GB/T 21189-2007 (English Version) PDF

Standard No.: GB/T 21189-2007
Language: Chinese, Available in English version
Release Date: 2007
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 21189-2007

Scope: This standard specifies the test methods for pendulum impact testing machines used in Charpy, Izod and tensile impact tests of plastics as described in ISO 179-1, ISO 180 and ISO 8256, respectively. This standard only deals with pendulum testing machines. The impact energy W (see 2.13) absorbed during the impact on the specimen is equal to the difference between the potential energy E (see 2.12) of the pendulum and the remaining energy of the pendulum after impacting the specimen. The impact energy is corrected to account for frictional and air resistance losses (see Tables 2 and 4.6). The methods described in this standard are related to the inspection methods of the geometric and physical properties of each part of the testing machine. Some geometric properties are difficult to check on the assembled testing machine, so the manufacturer is responsible for checking these properties and providing a reference plane on the testing machine that can be checked according to this standard. These methods are applied when the testing machine is installed, repaired, moved, or periodically inspected. This standard applies to pendulum impact testing machines of various capacities and/or types having the geometrical and physical properties specified in Clause 4.

GB/T 21189-2007 history

2007 GB/T 21189-2007 Verification of pendulum impact-testing machines used for charpy,lzod and tensile impact-testing of plastics