ASTM D2444 – Standard Practice for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)
Description:
Significance and Use
4.1 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 X5 for guidelines for selecting testing combinations.
4.2 Results obtained by use of this practice can be used in three ways:
4.2.1 As the basis for establishing impact test requirements in product standards,
4.2.2 To measure the effect of changes in materials or processing, and
4.2.3 To measure the effect of the environment.
Scope
1.1 This practice 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.
Note 1: Appendix X1 shows the procedure to determine impact strength.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
ASTM D2440