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Pipe Apparent Hoop Tensile Testing Machine ASTM D2290

Pipe Apparent Hoop Tensile Testing Machine ASTM D2290

Model: UT1036, 3000mm GRP Pipe Hoop Tensile Test

UnitedTes UT1036 Pipe Apparent Hoop Tensile Testing Machine is a professional electro-hydraulic servo test instrument built for ASTM D2290 apparent hoop tensile strength testing of plastic and reinforced plastic pipes. This complete pipe ring tensile tester integrates four core modules: main test frame, hydraulic power unit, computerized measurement & control system, and electrical safety control cabinet. It supports triple closed-loop servo control for load, deformation and displacement, enabling seamless program-controlled mode switching to match diverse pipe material test standards and lab testing workflows.


Fully compliant with ASTM D2290 industry standard, this pipe hoop tensile tester equips a self-aligning split disk fixture to evenly distribute tensile stress around pipe ring specimens. Pre-programmed dedicated test procedures cover pipe diameters ranging from 300mm to 3000mm. The machine performs continuous axial tension until pipe ring fracture, then auto-calculates accurate apparent hoop tensile strength based on breaking load and original pipe dimensional data. Widely adopted for new pipe material R&D, incoming material inspection and finished product quality control across global plastic pipe manufacturing industries.

General introduction

UnitedTes UT1036 Pipe Apparent Hoop Tensile Testing Machine is a professional electro-hydraulic servo test instrument built for ASTM D2290 apparent hoop tensile strength testing of plastic and reinforced plastic pipes. This complete pipe ring tensile tester integrates four core modules: main test frame, hydraulic power unit, computerized measurement & control system, and electrical safety control cabinet. It supports triple closed-loop servo control for load, deformation and displacement, enabling seamless program-controlled mode switching to match diverse pipe material test standards and lab testing workflows.


Fully compliant with ASTM D2290 industry standard, this pipe hoop tensile tester equips a self-aligning split disk fixture to evenly distribute tensile stress around pipe ring specimens. Pre-programmed dedicated test procedures cover pipe diameters ranging from 300mm to 3000mm. The machine performs continuous axial tension until pipe ring fracture, then auto-calculates accurate apparent hoop tensile strength based on breaking load and original pipe dimensional data. Widely adopted for new pipe material R&D, incoming material inspection and finished product quality control across global plastic pipe manufacturing industries.


Key Structural & Performance Advantages

1), Rigid Stable Main Test Frame

Ergonomically optimized steel rigid frame structure with compact aesthetic layout, ultra-high frame rigidity and minimal ground vibration during long-duration tensile tests. Adopts hydraulic wedge clamping jaws with single upper cylinder layout and bidirectional servo cylinder drive, realizing stable closed-loop tension & compression control in the lower test zone. Jaw design supports parallel specimen insertion, drastically reducing frequent test space readjustment. Test stroke is directly adjusted via piston lifting for fast, efficient specimen setup. Multi-layer hardware + software dual safety protection ensures full operational safety and long-term reliable operation.

2), Precision Electro-Hydraulic Servo Closed-Loop Control System

The intelligent measurement & control unit consists of professional control card, high-response servo valves, high-accuracy load sensors, displacement transducers and contact extensometers, paired with industrial control computer to form a full closed-loop servo control system. Operators can run fully manual or programmable automatic test cycles. The system auto-acquires real-time test force, displacement and deformation data, supports automated or manual post-test result analysis, editable custom test reports, and built-in network data transmission port for remote lab data sharing.


What's the split disk test for plastic or reinforced plastic pipes hoop tensile test? 

The apparent hoop tensile testing of plastic or reinforced plastic pipes using the split disc method is a standard testing procedure for determining the apparent hoop tensile strength of plastic pipes under axial tensile load. This method loads the pipe using a split disc grip to simulate the stress state under actual use conditions, and is suitable for reinforced thermosetting resin pipes and thermoplastic pipes. 


Testing Principle
The mechanical performance indicators such as elastic limit, elongation, and elastic modulus of the material are determined through axial tensile load. The test results can be used in research and development, engineering design, and quality control fields.

Pipe Apparent Hoop Tensile Testing Machine ASTM D2290

Key Features

  • Loading frame
  • Split fixtures
  • Dual flange load sensor
  • Hydraulic power unit
  • Control unit

1, Self-Balancing Door-Type Structural Test Reaction Frame – Core Equipment Overview

Our self-balancing door-type reaction frame is specialized integrated test support equipment for civil structural component testing, engineered with self-balancing mechanical principles to handle vertical and bidirectional horizontal loading tests for columns, beam joints and building specimens.

Fitted with heavy-duty long-stroke double-acting hydraulic cylinders, this reaction frame delivers superior sealing performance, consistent test precision and stable output force. Its extended cylinder stroke accommodates test specimens of varying lengths and satisfies tensile testing of materials with vastly different elongation rates without equipment replacement.

The main test frame features ultra-rigid low-center-of-gravity structural design. The hydraulic power assembly absorbs most impact energy upon specimen fracture, drastically cutting shock, operating noise and floor vibration during destructive structural tests. The overhead hydraulic cylinder layout optimizes usable tensile test space for simple, ergonomic specimen mounting and routine operation.

This door-type reaction frame is equipped with high-precision bidirectional tension-compression load sensors. The structurally optimized sensors boast outstanding stability, ultra-high measurement accuracy and excellent linear output. The rigid frame body offers powerful anti-side-load capacity to offset lateral force interference from eccentric and complex multi-point loading tests.


2, Key Functional Features & Technical Parameters

All-in-one multifunctional reaction frame dedicated to laboratory structural engineering testing

Full self-balancing structural design eliminates unbalanced reaction force interference during complex loading cycles

Main beam vertical bearing capacity adjustable from 250kN to 1000kN to match diverse vertical load test requirements

Supports bidirectional horizontal reaction loads ranging 250kN–1000kN; reliably counteracts horizontal forces from eccentric column testing and complex beam-column joint loading tests

Frame body constructed from high-strength Q345-B structural steel for long-term high-load service life

The two slip fixtures are fixed on the finely processed guide surface, and the running direction is constrained by the guide rails. When stressed in different directions, there will be no deflection, ensuring that the sample during the tensile process experiences a uniform external tensile force. 

The load has a continuous characteristic without staging, showcasing superior performance.
The bottom-mounted load sensor ensures that the additional resistance during tensile testing is zero.

The hydraulic system is equipped with high-quality brand hydraulic components and accessories, achieving a system that is leak-free and pollution-free.
A servo valve is adopted, which responds swiftly and maintains high control precision, while also enhancing resistance to contamination and ease of maintenance.

Main technical specification

ModelUT1036H
Max. load100KN/200KN/300KN
Measuring force   range3~200KN
Accuracy of load±0.5% of indicated   value
Accuracy of deformation±0.5%, resolution:   0.005mm
Deformation measuring resolution0.001mm
Constant load, Range0.4%~100%FS
Hoop tensile fixture max. diameter2600mm pipe
Hoop tensile fixture groove suitable   for pipe range300mm ~ 2600mm pipe
Max. tensile space1800mm
Piston stroke500mm
Max. working pressure20Mpa
Max. piston speed150mm/min
Frame typeSelf-Balancing Door-Type Reaction Frame
Two column effective distance1300 (Width)*550 (depth) mm
Dim. of frame2400×1250×3300mm
Dim. of control box1120×600×920mm
Weight of frame3800kg
Weight of hydraulic power unit400kg
Weight of 2600mm split hoop fixture4600kg
Power380V, 50HZ, 3 phase


Main accessories (Standard delivery with machine)

High Stiffness Frame1   set
Controlled box (Oil cabinet)1   set
Pressure sensor (500KN)1   set
Hydraulic power system1   set
High-precision electro-hydraulic proportion servo valve1   set
Photoelectric encoder for displacement1   set
Pipe hoop tensile test fixture1   set
Tool kit (screwdriver, spanner etc.,)1   set
Professional testing software(FastTest, English version)1   set
      Metal tensile testing method (ASTM D2290);
      Compression testing method (ASTM E9);
      Customize testing method function available.
Computer (HP or LENOVO computer, 19-inch LCD monitor, English Win10 system)1   set
Printer (HP A4 color inkjet printer)1   set
Documents (Manual, packing list, certificate)



Standard

ASTM D2290 Apparent Hoop Tensile Strength Testing

ASTM D2290: Standard Test Method for Apparent Hoop Tensile Strength of Plastic or Reinforced Plastic Pipe


This test method covers the determination of the comparative apparent tensile strength of most plastic products utilizing a split disk or ring segment test fixture, when tested under defined conditions of pretreatment, temperature, humidity, and test machine speed. This test method is applicable to reinforced-thermosetting resin pipe regardless of fabrication method. This test method also is applicable to extruded and molded thermoplastic pipe.


What Is the standard ASTM D2290, test method?

ASTM D2290 is a standard test for measuring the apparent tensile strength of plastic pipe test specimens. ASTM D2290 features a fixture that includes a holder with various inserts that are sized to match the range of pipe inside diameters that need to be tested. The inserts transfer the load and allow the pipe to be pulled apart to produce “apparent tensile strength”. It is an apparent tensile strength, rather than a true tensile strength because of a bending moment imposed during the test at the split between two split disk test fixtures. This moment is induced by the change in contour of the ring between the two disk sections as they separate. Apparent tensile strength test results are available at yield, rupture, or both.


Testing Method
Pre-treatment: Treat the pipes according to standard requirements for temperature, humidity, and other conditions.
Loading Method: Apply axial tension using a split disc grip until the pipe ruptures.
Data Calculation: Calculate the apparent circumferential tensile strength based on the load at fracture and the dimensions of the pipe. It should be noted that this testing method requires attention to: different programs correspond to different pipe diameters (e.g., Programs A, B, and C are applicable to reinforced thermosetting pipes, thermoplastic pipes of any size, and thermoplastic pipes with a nominal diameter ≥ 4 inches, respectively), and the test results reflect the mechanical performance close to the testing conditions, not suitable for scenarios that differ significantly from actual use conditions. 

Scope of Application
This method is applicable to reinforced thermosetting resin pipes (such as glass fiber reinforced plastic pipes) and extruded thermoplastic pipes (such as polyethylene, polybutene, etc.), covering pipes with diameters ranging from 4 inches to 8 inches. 

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Beijing United Test Co., Ltd.