Pipe Joining and Welding Clamps
Hold pipe and fittings together for tack welding. These clamps can be used to join or weld two pipes of similar or different diameters, or they can be used to join a pipe to a flange. With a rugged build, they’re designed for use with heavy pipe.
External clamps work well when you can’t access the inside of your pipe. However, you may need to rotate them during welding to move them out of the way.
Internal clamps don’t obstruct joining or welding, making the process faster and simpler. One side of these two-part clamps expands with a knob while the other expands with a hand bar, so you can set them at different diameters to join pipe and flanges of varying sizes.
Clamps with thumb screws hold fittings or flanges at three separate points—adjust them manually to center the two pieces being joined.
Self-centering clamps consist of two clamps that share a center line even as you attach each to a different piece of pipe, so the pipes stay aligned with no manual adjustment needed.
For Pipe | ||||
|---|---|---|---|---|
| OD | Size | Body Material | Each | |
External Clamp—Thumb Screws | ||||
| 1"-2 1/2" | 3/4-2 | Steel | 0000000 | 0000000 |
| 2"-6" | 2-5 | Steel | 0000000 | 000000 |
| 5"-12" | 5-10 | Steel | 0000000 | 000000 |
External Clamp—Self-Centering | ||||
| 1/8"-3" | 1/8-2 1/2 | Stainless Steel | 0000000 | 000000 |
| 1 1/2"-5" | 1 1/4-4 | Stainless Steel | 0000000 | 000000 |
Internal Clamp—Self-Centering | ||||
| 2"-6" | 2-5 | Stainless Steel | 0000000 | 000000 |
| 4"-8" | 3 1/2-7 | Stainless Steel | 0000000 | 000000 |
| 6"-14" | 6-14 | Stainless Steel | 0000000 | 000000 |
Heavy Duty Chain Clamps for Pipe Joining and Welding
The open clamp design permits welding around almost the entire pipe circumference. Secure components with chains and tighten the handles.
Aluminum clamps are lighter in weight than iron clamps. Iron clamps are more durable than aluminum.
Straight clamps are for use with two lengths of straight pipe and with reducers. Flange clamp is for flanges and straight pipe. Adjustable clamp is for use with straight pipe, elbows, tees, reducers, and risers. It pivots on a hinge to hold components at any angle from 90° to 180°.