Inclinometer Casings
Flushed ABS Inclinometer Casing
GT-ABS-01 is the flushed type ABS inclinometer casing at OD 70 mm, supplied in 3 m lengths with a slim 73 mm coupling at 3 mm wall and 15 cm length. The smaller coupling outer diameter keeps the annulus tight in a drilled hole where a standard 76 mm coupling would not pass. OD 85 mm is also available.
ISO 9001:2015 production Samples available Small orders accepted
Product Overview
GT-ABS-01 is the flushed type ABS inclinometer casing at OD 70 mm, supplied in 3 m lengths with a slim 73 mm coupling at 3 mm wall and 15 cm length. The smaller coupling outer diameter keeps the annulus tight in a drilled hole where a standard 76 mm coupling would not pass. OD 85 mm is also available.
Materials
- ABS
Key Benefits
- Coupling OD of only 73 mm, 3 mm larger than the casing, for tight boreholes
- Same groove geometry and straightness limits as the standard casing
- Heat deflection temperature of at least 97 degrees C
- 3 m lengths reduce the number of joints in a deep hole
- OD 85 mm available for larger installations
Application Scenarios And Who It Is For
Application Scenarios
- Boreholes drilled to a tight diameter where annulus is limited
- Deep holes where joints must not catch on the borehole wall
- Slope and excavation monitoring installations
- Installations grouted in place with a narrow annulus
Who It Is For
- Drilling contractors working to a fixed hole diameter
- Monitoring contractors installing into cased or collapsing ground
- Consultants specifying flush coupled casing
- Instrumentation distributors
Problems It Solves
- Standard couplings hanging up on the borehole wall during installation
- Over-drilling a hole purely to accommodate coupling diameter
- Grout channels blocked by an oversized coupling
- Joint count in deep holes adding cumulative survey error
Technical Features
- Flush type coupling at OD 73 plus minus 1.0 mm, wall 3 plus minus 0.5 mm, length 15 plus minus 0.5 cm
- Casing OD 70 plus minus 1.0 mm with 5 mm wall
- Guide groove 5 plus minus 0.5 mm wide and 2 plus minus 0.2 mm deep
- Bending 1.0 per mille or less and torsion 0.2 degrees per metre or less
- Intensity strength at least 1200 N/100m
Specifications
Values below are taken from our published product data. Our tables note that figures are general averages for reference and that actual data should be confirmed by testing within the applicable scope.
| Casing OD | 70 plus minus 1.0 mm |
|---|---|
| Casing Wall Thickness | 5 plus minus 0.5 mm |
| Guide Groove Width | 5 plus minus 0.5 mm |
| Guide Groove Depth | 2 plus minus 0.2 mm |
| Bending | 1.0 per mille or less |
| Torsion Angle | 0.2 degrees per metre or less |
| Radian | 0.4 mm or less |
| Intensity Strength | at least 1200 N/100m |
| Heat Deflection Temperature | at least 97 degrees C |
| Casing Length | 3 m |
| Coupling OD | 73 plus minus 1.0 mm |
| Coupling Wall Thickness | 3 plus minus 0.5 mm |
| Coupling Length | 15 plus minus 0.5 cm |
| Coupling Bending | 1.0 per mille or less |
| Coupling Intensity Strength | at least 1200 N/100m |
| Coupling Heat Deflection Temperature | at least 97 degrees C |
| Other Diameters | OD 85 mm also available |
Quality Control
- Outer diameter held to plus minus 1.0 mm on casing and to the stated tolerance on couplings
- Groove width and depth checked so probe wheels track without binding
- Bending, torsion angle and radian measured on production lengths
- Intensity strength and heat deflection temperature verified against the published limits
Customization Options
- OD 85 mm version
- Caps, protection boxes and couplings
- Length and quantity scheduling for a drilling programme
Comparison With Other Products
| Compared With | Why This Product |
|---|---|
| Standard ABS Inclinometer Casing | The flushed coupling is 73 mm instead of 76 mm, which matters when the borehole annulus is tight |
| Aluminium casing | ABS suits most ground; aluminium is chosen where higher stiffness is required |
Use Guide
- Check groove alignment between lengths before lowering the string into the hole
- Join lengths with the matching couplings and seal against grout ingress
- Set one groove pair along the expected direction of movement and record the orientation
- Fit top and bottom caps, and a protection box where the casing head is exposed
Questions Buyers Ask
Flushed ABS Inclinometer Casing FAQ
Why choose the flushed type
Its coupling is OD 73 mm against 76 mm on the standard casing, so the string passes through a tighter borehole annulus.
What tolerance do you hold on the casing
OD 70 plus minus 1.0 mm, wall thickness 5 plus minus 0.5 mm, groove width 5 plus minus 0.5 mm and groove depth 2 plus minus 0.2 mm.
How straight is the casing
Bending is 1.0 per mille or less, torsion angle 0.2 degrees per metre or less and radian 0.4 mm or less.
What is the production capacity
Two extrusion lines can produce tens of thousands of metres of casing or pipe each day, so long orders do not wait behind short ones.
Is the quality system certified
The company is approved to ISO 9001:2015, which keeps casing production traceable.
Do you supply caps and protection boxes
Yes. Top and bottom caps and outer protection boxes are available as optional parts for inclinometer casings.
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