Double Block And Bleed Test / Isolation Plug

Double Block And Bleed Test / Isolation Plug
Product ID #

DBB

Lightweight|Aluminum & Steel|Highly Portable

The Double Block and Bleed (DBB) plug enables you to positively isolate and monitor potentially explosive vapours during “hot work”, then effectively hydrotest the new weld connection with one easy to use tool.

The aluminium/steel construction makes the tool highly portable, and easy to position.

The volume of water required for a test is so small that testing can be accomplished using a hand pump.

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Product Specifications

  • After determining pipe and schedule size, install DBB upstream of “hot work” area
  • Expand seals by tightening compression nuts, Inject inert gas or water between seals (isolation zone) and pressurize, Monitor isolation zone pressure during “hot work”, After weld cools, release pressure and seal, reposition the plug’s isolation zone over weld area, Pressurize isolation zone

Double Block And Bleed Test / Isolation Plug

Application Range

Size Range: from 0.34mm to 10.88mm (DN20 - DN600), Size Range: from 0.34mm to 10.88mm (DN20 - DN600)

Pressure Rating

Test pressures to 2250 PsiG (155 BarG) between the seals

Standard Materials

Urethane – alternative materials available upon request

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Double Block And Bleed Test / Isolation Plug

Double Block And Bleed Test / Isolation Plug
Product ID

DBB

Lightweight|Aluminum & Steel|Highly Portable