{"id":8870,"date":"2020-11-05T16:53:48","date_gmt":"2020-11-05T15:53:48","guid":{"rendered":"https:\/\/consilab.de\/?page_id=8870"},"modified":"2022-07-08T10:45:04","modified_gmt":"2022-07-08T08:45:04","slug":"determination-of-the-lower-explosion-point-lep","status":"publish","type":"page","link":"https:\/\/consilab.de\/en\/benefits\/parameters-for-substances\/determination-of-the-lower-explosion-point-lep\/","title":{"rendered":"Determination of the lower explosion point (LEP)"},"content":{"rendered":"

[vc_row rt_row_background_width=”fullwidth” rt_row_content_width=”default” rt_row_style=”default-style” rt_row_borders=”” rt_row_shadows=”” rt_row_paddings=”false” rt_bg_effect=”classic” rt_bg_image_repeat=”repeat” rt_bg_size=”cover” rt_bg_position=”right top” rt_bg_attachment=”scroll” rt_bg_video_format=”self-hosted”][vc_column width=”1\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”download” rt_bg_color=”” rt_bg_overlay_color=”” offset=”vc_hidden-sm vc_hidden-xs” css=”.vc_custom_1532421990135{padding-bottom: 0px !important;}” rt_padding_bottom=”0″][vc_widget_sidebar sidebar_id=”rt-theme-20-common-sidebar”][\/vc_column][vc_column width=”2\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”maincontent” rt_bg_color=”” rt_bg_overlay_color=”” css=”.vc_custom_1532421960235{margin-bottom: 1em !important;padding-bottom: 0px !important;}”][vc_column_text el_class=”redborderleft”]<\/p>\n

Determination of the lower explosion point (LEP)<\/h1>\n

The lower explosion point is the temperature of a flammable liquid at which the concentration of saturated vapor in air equals the lower explosion limit.<\/p>\n

The lower explosion point is determined in accordance with DIN EN 15794. The test apparatus used is illustrated in Figure 1<\/strong>. For testing, approx. 120 \u2013 140 g of the product is placed into the glass cylinder (\u00d8 = 88 mm; H = 320 mm). A Huber Ministat 230 thermostat is used to bring the glass cylinder to the proper temperature through a double wall.<\/p>\n

\"\"<\/p>\n

The temperatures of the sample and the vapor phase above it are recorded. The sample is stored for at least 0.5 h to allow sufficient time for equilibrium to be established. After the temperature stabilization time, an ignition spark (energy > 1 J) is used to check whether the gas atmosphere above the sample can be ignited.<\/p>\n

The atmospheric pressure is recorded during the measurement.<\/p>\n

The highest temperature at which no ignition occurs is used as the \u201clower explosion point at prevailing air pressure\u201d LEP0<\/sub> and must be converted to standard pressure (1013 hPa) using the air pressure prevailing at the time of measurement according to the following correction formula:<\/p>\n

LEP = LEP0<\/sub> + 0,025 \u2022 (1013 – p);
\nmit LEP = corrected lower explosion point in \u00b0C; LEP0 <\/sub>= measured lower explosion point in \u00b0C und p = air pressure in hPa[\/vc_column_text][vc_row_inner rt_row_style=”global-style” rt_bg_custom_alignment=”top”][vc_column_inner width=”1\/2″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll”][vc_btn title=”Parameters for substances” style=”classic” color=”purple” i_icon_fontawesome=”fas fa-angle-left” add_icon=”true” link=”url:%2Fen%2Fbenefits%2Fparameters-for-substances%2F” el_class=”btn–red”][\/vc_column_inner][vc_column_inner width=”1\/2″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll”][vc_btn title=”Benefits” style=”classic” color=”purple” i_icon_fontawesome=”fas fa-angle-left” add_icon=”true” link=”url:%2Fen%2Fbenefits%2F|title:Benefits” el_class=”btn–red”][\/vc_column_inner][\/vc_row_inner][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"

[vc_row rt_row_background_width=”fullwidth” rt_row_content_width=”default” rt_row_style=”default-style” rt_row_borders=”” rt_row_shadows=”” rt_row_paddings=”false” rt_bg_effect=”classic” rt_bg_image_repeat=”repeat” rt_bg_size=”cover” rt_bg_position=”right top” rt_bg_attachment=”scroll” rt_bg_video_format=”self-hosted”][vc_column width=”1\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”download” rt_bg_color=”” rt_bg_overlay_color=”” offset=”vc_hidden-sm vc_hidden-xs” css=”.vc_custom_1532421990135{padding-bottom: 0px !important;}” rt_padding_bottom=”0″][vc_widget_sidebar sidebar_id=”rt-theme-20-common-sidebar”][\/vc_column][vc_column width=”2\/3″ rt_column_shadow=”” rt_bg_image_repeat=”repeat” rt_bg_size=”auto auto” rt_bg_attachment=”scroll” class=”maincontent” rt_bg_color=”” rt_bg_overlay_color=”” css=”.vc_custom_1532421960235{margin-bottom: 1em !important;padding-bottom: 0px !important;}”][vc_column_text el_class=”redborderleft”] Determination of the lower explosion point (LEP) The lower explosion …
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