The Rosemount 3415 is a premier dual-configuration gas flow meter designed to tackle the industry’s toughest challenge: measurement drift caused by pipeline contamination. By combining a field-proven 4-path British Gas-design chordal meter (certified to OIML R137 Class 0.5) with an independent 1-path reflective check meter, it provides continuous verification of fiscal measurement data. This "4+1" setup is essential for reducing LAUF gas and ensuring billing integrity at critical custody transfer points.
The standout feature of the 3415 is its sensitive 30° single reflective check path. This path is specifically tuned to detect pipeline wall buildup (fouling) as it happens, allowing operators to schedule pigging or cleaning before accuracy is compromised. Powered by ultra-fast 3410 Series Electronics, the meter generates rich predictive diagnostics via MeterLink™ Software, offering a 3D view of the flow profile to identify swirl, crossflow, and turbulence instantly.
| Feature | Specification Details |
| Line Sizes | DN100 to DN600 (4-in to 24-in) |
| Accuracy (4-Path) | ±0.1% of reading over entire calibration range |
| Accuracy (1-Path) | ±0.2% (Calibrated); ±1.5% (Uncalibrated) |
| Path Configuration | 4-Path Chordal (Fiscal) + 1-Path Reflective (Check) |
| Fluid Type | Natural Gas, Fuel Gas, Process Gas |
| Operating Pressure | Up to 27,579 kPag (4,000 psig) |
| Calculations | Automatic AGA 8 (Compressibility) & AGA 10 (SOS) |
| Electronics | Rosemount 3410 Series with Type 4 CPU Module |
The Rosemount 3415 is specifically engineered for shale gas and dirty gas applications where internal pipe buildup is common. It is the ideal choice for:
Custody Transfer Interconnects: Where verifying the health of the primary meter is a contractual requirement.
Fuel Gas Lines: Monitoring buildup from compressor oil carryover.
Offshore Pipelines: Detecting early-stage hydrate formation on pipe walls.
When selecting your Rosemount 3415, the transducer choice is critical for longevity. Use the T-21 for standard process conditions, but specify the T-22 or T-41 for low-temperature environments down to -50°C. If your facility requires even higher redundancy for liquids, consider standardizing with the [Rosemount 3416 4+2 Meter] or explore our [Liquid Ultrasonic Flow Meters] for hydrocarbon custody transfer.
The 3415 is a "two-in-one" solution that fits into a single meter run, saving significant footprint.
Installation: Ensure the meter is oriented correctly to allow the reflective path to accurately scan the internal pipe surface.
I/O Integration: Leverage the Type 4 CPU Module, which supports up to six frequency or digital outputs. To achieve full mass flow compensation, the 3415 can be seamlessly integrated with a high-precision [Rosemount 3051S Pressure Transmitter] to monitor real-time process pressure.
Verification: Use the integrated Smart Meter Verification Basic feature to perform health checks while the meter is live, avoiding unnecessary laboratory recalibrations.
Q: What is the primary operational advantage of the 4+1 dual-configuration?
A: The 4+1 design integrates a 4-path British Gas-design fiscal meter and a 1-path reflective check meter in a single body. This provides independent redundant verification of flow data and enables real-time detection of pipeline wall buildup (fouling), ensuring long-term measurement stability without a second meter run.
Q: How does the Rosemount 3415 detect pipeline wall buildup (fouling)?
A: It utilizes a sensitive 30° single reflective check path. This path is specifically designed to monitor changes in the internal pipe surface. If buildup from compressor oil or hydrates occurs, the diagnostics alert operators immediately via MeterLink™ Software.
Q: Can the 3415 automate AGA 8 and AGA 10 calculations?
A: Yes. The advanced 3410 Series Electronics automatically calculate AGA 8 Compressibility and AGA 10 Speed of Sound. This reduces manual data analysis and helps in identifying deviating gas quality in real time.
