FlowMaster
DBB Orifice Fitting
The FlowMaster Double Block and Bleed (DBB) Orifice Fitting is designed for safe, efficient inspection and replacement of orifice plates without depressurizing the pipeline.
Building on the proven Dual Chamber design, the DBB adds an intermediate chamber for double isolation, enabling maintenance under live flow conditions with maximum safety. This makes it ideal for high-pressure custody transfer and continuous process measurement applications.
- Double isolation system for enhanced operator safety
- Intermediate chamber for safe orifice plate inspection
- Pressure identification via integrated gauges
- Orifice plate replacement without interrupting flow
- Reduced downtime and operating costs
- Meets ISO 5167 and API MPMS 14.3.2 (AGA Report No.3) standards
- Suitable for high-pressure natural gas, petrochemical, and utility systems
Sizes
DN 2” to DN 24”
Pressure Classes
ANSI 150, 300, 600, 900, 1500, 2500, up to 10,000 PSI
Standards
ISO 5167, API MPMS 14.3.2 (AGA Report No.3)
Materials
Carbon Steel, Stainless Steel, Duplex, custom alloys available
Applications Media
Gas, liquid hydrocarbons, steam, and process fluids
- ️ Oil & Gas – Custody transfer and transmission pipelines
- Chemical & Petrochemical – High-pressure process measurement
- Power Generation – Steam and utility flows requiring continuous operation
- Water & Wastewater – Secure monitoring in pressurized lines
- Industrial Utilities – High-pressure distribution with no downtime
