Saturday, March 29, 2014
How to Cut Stainless Tubing Straight
When cutting stainless steel tubing, you must ensure that the cut end of the stainless tubing is straight. If the cut is crooked, the end that you cut will not fit squarely into a stainless steel fitting or butt up tight to another piece of pipe for a weld joint. The tools required to mark a straight cut on the stainless steel tubing are relatively simple, readily available and inexpensive. Selecting the proper tool to cut the squarely marked tubing is vital to ensuring that the cut is straight.
Instructions
- 1
Stretch the tape measure along the stainless steel tubing and mark the length you need to cut with a permanent marker.
2Place the marked length of tubing into a table-mounted vise. Slide the length mark 12 inches past the end of the vise and turn the handle of the vise clockwise to secure the tubing.
3Fold an 8 1/2-inch by 11-inch piece of paper into a two-inch-wide strip that is 11 inches long.
4Align one side of the folded paper with the length mark you placed on the stainless steel tubing. Wrap the paper around the tubing and pinch the ends of the paper together. When the edges of the folded paper are even, the paper line is straight.
5Run the permanent marker around the edge of the folded paper, marking a straight line around the stainless steel tubing. Remove the paper from the tubing.
6Attach a .032 abrasive cut-off wheel to a four-inch grinder.
7Put on your safety glasses, face shield and leather work gloves.
8Cut 1/4 of the circumference of the stainless steel tubing, pressing the cutting wheel slowly along the cut mark.
9Loosen the table vise, spin the tubing 1/4 of a turn and tighten the vise. Continue cutting the tubing.
10Replace the abrasive cut-off wheel when it wears to the cutting line, or roughly 60 percent of the cut-off wheels original diameter.
11Complete the cutting process and set the grinder aside. Run a fine-tooth half-round file around the inside and outside of the cut to remove sharp burrs left by the cutting wheel.
Saturday, October 19, 2013
How to Weld Thin Wall Tubing
Thin walled exhaust tubing can be difficult to weld, but choosing the correct welding process will make the task less daunting. Each welding process will weld thin walled tubing. Tungsten inert gas (TIG) welding is the easiest way to weld thin walled tubing, but unless you have experience with TIG or gas welding, the learning process can be time consuming. MIG, although harder to set up, is readily available and has less of a learning curve than TIG welding.
Instructions
- 1
Put on your safety glasses and leather gloves.
2Spool the MIG welder with the .023 diameter welding wire. Using a lighter welding wire, reduces the amount of heat require to melt the wire electrode and will lower your chances of blowing through the thinned wall tubing. Connect the bottle of shielding gas to the welder to finish setting-up the MIG welder.
3Turn on the welding machine. Read the welding machine guide to determine a starting point for the welders amperage and wire speed. Connect the ground cable to the worktable. If your work table is non-conductive, wood for example, clamp the ground onto one end of the thinned walled tubing.
4Put on the welding hood.
5Place the pieces of thin walled tubing together. Ensure that the pieces fit together tight. Do not leave a weld gap between the pieces of tubing.
6Align the wire from the tip of the MIG gun with the tubing joint. Flick your head down to lower your welding hood. Depress the trigger of the MIG gun to create a tack to hold the tubing together. Place additional, evenly spaced tack welds around the connection.
7Place the hand that is holding the MIG gun in a comfortable position, with the MIG wire aiming at the weld joint. Steady your welding hand, with your free hand. Allow yourself ample room to move both of your hands around the accessible section of the weld joint.
8Flick your head down to lower your welding hood and depress the MIG guns trigger. Pull the MIG wire straight away from the weld puddle 1/8th of an inch. Stop and allow the weld puddle to catch up to your location. When the weld puddles reaches your location, move the MIG gun another 1/8th of an inch. Repeat the process until the joint of the pipe is welded solid. If you blow through the thin walled tubing, stop welding. Let the weld joint cool, and place tacks around the hole. Build the tacks until you fill the hole.
9Allow the weld joint to cool before handling.