ASTM D2444 - 99(2010)

Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)

ASTM D2444 Impact Resistance of Plastic Pipe and Fittings. Two specimen holders are described. UnitedTest supply quality falling impact testing machine. To prevent a secondary impact of the falling weight onto the pipe or fitting we employ our anti rebound device.

This test method covers the determination of the impact resistance of thermoplastic pipe and fittings under specified conditions of impact by means of a tup (falling weight). Three interchangeable striking noses are used on the tup, differing in geometrical configuration. Two specimen holders are described. The mass of the tup shall be 6, 12, 20 or 30 lbs (2.7, 5.4, 9.1, or 13.6 kg) and shall fall from a maximum height of at least 10 ft (3.0 m) and a minimum of 2 ft (0.6 m). There are three interchangeable inserts for the tup, Type A is a cone with a rounded point, Type B is a cylinder with a relatively flat surface, and Type C has a 0.5" diameter “pin” with a rounded end. Two specimen supports (either a V-block or a Flat Plate) are defined in the standard.  The combination of test variables which offers reasonably repeatable results with the test being easy to run with little or no hazard to personnel is the one that should be used.

The impact resistance of thermoplastic pipe and fittings relates to suitability for service and to quality of processing. Impact resistance may also provide a relative measure of a material's resistance to breakage during handling and installation and, for non-buried applications, to in-service breakage. See Appendix X4 for guidelines for selecting testing combinations.
 

ASTM D2444, tup nose detail

Results obtained by use of this test method can be used in three ways:

As the basis for establishing impact test requirements in product standards,

To measure the effect of changes in materials or processing, and

To measure the effect of the environment.

ASTM D2444 - 17

Standard Practice for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)