G Type Expander Tube
Expander for pipeline diameter expansion installation, five structures GA/GB/GC/GD/GE, threaded, flanged and welded versions, suitable for DN15~DN80 pipelines.
- Original Factory Genuine, Tenfold Compensation for Counterfeits
- Full Machine Warranty, Lifetime Maintenance
- In Stock, Shipped on the Same Day
The G type expansion tube is used for temperature measurement with expanded diameter installation on small-diameter pipes: a hole is cut in the pipe and the expansion tube is welded on to form a local expanded-diameter zone, giving the thermowell sufficient insertion depth without affecting media flow. Five structures are available: GA straight thread, GB tapered thread, GC tapered weld, GD straight flange, and GE tapered flange. Expansion tube specifications are DN80 (Φ89×6) and DN100 (Φ108×8), suitable for DN15~DN80, Series I and Series II pipes; the hole size is 1 mm larger than the user's pipe outer diameter.
| Parameter Name | Technical Specifications |
|---|---|
| Structure type | |
| Design | A straight thread / B tapered thread / C tapered weld / D straight flange / E tapered flange |
| Expansion tube specifications | DN80 (Φ89×6) / DN100 (Φ108×8) |
| Mounting seat height H | Type A 60/80/100/120; Type B 60/80/100/120/140; Type D/E 100/150/200; Type C unmarked (mm) |
| Connection thread | M20×1.5 / M27×2 / M33×2 / NPT1/2"~1" (internal thread) |
| Flange connection | Standard code - nominal diameter - pressure - sealing face - flange type - material code |
| Applicable pipes and materials | |
| Nominal pipe diameter | DN15 ~ DN80 (Series I / Series II) |
| Applicable pressure | Type A/D ≤4.0 MPa; Type B/C/E ≤6.3 MPa |
| Material | 304(A) / 316L(HL) / 20#(ZA) |
| Applicable temperature | 304 ≤300℃; 316L ≤300℃; 20# ≤400℃ |
| Hole size | ΦB = user pipe outer diameter + 1 mm |
- Expanded diameter on small pipes to create a temperature measurement point with sufficient insertion depth
- Five structures A/B/C/D/E covering threaded, flanged and welded installation
- Compatible with DN15~DN80, Series I and Series II pipes
- Expanded pipe sizes DN80 / DN100, selected according to flow rate and insertion depth
- Hole size enlarged by 1 mm relative to pipe outer diameter, drilled on site
- GA/GB supplied with threaded protection tube; GC supplied only with BH01 welded protection tube
Temperature measurement retrofit for small chemical pipes
GA type expanded pipe welded onto DN25 process pipe, fitted with M27×2 threaded protection tube to achieve sufficient insertion depth.
Temperature measurement on small-bore pipes in power plants
GB conical expanded pipe used on small-bore feedwater and condensate pipes, with 316L material for corrosion resistance.
Need selection advice or bulk quotation?
Send us the working condition parameters (signal type, medium, range, pressure, temperature, connection method), and our engineers will provide a selection scheme and quotation within 1 working day.
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