Weld Test/Isolation Plug
MID Industrial Tools Inc. offers one of the only hydraulically operated weld test/isolation plugs sold in North America. Our user-friendly plugs provide compatibility with different pipe sizes and materials. Achieve endless capabilities with isolation for pipe testing, maintenance or repairs today — both industrial tools rental and purchase options are available to suit your project needs.
- Size ranges from 4 inches to 16 inches
- Suitable for horizontal, vertical and inclined piping
- Hydraulically actuated
Achieve Outstanding Operational Performance
Experience the power of precision with our hydraulically operated weld test and isolation plugs.
Compatible with a wide range of pipe sizes and orientations, they’re ideal for safe, efficient pipe testing, maintenance, and repairs.
Upgrade your pipe testing and maintenance operations with MID Industrial Tools’ hydraulically operated isolation plugs. Whether you’re working on new welds, conducting repairs, or isolating sections for maintenance, our plugs provide a reliable seal without the need to pressurize the entire system.
- Minimized pressure test volume, reducing the risk and improving efficiency
- Reduced downtime, allowing you to complete work faster and safer
- Focused testing on new welds, saving time and material costs
- Quick installation, with verified vapor barriers in minutes
- Leak detection capability, helping verify weld integrity and pipeline section isolation

Model | Unit of Measure | Working Range | A | B | C | Machine Weight |
---|---|---|---|---|---|---|
CS6 | Std. - in. | 2" - 6" | 7.28 | 20.16 | 7.56 | 91.3 lbs |
Metric - mm | 50 - 168 | 185.0 | 512.0 | 192.0 | 41.5kg | |
CS8 | Std. - in. | 2" - 8" | 9.29 | 22.2 | 7.56 | 93.5 lbs |
Metric - mm | 50 - 230 | 236.0 | 564.0 | 192.0 | 42.5 kg | |
CS10 | Std. - in. | 4" - 10" | 11.14 | 24.09 | 7.56 | 97.9 lbs |
Metric - mm | 114 - 275 | 283.0 | 612.0 | 192.0 | 44.5 kg | |
CS12 | Std. - in. | 6" - 12" | 13.15 | 26.18 | 7.56 | 116.6 lbs |
Metric - mm | 168 - 325 | 334.0 | 665.0 | 192.0 | 53 kg | |
CS14 | Std. - in. | 8" - 14" | 15.2 | 28.31 | 7.56 | 123.2 lbs |
Metric - mm | 219 - 377 | 386.0 | 719.0 | 192.0 | 56 kg | |
CS16 | Std. - in. | 10" - 16" | 17.24 | 30.55 | 7.68 | 132 lbs |
Metric - mm | 273 - 426 | 438.0 | 776.0 | 195.0 | 60 kg | |
CS18 | Std. - in. | 12" - 18" | 18.46 | 31.77 | 7.68 | 144.1 lbs |
Metric - mm | 300 - 457 | 469.0 | 807.0 | 195.0 | 65.5kg | |
CS20 | Std. - in. | 14" - 20" | 20.43 | 33.94 | 7.68 | 169.4 lbs |
Metric - mm | 355 - 508 | 519.0 | 862.0 | 195.0 | 77 kg | |
CS22 | Std. - in. | 16" - 22" | 22.44 | 35.83 | 7.68 | 172.8 lbs |
Metric - mm | 400 - 560 | 570.0 | 910.0 | 195.0 | 79 kg | |
CS24 | Std. - in. | 18" - 24" | 24.33 | 37.8 | 7.68 | 187 lbs |
Metric - mm | 457 - 610 | 618.0 | 960.0 | 195.0 | 85 kg | |
CS26 | Std. - in. | 20" - 26" | 26.38 | 40.16 | 7.68 | 211.2 lbs |
Metric - mm | 508 - 660 | 670.0 | 1020.0 | 195.0 | 96 kg | |
CS28 | Std. - in. | 22" - 28" | 28.31 | 42.68 | 7.8 | 250.8 lbs |
Metric - mm | 550 - 715 | 719.0 | 1084.0 | 198.0 | 114 kg | |
CS30 | Std. - in. | 24" - 30" | 30.31 | 44.65 | 7.8 | 255.2 lbs |
Metric - mm | 600 - 762 | 770.0 | 1134.0 | 198.0 | 116 kg | |
CS32 | Std. - in. | 26" - 32" | 32.68 | 47.01 | 8.15 | 265.1 lbs |
Metric - mm | 660 - 813 | 830.0 | 1194.0 | 207.0 | 120.5 kg | |
CS36 | Std. - in. | 30" - 36" | 36.38 | 51.02 | 8.43 | 317.9 lbs |
Metric - mm | 762 - 914 | 924.0 | 1296.0 | 214.0 | 144.5 kg | |
CS42 | Std. - in. | 36" - 42" | 42.4 | 57.8 | 8.5 | 434.5 lbs |
Metric - mm | 914 - 1066 | 1077.0 | 1468.0 | 216.0 | 197.5 kg | |
CS48 | Std. - in. | 42" - 48" | 49.13 | 64.8 | 8.5 | 536.8 lbs |
Metric - mm | 1066 - 1230 | 1248.0 | 1646.0 | 216.0 | 244 kg |

We stock hydraulic isolation plugs in standard sizes from 4 to 16 inches, ready for quick delivery.
Need a different size? We’ll source it for you—starting as small as 0.5 inches—through our trusted industry partners. All plugs are designed for horizontal, vertical, or inclined pipes and install in minutes for immediate use.