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pipe ring stiffness test machine

pipe ring stiffness test machine

Model: RST-120

RST-1 series ring stiffness tester is used to determine the ring stiffness of circular cross-section thermoplastic pipes, according customer’s request, it can also execute compression, ring stiffness, ring softness and creep ratio test. This tester meet the requirement of all kinds of plastic pipes, structured-wall pipes, PVC, HDPE, LDPE, PE corrugated pipes, helically wound pipes etc., 

Conform with Standard ISO 9969, ISO 9967


Feature of RST-1 series:

Suitable for small size pipe test (less 630mm dia.);  computer control, economical type.

General introduction

RST-1 series ring stiffness tester is used to determine the ring stiffness of circular cross-section thermoplastic pipes, according customer’s request, it can also execute compression, ring stiffness, ring softness and creep ratio test. This tester meet the requirement of all kinds of plastic pipes, structured-wall pipes, PVC, HDPE, LDPE, PE corrugated pipes, helically wound pipes etc., 

Conform with Standard ISO 9969, ISO 9967


Feature of RST-1 series:

Suitable for small size pipe test (less 630mm dia.);  computer control, economical type.

Main Features

  • Key feature
  • Security function
  • Control system, Software
  • Standard

1, Two column design ensures high rigidity;

2, Advanced closed loop AC servo control system increases the accuracy and control of the test sequence. 

3, Our unique inner diameter measuring system makes mounting of even the largest pipe easy.

4, The software is designed in-house and is very easy to use and runs on most modern computers.


1), Sensor of position limitation switch; 

2), Emergency stop switch; 

3), Hardware driving system overload protection, over voltage, current protection;

4), Software over load protection. 

1), Based on full digital STC8800 measuring and control card; Data collection system use 4 channel of high accuracy 24 digit A/D conventer;

2), Real time load, deformation, corsshead displacement, test precess four kind close loop control;

3), Resolution can upto 1/500000, full range without step;

4), Level authorization management function: to improve sftware and data security, can set different password to realize several class authorization management. Different user with different right to operate the machine, avoiding unexpected mistake because human error.

5), PC control system, with advantage of high integration, reliable performance, easy adjusment etc. can real time collect test data, on-time display test curve,  test data file can be saved as ACCESS and SQL server, convenient for customer's data resource storage.

6), Automatically generate the testing report; the testing report can be displayed and printed, also it can be export in Excel/Access Format. Also, the user can edit the report format as requirement in report template;

7), Result recall function: after the test and saved, customer can open the test data and re-analysis at any time.

8), Results compare: observe several curve at same time, can fold curve or portion enlarge to analyze and compare sample characters.

9),Load~Time, Load~displacement, Displacement~time etc. curve smoothly switch, display test data, save, analysis and print.

ISO 9969  Thermoplastics pipes -- Determination of ring stiffness

ISO 9967  Thermoplastics pipes -- Determination of creep ratio

ASTM D2412 Standard Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel-Plate Loading

EN 1446 Plastics piping and ducting systems - Thermoplastics pipes - Determination of ring flexibility

DIN 16961 Thermoplastics pipes and fittings with profiled wall and smooth pipe inside

AS/NZS 1462.22 Methods of test for plastics pipes and fittings Method 22: Thermoplastics pipes – Determination of ring stiffness

Main technical specification

Load capacity20KN (0.4%--100%)
Multiple load cell in one machine functionYES
Load AccuracyClass 0.5 according ISO7500-1
Load cell overload capacity150% of rate capacity
Load measuring resolution1/500000 FS, stepless
Position / displacement resolution0.001mm
Crosshead travel1200mm
Tensile test space900mm
Compression test space900mm
Effective test width450mm
Compression platen diameterΦ100mm
Testing speed range0.001   mm/min~500 mm/min, stepless, adjustable arbitrarily  
Weight300kg
Standard Power220/110V,   50/60HZ, 1 phase
Dimensions785*560*1730mm
Analysis softwareFastTest English version
Working systemMS Win10 / Win11


Main Accessories

ItemQuantity
Frame1 set
   (include load cell, servo motor etc.,)
Compression platen (400*400mm)1 set
Pipe inner diameter measuring device1 set
Computer (English Win10)1 set
Professional ring stiffness test software (English)1 set
Documents (Manual, packing list, certificate)



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Beijing United Test Co., Ltd.