Two plants order the same model, run the same strip and sell into the same market. One gets a steady line, the other fights weld quality from the first week. The machine is rarely the difference — the workshop around it usually is.
These are the conditions worth checking before the line is built, not after it lands.
Start with the power supply
Motor size on the tables is the first number to carry into your electrical plan, and it varies far more than buyers expect.
The smart SS line runs from a 5.5×3 kW inverter arrangement at the small end to a dual-drive configuration on the YH-100.
The large-diameter line starts at 37×2 kW on the YH-100 and climbs from there with pipe size.
On the HF line the main motor and the high-frequency welder power are separate columns, and both increase with mill size — the 219 Mill alone shows a 250×2 kW main motor and 800 kW of HF power.
Give both columns — main drive and welder power — to your electrical contractor with the model you intend to buy, not with an average.
A line with a 250×2 kW main drive plus an 800 kW welder is a different substation conversation from one running a 45 kW drive.
Floor space is a range, not a figure
Footprint on the tables is listed as a rectangle because the same model can be built at different lengths.
On the laser line the range runs from about 23 × 1.25 m at the YH-40S end to roughly 45 × 4.3 m at the largest model.
On the decorative line it starts near 20 × 1.1 m at the YH-S40 and reaches about 36 × 4.0 m at the YH-90.
Plan for the top of the range for the model that covers your largest pipe. A layout that fits the bottom of the range and not the top is a line that cannot be upgraded to the size you already said you wanted.
Leave room for the strip, not just the mill
The machine footprint is the machine. Around it you still need the coil at the entry, the run-out table at the exit, and a path for a crane or forklift to move coils in and finished bundles out.
A line whose operator can reach the forming section but not change a forming roll without moving a pallet will lose hours every week.
When you send a workshop sketch with your inquiry, mark door widths and crane access on it. The layout drawing starts from your building rather than a template when it has those dimensions.
Strip handling sets the pace you can actually run
A plant that can only lift small coils will run short campaigns, and short campaigns mean more set-ups.
Several stations in the YH flows exist to smooth that rhythm — a strip accumulator on the smart and HF lines lets the line keep forming while a new coil is welded on, and the laser line carries its own seam treatment and sizing stages that need a steady strip supply to hold tolerance.
If your coil supply comes in mixed widths and gauges, say so in the inquiry. The forming-pass design and the roller set follow from the strip you will actually load, not from the widest coil you could theoretically buy.
Put it in writing in the inquiry
Four workshop facts shorten the engineering work more than any other paragraph you can write: available power (kVA and voltage), clear floor length and width, how coils arrive and what lifts them, and the door width the line has to pass through.
Add your pipe diameter and wall range and the first reply can be a layout that fits, rather than a model list that later gets revised.
The contact form takes the pipe specification; put the workshop facts in the message field. Engineers can then compare your building against the footprint range of the model they recommend before either side commits.