Sökning - 10 resultat för 'TK 156'

This document specifies a method for determining the longitudinal tensile properties of pipe or pipe/pipe or pipe/fitting assemblies using hydraulic pressure. The method accommodates water-in-water or liquid-in liquid tests or their combinations. The document is applicable to pipes and their assemblies with fused or bonded joints with the same or different MRS or design SDR. The method provides load-displacement curves, from which the following properties are determined., — the longitudinal strengths ( — the percent elongation ( σLY , LB ) — the energy to failure (UT)

This document specifies methods for testing the resistance to sustained longitudinal tensile loading (longitudinal stress-rupture) of uniaxial plastic pipe/pipe or pipe/fitting or fitting/fitting assemblies using hydrostatic pressure at a given temperature. This document is applicable to pipe assemblies with electrofusion or butt fusion joints. The methods accommodate water-in-water, water-in-air, and liquid-in liquid tests. Method A uses no external hoop expansion restraint (specifically designed test piece). Method B uses external hoop expansion restraint (metal end caps or circumferential (ring) clamps). Note 1 The longitudinal (axial) tensile loading by hydrostatic internal pressure is achieved by using means to create axial stress as the maximum principal stress over the hoop stress in the assemblies. The external hoop expansion restraint or specific test piece design is used for this purpose[1,2].

This document specifies the method for the characterisation of the compaction response of fibrous reinforcements used in liquid composite moulding. Specimens are compressed at a controlled speed to a predetermined thickness and the relative compressive load is measured. In this method, specimens are tested in both the saturated (“wet”) and unsaturated (“dry”) state. The following steps explain how to prepare the test setup and characterise the compaction response. This method specifies the speed of testing. It should be noted that testing at different speeds can yield different results which may not be comparable.

This document establishes the general principles for the design and manufacture of mono or multi-layer rotational moulded polyethylene water storage vertical and horizontal cylindrical tanks. This document is applicable to water storage tanks with a nominal service temperature from 1 °C to 60 °C and does not cover any other nominal service temperature. This document does not apply to the following: — Underground water tanks; — Mobile water tanks.

The standardisation of the test methods used to measure the out-of-plane permeability of fibrous reinforcements used in the manufacture of composite materials by liquid composite moulding. The test method details the equipment and procedure for measurement of the out-of-plane permeability, K3, at a known volume fraction.

This document specifies the general terms and definitions relevant to the utilization of thermoplastics materials in a circular economy in pipes, fittings and ancillaries for both pressure and non-pressure piping systems. This document is intended to be used by specification writers in conjunction with CEN/TS 14541-2 [7] when preparing normative documents under the scope of CEN/TC 155.

This document specifies two methods for the determination of the density of glass fibre tested as a yarn: —Method A: Gas pycnometer method; —Method B: Liquid pycnometer method.

This part of ISO 1268 specifies the general principles and procedures for the compression moulding of test plates from two types of fibre-reinforced thermosetting moulding compound: sheet moulding compound (SMC) and bulk moulding compound (BMC). The aim of this part of ISO 1268 is to ensure the preparation of flat test plates from which test specimens can be cut (for the relevant test methods, see Annex A). The plates are produced in such a way that specimens cut from them give representative results when used in these test methods.

This document specifies a method for determining the flexural properties of rigid and semi-rigid plastics under defined conditions. A preferred test specimen is defined, but parameters are included for alternative specimen sizes for use where appropriate. A range of test speeds is included. The method is used to investigate the flexural behaviour of the test specimens and to determine the flexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under the conditions defined. It applies to a freely supported beam, loaded at midspan (three-point loading test). The method is suitable for use with the following range of materials: — thermoplastic moulding, extrusion and casting materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; — thermosetting moulding materials, including filled and reinforced compounds; thermosetting sheets. In agreement with ISO 10350-1[5] and ISO 10350-2[6], this document applies to fibre-reinforced compounds with fibre lengths ≤7,5 mm prior to processing. For long-fibre-reinforced materials (laminates) with fibre lengths >7,5 mm, see ISO 14125[7]. The method is not normally suitable for use with rigid cellular materials or sandwich structures containing cellular material. In such cases, ISO 1209-1[3] and/or ISO 1209-2[4] can be used. NOTE 1 For certain types of textile-fibre-reinforced plastic, a four-point bending test is used. This is described in ISO 14125. The method is performed using specimens which can be either moulded to the specified dimensions, machined from the central section of a standard multipurpose test specimen (see ISO 20753) or machined from finished or semi-finished products, such as mouldings, laminates, or extruded or cast sheet. The method specifies the preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions, or on specimens which are prepared under different conditions, can produce results which are not comparable. Other factors, such as the test speed and the conditioning of the specimens, can also influence the results. NOTE 2 Especially for injection moulded semi-crystalline polymers, the thickness of the oriented skin layer, which is dependent on the moulding conditions, also affects the flexural properties. The method is not suitable for the determination of design parameters but can be used in materials testing and as a quality control test.

This test method covers the determination of the low-rate fracture toughness (JIc) of plastics exhibiting a ductile behaviour and characterized by a macroscopically stable crack growth during a fracture test. The application of standard LEFM tests to these materials typically fails due to the excessive non-linearity in the response. This test method, developed for the SEN(B) testing configuration, describes a single-specimen approach that does not require the measurement of Δa. Not intended to provide a method to construct the material JR curve, this test method allows checking a priori the applicability of the multi-specimen approach based on the Δa measurement for the construction of the material JR curve to a ductile polymer with given specimen geometry and dimensions. This is done by referring to a specially developed crack propagation parameter, which is labelled mS.