass: 9200×1750×1500 mm and 5500 kg.
For shops building wider duct from thinner material: 1500 mm board width at the lighter thickness class. Weight stays at 3500 kg but the frame widens to 2200 mm, so check bay width as well as length.
The widest and heaviest combination in the published set: 1500 mm board at 0.5–1.5 mm galvanized. At 6000 kg and 9200×2200×1500 mm it needs the largest bay, the strongest slab and the most room for coil infeed.
Scope is where quotes stop being comparable. Two suppliers can name the same machine and deliver very different things. For the Auto Duct Line 3, the manufacturer publishes a basic configuration — use that as your confirmed baseline, and treat everything outside it as an item to confirm in writing.
The manufacturer's basic configuration list covers equipment only. Commissioning, training and spare-part provisioning are not stated as included, so they belong on the RFQ as explicit line items — not as assumptions carried over from a conversation.
The machine price is one line in the total. The published parameter table already answers several site questions — use it to price the rest of the project honestly, then confirm the open items before the line ships.
| Cost or site item | What the published data tells you | What to confirm before shipping |
|---|---|---|
| Site power | All four ADL-L3 order codes are rated at 9 kW total power. | Voltage, phase and available capacity at your panel — and whether your supply matches the configuration offered. |
| Footprint and foundation | Dimensions range from 8200×1750×1500 mm to 9200×2200×1500 mm; machine weight ranges from 3500 kg to 6000 kg. | Bay length for coil infeed and duct outfeed, slab loading, and clear access for the decoiler and feeding device. |
| Coil versus sheet sourcing | Maximum roll material weight is 7000 kg, and the decoiler is supplied with two 7T coils. | Whether your steel arrives as coil or cut sheet — sheet-only sourcing changes the feeding economics of the whole layout. |
| Galvanized versus stainless throughput | Stainless is the tighter thickness range on every model (0.5–0.8 mm or 0.5–1.2 mm against 0.5–1.2 mm or 0.5–1.5 mm for galvanized). | Your stainless share of work, and how it will be scheduled against galvanized runs. |
| Consumables and wear parts | The line performs punching and shearing as part of the automated flow. | Blade and punch wear list, replacement intervals and local availability. |
| Freight and handling | Machine weight of 3500–6000 kg, plus the decoiler and feeding device. | Container loading plan, crane or forklift capacity at destination, and unloading responsibility. |
| Duties and documentation | Export documentation is a standard supplier discussion point, but terms vary by destination. | Documentation set, customs classification and duty estimate for your country. |
A supplier can only spec a line that fits your shop if you give them the numbers that drive the selection. Work through the list below, then send it in one message rather than across a week of back-and-forth.
Keep adjacent product options together for a faster catalog comparison.
Discover COORIG's SDM-1602, the ultimate spiral duct machine for sale. Perfect for high-quality spiral duct work and manufacturing.
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Main technical parameters: welding diameter Φ100~Φ1000mm; tin plated, galvanized, cold-rolled and stainless steel sheet; welding thickness 0.3~1.0mm (stainless 0.3~0.8mm).
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Mainly used for making pressure bars, connections, etc. for circular pipes. To roll thin plates into convex ribs of a certain shape, with the aim of strengthening the rigidity of sheet metal, pipes, or metal components.
View productWork through eight proofs: in-house machining of the frame and rollers, sample weld quality you can inspect, a named control system with a screen list, a test run on your own coil material and gauge, contactable installed-base references, export documentation matched to your site, a named service contact with a stated response time, and written warranty terms. A refusal on any one of the eight is a qualification failure, not a price negotiation.
The published table lists four order codes. The c12s08 models — order codes 1023 and 1025 — handle 0.5–1.2 mm galvanized sheet and 0.5–0.8 mm stainless steel. The c15s12 models — order codes 1024 and 1026 — handle 0.5–1.5 mm galvanized and 0.5–1.2 mm stainless steel. Maximum board width is 1250 mm on order codes 1023 and 1024, and 1500 mm on 1025 and 1026.
The published basic configuration is one electric decoiler including two 7t coils, one material feeding device, one main machine and one set of control system. Commissioning, operator training and spare-parts lists are not listed as part of that basic configuration, so they should be confirmed as separate written line items in your request for quotation.
Yes. The product page states the line is very suitable for mixed production of tdf common plate flanges, angle steel flanges and tdc flange air ducts. The manufacturer also lists optional functions including a middle support hole, a common tdf flange side hole and angle flange bending — confirm which of these are included in your specific order.
All four published adl-l3 models are rated at 9 kw total power, with a maximum feed speed of 15 m/min and a maximum roll material weight of 7000 kg. External dimensions range from 8200×1750×1500 mm to 9200×2200×1500 mm, and machine weight ranges from 3500 kg to 6000 kg depending on the order code. Allow additional space for coil infeed and duct outfeed.
Send your sheet material, thickness range per material, board width, flange mix, coil data, site dimensions and power supply through the contact page, or email susiy@coorig.com or call +86-186 2293 2326. Ask for optional tooling, commissioning, training and spare-part items to be confirmed in writing on the quotation so the scope is comparable with other offers.
