BS EN 1120-1996 塑料管道系统.玻璃增强的热固塑料(GRP)管和配件.偏离规定条件下部件内部耐化学侵蚀性能的测定

标准号：BS EN 1120-1996
中文标准名称：塑料管道系统.玻璃增强的热固塑料(GRP)管和配件.偏离规定条件下部件内部耐化学侵蚀性能的测定
英文标准名称：Plastics piping systems - Glass-reinforced thermosetting plastics (GRP) pipes and fittings - Determination of the resistance to chemical attack from the inside of a section in a deflected condition
标准类型：G33;P94
发布日期：1996/9/15 12:00:00
实施日期：1996/9/15 12:00:00
中国标准分类号：G33;P94
国际标准分类号：23.040.20;23.040.45
适用范围：This standard specifies a method for determining the chemical resistance properties of glass-reinforced thermosetting plastics (GRP) pipes and fittings in a deflected condition for nominal sizes DN 100 and larger. In conjunction with EN 705 this standard provides a method for evaluating the effect of a chemical environment on the interior of a pipe or fitting after a specified period of time. . It has been found that the effect of chemical environments can be accelerated using strain induced by deflection, hence it is frequently referred to as strain corrosion. NOTE 2. To study the applicability of the method to testing the pipe or fitting with regard to structural failure (where structural failure becomes apparent by a sudden reduction in the load applied of at least 20 % of the initial load) then where 'weep failure' is referred to in this standard substitute 'structural failure'. A structural failure can be caused by conditions such as: - interlaminar separation; - cracks in or through the structural layer of the wall; - tensile failure of the glass reinforcement; - if applicable, separation of a thermoplastics liner from the structural wall. For such studies, data from 'structural failure' results will be analysed separately from 'weep failure' results.