Polyethylene (PE) materials for piping systems. Determination of Strain Hardening Modulus in relation to slow crack growth. Test method
Polyethylene (PE) materials for piping systems. Determination of Strain Hardening Modulus in relation to slow crack growth. Test method
1 Scope This International Standard specifies a method for the determination of the strain hardening modulus which is used as a measure for the resistance to slow crack growth of polyethylene. The strain hardening modulus is obtained from stress-strain curves on compression moulded samples. This International Standard describes how such measurement is performed and how the strain hardening modulus shall be determined from such a curve. Details of the required equipment, precision, and sample preparation for the generation of meaningful data are given. This International Standard provides a method that is valid for all types of polyethylene, independent from the manufacturing technology, comonomer, catalyst type, that are used for pipes and fittings applications. NOTE This method could be developed for materials for other applications.
Другие стандарты BS