AS 1330:2019 pdf download.Metallic materials – Drop weight tear test for steels.
5.5 Temperature control
A temperature-controlled environment shall be provided in which the test piece is soaked for temperature conditioning before testing. Provision shall be made for circulation of the medium to ensure a uniform soaking temperature, see Clause 7.1.
NOTE A procedure should be developed for test temperatures above or below room temperature, to ensure temperature change between the exit from the temperature conditioning medium and the execution of the testis within the specified limits, see Clause 7.2.
6 Test piece
6.1 Location of the test piece
A test specimen shall be removed from a pipe so that the length of the specimen is in the circumferential
direction of the pipe and in the approximate position shown in Eigur2.
NOTE For pipes with an outside diameter larger than 500 mm, the alternative position b may be used. For plate and strip material, a test piece shall be selected to approximate its final position in the pipe.
6.2 Test piece geometry
The central 50 mm portion, L (see Figure 1). should be left with the original pipe curvature.
The material each side of the undeformed 50mm area is bent such that the mid thickness at the centre of the test piece shall be in the same plane as the mid thickness at the anvil supports. This is known as a gull-wing test piece.
NOTE 1 A detailed description for forming a gull-wing test piece is given in Appendi.
Alternatively, unless otherwise specified in the product Standard, the test piece may be flattened completely for testing purposes.
In the case of a dispute, the results of tests on test pieces with the central area undeformed shall apply.
NOTE 2 For expanded pipe with an outside diameter to thickness ratio of less than 40, and in some nonexpanded pipe. flattening has been observed to decrease the percentage shear of the fracture. Should a flattened test piece from a pipe perform satisfactorily, it can be accepted that a non-flattened test piece would also be satisfactory. The reverse does not necessarily apply.AS 1330 pdf download.