ISO 13996 pdf download

ISO 13996 pdf download.Protective clothing — Mechanical properties — Determination of resistance to puncture 1 Scope This International Standard specifies a test method for measuring the puncture resistance of protective clothing or materials used for these products. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. lSO 2231 , Rubber- or plastics-coated fabrics — Standard atmospheres for conditioning and testing. ISO 7500-1 , Metallic materials — Verification of static uniaxial testing machines — Part 1 : Tensile/compression testing machines. 3 Term and definition For the purposes of this International Standard, the following term and definition apply. 3.1 puncture resistance maximum force required to push a spike with a specified speed through the test specimens NOTE It is expressed in newtons. 4 Test specimens Take four representative test specimens from the sample, each of 50 mm minimum diameter, so that the specimens fit between the bolt holes of the clamps. 5 Test method 5.1 Apparatus 5.1.1 Tensile testing machine, type CRE as defined in ISO 7500-1 . It shall be capable of  a vertical travel of at least 1 00 mm,  a constant rate of compression of (1 00 ± 1 0) mm/min, and include a recording apparatus for the force and deformation. 5.1.2 Test spike, made of steel, with a minimum hardness of 60 HRC. It shall have the dimensions and the characteristics as shown in Figure 1 . The test spike shall be checked by an optical enlargement after every 500 tests or at least once a year. When testing materials, which wear out the test spike, the optical checks should be done more frequently. If this check shows that the test spike dimensions do not comply with the dimensions of Figure 1 , the test spike shall be discarded. Control of the dimensions of the test spike is important. It is recommended that every test laboratory maintain an internal reference material to carry out regular checks...