Double Block and Bleed Test / Isolation Plug

Safe and Effective Pipeline Pressure Testing 

Positively isolate and monitor potentially explosive vapors during hot work, then effectively hydrotest the new weld connection with EST Group’s Double Block and Bleed Isolation Plug. The dual port design creates a positive pressure barrier between the seals - safely isolating hot work from any residual upstream gases.

Lightweight aluminum/steel construction makes our pipe isolation plug easy to maneuver, often-allowing operators to forego the use of lifting devices or cranes, which can be in high demand during turnarounds.

Our 8” schedule 80 Double Block and Bleed Isolation Plug weighs in at just 36lbs (16.3kg) compared to other plugs weighing in excess of 100lbs (45.4kg) of the same size!

Test Pressure

  • 2250 PsiG (155 BarG)
  • Upstream pressure rated to 10 PsiG (0.7 BarG) - higher pressures available upon request

Size Range 3/4” to 48” NPS (DN20 to DN1200) - larger sizes available upon request

Standard Seal Material Urethane - alternative materials available upon request

Features & Benefits

  • Monitor potentially explosive vapors during hot work
  • Dual port system allows water to be circulated between seals, providing improved cooling during pre/post weld procedures
  • Uses less than a gallon (3.8L) of test media – cutting down on fill times and reducing waste/treatment expenses.
  • ASME PCC-2 Type IV Testing Device*



In need of a high-pressure isolation plug? Check out our GripTight Isolation Plug

*ASME PCC-2 (Article 503) - “Test Devices for Localized Pressure or Tightness Testing of Welded Repairs