UL 2011-2019 pdf free download

UL 2011-2019 pdf free download.Outline of Investigation for Machinery.
b) Temperature of the room;
c) Ventilation within the room; and
d) Fire protection
B 10.2 Use instructions shall include details regarding the handling of identified combustible dust material, including the use of personal protective equipment by the operator as given in 810.3—810.9.
810.3 Storage of the build matenal shall be in accordance with NFPA 654 for polymer particulate solids or NFPA 484 for metal particulate solids other local requirement as is apphcable, Polymer dusts is permitted to be kept in cardboard drums. Metal dust shall be stored and transported in metal containers, or static dissipative containers. If a polymeric liner is used, the liner shall be static dissipative.
B10.4 Filling the additive manufacturing machine with the build material, if done manually, shall be accomplished in a manner to avold creation of a dust cloud. If done automatically, the procedures for pneumatic conveying apply.
810.5 Unpacking – unpacking of the parts from the build plate shall not take place until the unit has cooled to 70’C or lower. Cleaning is to be accomplished by gently brushing down all accumulations of dust on all horizontal and vertical surfaces before the deposits are removed manually, followed by vacuuming any residual dust, wiping down all surfaces with a dry cloth, then wiping all surfaces down with a damp cloth, and finally again wiping all surfaces with a dry cloth.
B10.6 Periodic cleaning of the machine shall take place Following each build. The additive manufacturing machine shall be permitted to cool below 70C. Cleaning is to be accomplished by gently brushing down all accumulations of dust on all horizontal and vertical surfaces, followed by vacuuming any residual dust. The vacuum cleaner shall be certified for the collection of the combustible dust being used. For the collection of metal dusts, It shall be certified for use in Group E atmospheres. Wiping down all surfaces with a dry cloth, then wiping all surfaces down with a damp cloth, and finally again wiping all surfaces with a dry cloth is permitted for other than metal dusts.
810.7 Housekeeping in the vicinity of the machine is required on a regular basis so as to prevent an accumulation of combustible dust on surfaces which can result in the need to Classify the area which will require the use of explosion-protected electrical equipment.
810.8 Fugitive combustible dust in quantities that obscure the color of the surface shall first be collected by gently brushing and manually removing the accumulations, followed by vacuuming any residual dust. Light accumulations are permitted to be removed by vacuuming. The vacuum cleaner shall be certified for the collection of the combustible dust involved, Wiping down all surfaces with a dry cloth, then wiping all surfaces down with a damp cloth, and finally again wiping all surfaces with a dry cloth is permitted tot’ other than metal dusts.
B10.9 Instructions for changing and deaning of filters shall inform the user regarding precautions to be taken when certain build materials present a risk of fire when captured particles are susceptible to spontaneous combustion in the presence of air.UL 2011-2019 pdf free download.