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3. Ring tensile test
3.1 The sections of pipe measuring about 15 mm in length shall have plane and smoothed ends and shall be at right angle to the pipe axis. To perform this test,
the pipe sections are stretched in a tensile testing machine until fracture occurs using two pins with a diameter equal to at least three times the wall thickness of the pipe, see Figure 2.10. In the case of welded pipes, the specimen shall be placed in the tensile testing device in such a way that the welded seam lies at 90¡ã to the direction of the tensile load.
The rate of the pins may not exceed 5 mm/s.
4. Drift expanding test
4.1 To perform this test, a tapered drift is forced into the specimen until the outside diameter has increased to the prescribed value C for the product in question, see Figure 2.11. The length of the specimen and the taper angle ¦Â of the drift shall be as shown in the following Table. The intrusion rate of the taper may not exceed 50 mm/s.

5. Flanging test
5.1 To perform this test, a sample of pipe with a length L = 1,5 D is worked into a flange in the device shown in Figure 2.12 until the outer diameter C of the flange attains the value prescribed for the product.
The radius r shall match that prescribed for the product.

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