High-Pressure On-Line Double Block Test Plug

Double block weld tester engineered for live pipeline isolation and hydrostatic weld testing without full shutdown. Dual-seal and bleed system ensures a secure pressure barrier for safe operation under residual upstream pressure.

Application: 

• On-line weld isolation during live system modifications
• Hydrostatic testing of weld joints under residual pressure
• Oil, gas, and power pipelines requiring high-integrity isolation

Key Feature:

• Dual-seal “double block” design with integrated bleed port.
• Safe isolation under upstream pressure.
• Allows upstream monitoring and gas purging.
• Reduces test volume and water usage.

Size: 1/2" up to 48"

Pressure: up to 2250psi