The standard in the field of ultra-fine screen industry developed the first meeting was held in Xinxiang last week. Member, ultra-fine screen work group of national particle characterization and sorting and screen Standardization Technical Committee of national and provincial departments at all levels, the standard unit of scientific research and production of more than 20 experts attended the meeting.

　据悉，目前我国超细筛网设备行业尚无统一的行业标准和国家标准，生产企业依据各自的企业标准组织生产。为改变这一状况，提升行业竞争力和方便用户进行设备选型，目数，就是孔数，就是每平方英寸上的孔数目。目数越大，孔径越小。一般来说，目数×孔径（微米数）＝15000。比如，400目的筛网的孔径为38微米左右；500目的筛网的孔径是30微米左右。由于存在开孔率的问题，也就是因为编织网时用的丝的粗细的不同，不同的国家的标准也不一样，目前存在美国标准、英国标准和日本标准三种，其中英国和美国的相近。

It is reported, at present there is no unified our country fine screen equipment industry standards and national standards, production enterprises according to their enterprise standards organization of production. To change this situation, improve the competitiveness of industries and user-friendly equipment selection, mesh size, is the number of holes, is the number of holes per square inch. The larger mesh, small size. In general, mesh × pore size (micron number) = 15000. For example, a pore size of 400 mesh to 38 microns; aperture 500 mesh is about 30 microns. Due to the presence of open hole ratio problem, because of woven mesh with wire thickness is different, different countries are not the same as the standard, American Standard, the British standard at present and Japanese standard three, which Britain and the United States are similar.