Hydrostatic Test &
Isolation Plugs
Curtiss Wright EST Flange Test Plugs, cited in ASME PCC2 Article 501, are the industry’s top choice for Flange Tie-In Testing. They eliminate the need for full system hydro tests by offering both axial and hoop stress testing, which sets them apart from competitors. The high-pressure isolation plugs also provide a safe, engineered barrier for welding, ensuring maximum protection during pipeline operations. Their dual functionality and compliance with industry standards make them a reliable and efficient solution for pressure testing and isolation needs
Perform Flange-To-Pipe
Weld Testing
GripTight Reverse Pressure Test Plug- PCC2 Type 1 Flange Test Plug
Eliminate concerns over inadequate joint strength when pressure testing welded flange connections. The plug and test flange act independently of each other so that the weld joint is subjected to real world stresses during pressure testing Flange to pipe welds are tested without needing to pressurize the entire system Available for pipe sizes ranging from 2″ to 12″ (DN50 – DN300). Larger sizes available upon request.
High Lift Flange Weld Test Plug - PCC2 Type 3 Flange Test Plug
High Lift Flange Weld Test Plugs allow you to monitor upstream conditions, isolate and purge the weld area, perform the weld, and hydro test weld joint to ANSI B16.5 requirements using only one tool
Size Range: 3/4″ – 24” NPS (DN20 to DN600) Flange classes 150# to 600# Higher flange classes available upon request
Isolate and Test
Flange Connections
Double Block and Bleed Isolation Plug - PCC2 Type 4 Test Plug
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. In addition, the volume of water required for a test is so small that testing can be accomplished using a hand pump.
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
GripTight Isolation Plug –
PCC2 Type 4 Test Plug
EST Group’s GripTight® Isolation Plug is the safest Isolation Plug on the market. It allows you to isolate and monitor potentially explosive vapors during hot work, then hydro-test new weld connections.
2250 PsiG (155 BarG) between the seals
Upstream pressures up to 1500 PsiG (103 BarG) - higher pressures available upon request
If the upstream pressure increases, then the GripTight Grippers actually use the pressure to increase their grip on the pipe. The greater the pressure, the greater the grip!
Size Range 3/4” to 48” NPS (DN20 to DN1200) - larger sizes available upon request
Open-End
Test Plugs
GripTight MAX® Test Plug
Test plugs are temporary end closures that simplify pressure testing piping systems, pipe spools, pipe racks or pressure vessels.Test Plugs are reusable – provide lowest cost per test. Test Plugs Eliminate 80% of time spent welding-on and cutting-off end caps. Eliminates the time consuming process of pre-heat, post weld stress relieving re-beveling the pipe.Significantly reduces the cost per test
Test Pressure Up to 15,000 PsiG (1,034 BarG) – higher pressures available upon request
Size Range 3/8” to 48” NPS (DN10 to DN1200) – custom sizes available upon reques
GripTight MAX® Test Plug
GripTight® Elbow Test Plug Reduce material and labor costs when pressure testing pipe spools and piping systems terminating in long radius elbows with EST Group’s GripTight Elbow
Test Plug Test Pressure 3,350 PsiG (231 BarG) – higher pressures available upon request
Size Range 2” to 48” (DN50 to DN1200) – larger sizes available upon request
