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Compression Testers

According to ISO 9969, ISO 9967 , ASTM D2412 , ASTM D695 , EN 61386, ISO 604
Ranging from 10 kN up to 300 kN, and with vertical test spaces from 900 mm up to 3000 mm

Compression 30Kn – 100Kn

Compression 150Kn – 300Kn

Compression plates 100 kn

Compression Standards Series Overview

The Bayerteq Compression Tester is purpose-built for evaluating the compressive performance of thermoplastic and thermosetting materials. Unlike Universal Testing Machines, which can perform tensile, shear, and peel testing, this system is specialized exclusively in compression-based testing methods.

It provides precise measurements of critical properties such as compressive strength, compressive modulus, stress-strain behavior under load, long-term creep deformation, ring stiffness, and ring flexibility.

This dedicated system is ideal for testing plastic pipes, fittings, profiles, foams, and other components subjected to compressive forces. With its application-focused design, it serves as a reliable solution for quality inspection, product development, and long-term performance evaluation in the plastics industry.

Engineered with advanced technology, the GALAXY CT Series combines robust construction with the powerful BT measurement and control software. This ensures high precision, intelligent operation, and long-term durability, delivering an efficient and user-friendly testing experience for compression-specific applications.

We offer our Compression Testers in several sizes and force classes, ranging from 10 kN up to 300 kN, and with vertical test spaces from 900 mm up to 3000 mm, ensuring the right configuration for every application.

Applications

Compression testers are the industry standard for evaluating the structural behavior and long-term durability of plastic pipes, fittings, and materials. With high accuracy and robust construction, they are ideally suited for:

Ring Stiffness Tests (ISO 9969, ASTM D2412)

Ring Flexibility Tests (ISO 13968)

Compression Strength Tests for plastic and composite components (ASTM D695, ASTM D2412)

Creep Ratio Tests (ISO 9967)

Long-Term Compression and Deformation Studies

Mechanical compression performance of conduit systems (EN 61386).

Key Features

Precision load application for reliable results

Configurable test frames to accommodate various pipe diameters and specimen types

Automated data acquisition for load, deflection, and time-dependent deformation

Compliance with international standards (ISO, ASTM, EN)

Durable construction to handle long-term and high-load tests

System Design & Safety

The BT Compression Series has been engineered for precision and reliability in dedicated compression testing:

Rigid frame construction ensures stability during long-term creep tests.

Maintenance-free AC motor drive system delivers smooth, accurate load application.

Safety systems include overload protection, emergency stop, and limit position safeguards.

All machines comply with IEC 60947 Machinery Directive and carry CE certification.

BT Software – Intelligent Control & Data Management

The in-house developed BT Software is a central component of the Compression Standards Series. It is tailored specifically for compression, ring stiffness, and creep testing workflows, providing compliance with ISO, ASTM, and EN methods.

Closed-Loop Control & Test Accuracy

The software supports closed-loop control in all relevant modes:

Constant stress rate for strength-based compression testing.

Constant strain rate for deflection-based standards such as ring stiffness.

Constant load / creep mode for long-term creep ratio tests.

Zeroing functions remove initial specimen stresses, while high-speed controllers ensure precise capture of load-deflection curves, creep curves, and modulus data.

Operators can select a test directly from the menu, and the system automatically applies the correct parameters (loading rates, dwell times, data logging intervals). Custom test plans can also be created for non-standard or R&D applications, then saved for repeat use.

User Interface & Operation

Wizard-style operation guides the operator step-by-step.

Real-time graphical display of load vs. deflection and creep curves.

Multi-channel monitoring of load, displacement, strain, and time.

Configurable dashboards for single or multiple test stations.

Data Management & Reporting

Automatic calculations: ring stiffness (SN values), creep ratio, modulus of elasticity, compressive strength.

Multi-curve plotting for comparison of specimens.

Test reports customizable for internal QC or certification bodies.

Export formats: Excel, CSV, HTML, PDF.

Long-term storage for trend analysis and traceability.

The Bayerteq BT Compression Standards Series provides a dedicated solution for compression, pipe stiffness, ring stiffness, and creep ratio testing in full compliance with ISO, ASTM, and EN standards. Combined with the BT Software platform, it offers laboratories and manufacturers a robust, accurate, and easy-to-use testing environment with advanced automation, safety, and reporting functions.

Spherically seated compression platens are designed to test specimens whose surfaces are not perfectly parallel. When a small pre-load is applied, the spherical seat allows the platen to self-align—up to 4°—with the specimen surface, relative to the machine’s loading axis.

Depending on the model, the spherical seat may be built directly into the compression platen or added separately to convert a standard platen into a spherically seated one. The platens feature a hardened surface to prevent deformation during testing and a polished finish to reduce friction between platen and specimen.
For platens with a diameter of 100 mm or greater, a locking mechanism is included to secure the spherical seat, ensuring it remains parallel with the lower platen. In addition, an LVDT deflection sensor can be mounted to enable precise strain measurement.

compression plates under angle

Spherical compression plates under angle

Measurement of outside-diameter deflection

The tester records OD deflection using the servo motor’s built-in high precision encoder that drives the upper compression plate. As the plate moves, displacement is captured with high precision and transferred automatically to the software. The lower compression plate is fixed to the machine base.

Measurement of outside-diameter deflection

Measurement of deflection of inner diameter

Measurement of outside-diameter deflection

Our universal compression tester is designed to evaluate the performance of plastic pipes and fittings under controlled loads and environmental conditions. By combining precise load application with a fully integrated oven/climate chamber, we can reproduce the stresses that pipes experience in real service — from soil pressure to long-term creep at elevated temperatures.

Test Methods Available

1. Ring Stiffness (ISO 9969, ASTM D2412)

In the ring compression test, a pipe section (ring) is placed between two flat plates and compressed at a constant rate. This determines the stiffness class (SN) of the pipe and its ability to resist deformation under external load. While commonly carried out at room temperature, the test can also be performed inside the chamber at elevated service temperatures for advanced applications.

2. Creep and Long-Term Deflection (ISO 9967)

The ring creep test applies a constant load to a pipe ring over extended periods — from several hours to weeks. Conducting the test inside a temperature-controlled oven (typically 40 °C or 60 °C) simulates the combined effect of soil loading and long-term thermal exposure. This provides valuable data on the pipe’s long-term stability and deformation characteristics.

3. Flattening Test (ISO 2505, EN 744)

In the flattening test, pipe samples are compressed to a specified percentage of their original diameter after being conditioned in the oven, often at 110 °C for PVC pipes. This method checks for cracks, delamination, or other structural weaknesses that may appear under combined mechanical and thermal stress.

4. Combined Load and Heat Tests

For certain applications, pipes are subjected to continuous load or pressure while being maintained at elevated temperature. With our compression tester and integrated climate chamber, such combined stress tests can be carried out to assess safety margins under worst-case service conditions.