In industrial instrumentation, many failures don’t come from the instrument itself.
👉 They come from the wrong connection method.
A poor connection choice can lead to:
- Leakage → unplanned shutdown
- Signal instability → inaccurate readings
- Frequent maintenance → higher costs
- In worst cases → safety incidents
👉 The connection is not just mechanical — it directly affects your process reliability
⚠️ Why Connection Method Matters More Than You Think
Whether you are installing:
- Flowmeters
- Pressure transmitters
- Level instruments
👉 The connection determines:
- Sealing performance
- Pressure resistance
- Installation stability
- Long-term maintenance cost
Yet in many projects, connection selection is often underestimated.
🔍 Flange Connection — Best for High Pressure & Large Size
Flange connections are the most reliable solution for:
- Large pipe sizes (DN50 and above)
- High pressure applications
- High temperature conditions
Advantages:
- Strong sealing with gasket
- Easy disassembly for maintenance
- Suitable for critical processes
👉 Typical applications:
- Electromagnetic flowmeters
- Vortex flowmeters
- Large size level instruments
⚠️ Common mistake:
Using low-quality or wrong gasket → leads to leakage under temperature/pressure
🔧 Thread Connection — Simple but Easy to Get Wrong
Thread connections are widely used for:
- Small instruments
- Pressure transmitters
- Temperature sensors
Advantages:
- Low cost
- Easy installation
- Compact structure
👉 But also the most misused
⚠️ Critical warning:
👉 NPT and BSP (PT/G) are NOT interchangeable
Wrong combination can cause:
- Leakage
- Damaged threads
- Instrument failure
⚙️ Compression Fitting — The Best Choice for Instrument Tubing
Compression fittings are ideal for:
- Impulse lines
- Sampling systems
- Gas and pneumatic lines
Advantages:
- High sealing reliability
- Suitable for precision tubing
- Clean and compact installation
👉 Widely used with:
- Differential pressure transmitters
- Analyzer systems
⚠️ Installation is critical:
- Tube must be fully inserted
- Tightening must follow standard turns (e.g. 1¼ turns)
- Over-tightening damages the tube
📊 Quick Selection Guide (Save Your Time)
When choosing connection type:
👉 Check pipe size:
- Large diameter → Flange
- Small instrument port → Thread
- Tubing system → Compression
👉 Check working conditions:
- High pressure / high temp → Flange
- General purpose → Thread
- Precision / gas system → Compression
👉 Check medium:
- Hazardous / critical → prioritize sealing reliability
- Normal service → choose cost-effective option
🚨 What We See in Real Projects
From real field experience, common problems include:
- Wrong flange gasket selection
- Mixed thread standards (NPT vs BSP)
- Poor compression fitting installation
- Mismatch between instrument and pipeline
👉 These issues are often discovered only after leakage or failure happens
🚀 How We Help You Avoid These Problems
We don’t just supply instruments — we ensure they fit your system correctly.
We provide:
- Proper connection selection based on your application
- Flange standard matching (ANSI / DIN / JIS)
- Customized threads and adapters
- Complete instrument + connection solution
- Technical guidance for installation
👉 Result:
- No leakage risk
- Faster installation
- Long-term stable operation
📩 Not Sure Which Connection to Choose?
Just send us:
- Medium
- Pipe size
- Pressure & temperature
- Installation environment
We will recommend the most reliable and cost-effective solution for your project.