Having a problem understanding what you are trying to do. Heat a piece of tubing?

First if you want efficient power delivery to your heater, you will need high resistance wire (Nichrome) for the heater part, and low resistance wire (copper) for the feed wires from the battery.

Next...you did ensure that the wire is insulated from the tubing, didn't you?

If you are trying to use the tubing as a heating element...if you have a 12V source and you are heating stainless steel, you will need a very long length of very thin tubing to provide a suitable load. V=iR, and 25 amps means that you will need greater than 0.5 ohms of load (and it would be better to have lots more). You can't measure this with an ordinary meter, you need a 4-wire ohmmeter, or a current source and a voltmeter with mV or uV ranges.

Tube Cuts Made Easy - a Cutting-edge Technology

Dynasties fall, empires break, seasons pass—but one thing that never ends is mankind’s technological progress. To prove it one more time and this time, with remarkable prospects, laser tube processing has come to make things easier for the tube-cutting industry. Laser cuts being a reality now, production efforts have sharply shrunk to a minimum of 50%; and quality has spiked like never before.

Who would want to rely on high-frequency systems or flying cutoff machines to cut tubes and pipes anymore, when the same job is done faster and better with lasers? Now that doesn’t await an answer of course. For, the arrival of lasers has changed the face of tube fabrication. The flexibility of laser application has enhanced tube-cutting production both in quality and quantity, and with a speed much higher than what would have been possible in other manual processes.

Using lasers to cut tubes and pipes has been a practice since the 1970s; but, today it is being applied to many other manufacturing processes. As demand grew, manual processes fell short of meeting expectations, thereby giving way to laser cutting systems. Designs and techniques, which seemed an impossibility, are now being created on a dedicated tube processing laser.

Here’s how lasers make it bold and brilliant:

The First Cut

Laser tube cutting allows amazing accuracy, with hardly any tool wear. It also allows cuts without any burr, dross, or contamination, thus making these proper for a clean surface inside the tube and producing hygienic pipe & fittings. You may also adjust your cut length on the fly with lasers.

Connection’s a Joy

Nothing manual, no tool wear and zero grinding. But you end up having the perfect angles and arcs for tube-to-tube fitting. That’s the joy in laser connections—you get the best angled cutoffs and coped cuts. Same holds true for the hole cutouts—force-free laser cuts also produce flawless holes for tubes and pipes.

Laser cutting helps in locking tube connections too—both temporarily and permanently, as needed. It strengthens the connections, thus eliminating welding needs.

A Structure Unseen

Lasers help in adding through-tube projections to structural designs without any multiple setups. Everything’s completed in one operation. If that sounds magic, see it and believe it.

Other Laser Magic Works

Some other fascinating uses of the laser cutting technology are in the production of flow-type joints, hand bend preparations, odd shapes and complex designs like the C-channels, D-tubes, extrusions, bar stock, elliptical tubes, etc.

New Possibilities

Possibilities are plenty when we’re talking laser! It’s hard to gauge how much the laser technology can provide. The superbly interlocked U-joint and the complexly structured perforating gun of the oil industry are laser technology marvels in their own rights. The stainless laser tube cutting also bears newer possibilities in the days to come. Therefore, growth is infinite; and with lasers, it’s just the beginning.

About the Author

Wain Roy is an internet marketing professional expert in various industries like real estate, web design, finance, medical tourism, Canadian pharmacy drug and Optima Stainless