Bayerteq Wall Thickness Measurement Instrument – WMI Series (WMI 630)
- High-precision dimensional inspection instrument for measuring the wall thickness and ovality of plastic pipes
- Full compliance with ISO 3126 and ASTM D2122 (Determination of dimensions of thermoplastic pipes)
- Accommodates pipe diameters up to Ø 630 mm with deep-throat rigid C-frame retainer
- Smooth handwheel-operated height adjustment along precision guide channels; low-friction longitudinal sliding rails
- Integrated roller carriers for effortless 360° pipe rotation and complete circumferential wall profile mapping
- Includes automated data recording software calculating emax, emin, emean, and eccentricity diagrams
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The wall thickness measurement instrument (WMI 630 Series) manufactured by Bayerteq is a high-precision dimensional inspection system engineered for determining the wall thickness, eccentricity, and circumferential uniformity of plastic pipes with uncompromised accuracy. Designed in strict compliance with international standards including ISO 3126 and ASTM D2122, this instrument eliminates operator subjectivity to deliver reproducible, audit-ready dimensional verification for pipe extrusion lines and quality assurance laboratories.
Precise pipe wall thickness directly governs hydrostatic pressure ratings, raw material resin consumption, and compliance with nominal pressure (PN) classes. The Bayerteq wall thickness measurement instrument mounts high-resolution measuring probes on a rigid deep-throat C-frame retainer, enabling non-destructive, micro-accurate measurement of both thin-walled conduits and heavy thick-walled pressure pipes.
Wall Thickness Measurement Instrument Architecture & Operation
The WMI series combines robust mechanical ergonomics with advanced digital profile analysis software:
- Precision Retainer Height Adjustment: The upper measurement arm is smoothly adjusted via an ergonomic manual handwheel coupled to a ground linear guide channel, allowing technicians to position the probe instantaneously across varying pipe diameters up to Ø 630 mm.
- Multi-Point Longitudinal Sliding Carriage: Pipe specimens are positioned on a low-friction longitudinal sliding track, allowing seamless wall thickness measurement at any designated coordinate along the pipe barrel without re-clamping.
- Effortless 360° Specimen Rotation: Heavy-duty specimen carriers feature integrated low-friction rollers that support the pipe steadily while enabling smooth manual rotation around its longitudinal axis for full 360-degree circumferential profiling.
- Bayerteq Analytical Software Suite: Real-time digital gauge connectivity transfers measured thickness values directly into the software. The program automatically constructs circumferential thickness distribution diagrams and computes minimum wall thickness (emin), maximum wall thickness (emax), mean thickness (emean), and wall thickness ratio.
Every Bayerteq wall thickness measurement instrument is built with heavy cast-steel reaction frames to prevent deflection under arm insertion, guaranteeing precision calibration stability in demanding industrial extrusion plant environments.
Bayerteq WMI Series – Technical Specifications
| Parameter | Specification Details |
|---|---|
| Applicable Standards | ISO 3126, ASTM D2122, DIN EN ISO 3126, EN 12201, EN 1555 |
| Model Designation | Model WMI 630 (Standard Series; custom frames up to DN 1200 mm available) |
| Pipe Diameter Capacity | Up to Ø 630 mm outer diameter (Accommodates DN 20 mm to DN 630 mm) |
| Measurement Range | 0 – 50 mm / 0 – 100 mm wall thickness |
| Indicator Resolution | 0.01 mm / 0.001 mm (Digital indicator gauge with data interface) |
| Measurement Probe Geometry | Hardened spherical contact tips (conforming to ISO 3126 radius requirements) |
| Height Adjustment Mechanism | Manual handwheel driving upper retainer arm along ground precision linear guide channels |
| Longitudinal Adjustment | Sliding bed rail mechanism for measurement at arbitrary longitudinal points along sample |
| Specimen Support & Rotation | V-shaped carrier blocks fitted with low-friction support rollers for 360° axial rotation |
| Data Acquisition & Software | Bayerteq WMI Software: automated curve plotting, emax, emin, emean calculation, export to Excel/PDF |
| Frame Construction | Heavy-duty cast steel and reinforced tubular frame with anti-deflection geometry |
| Operating Environment | Laboratory and production floor environments (10 °C to 40 °C) |
Key Operational & Engineering Advantages
User-Independent Measurement Accuracy
Rigid mechanical guiding channels and standardized contact probe spring loads eliminate variations caused by operator hand pressure or tilt.
Effortless Handwheel Height Adjustment
Ergonomic manual handwheel allows rapid vertical repositioning of the measurement retainer, adapting to different pipe outside diameters in seconds.
Smooth 360° Specimen Rotation
Integrated roller bearings on the support carriers enable smooth axial rotation, allowing technicians to map full circumferential wall profiles easily.
Longitudinal Sliding Track
Low-friction sliding base rails allow the pipe sample to be repositioned along its length to check wall thickness at ends and middle sections.
Automated Profile Software
Direct digital communication captures measured points, renders a polar wall thickness diagram, and calculates eccentricity ratios automatically.
Zero-Deflection C-Frame Structure
Massive steel C-arm design prevents frame flexure when probing deep into large-diameter pipe sections up to Ø 630 mm.
System Modules & Optional Tooling
1. Measurement Gauge Options
Standard dial indicator gauges or high-precision digital electronic indicators with USB/RS232 data transmission interfaces.
2. Specialized Anvil Tips
Interchangeable spherical, cylindrical, and flat contact tips conforming to international pipe wall radius specifications.
3. Extended Support Rails
Modular extension tracks for long pipe specimens up to 2,000 mm or 3,000 mm in length.
4. Bayerteq WMI Software Package
Windows-compatible software suite for automated data acquisition, polar diagram rendering, and ISO 17025 test report generation.
Industry Standards & Practical Applications
The Bayerteq Wall Thickness Measurement Instrument is essential equipment for plastic pipe manufacturers, testing laboratories, and certification agencies:
- Extrusion Line Quality Control (ISO 3126): Rapid off-line verification of pipe wall thickness, eccentricity, and ovality immediately following extrusion cooling sizing.
- Pressure Pipe Certification (ASTM D2122 / EN 12201 / EN 1555): Verifying minimum wall thickness (emin) requirements for potable water and fuel gas distribution pipes.
- Eccentricity & Resin Savings Optimization: Detecting die head misalignments early to eliminate wall thickness unevenness and optimize raw material usage.
- Multi-Layer Pipe Layer Verification: Dimensional verification of solid-wall and multi-layer composite piping systems.
- Pre-Hydrostatic Test Inspection: Mandatory wall thickness verification prior to creep and burst pressure testing per ISO 1167.