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h�b```f``rf`e`��d�g@ ~�+�̆&�����l'��D"{�:�;D: 2@���� �ŀX,������|�u�&^�"F��wĭ���� ь���V 0000015606 00000 n
Welding ; Local Exhaust Ventilation (LEV) OSHA requires 100 feet per minute (fpm) in the zone of welding for a local exhaust hood. 0000002989 00000 n
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Adequate ventilation will keep the fumes and gases from the welder’s breathing zone. 0000008461 00000 n
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Local exhaust ventilation (LEV) is always the preferred method of removing welding fumes and gases. 0000063481 00000 n
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It exhausts or removes the toxic gases, fumes, dusts and vapours before they can mix with the room air. 0000001714 00000 n
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$�� ����@�9�J�q��A��0'�WHo����� 0��.�`y2�&�ؾ����a-H #����? 0000004824 00000 n
��E��3�d�n�(�&�̀�O��G|M���B�DrE#ғDq"5# �$L���(�pr�|�=��JAx������@��3��YYE�depQs��yFڦ����h�y:2Ĵ����6j���Fu�YY4��c��]{��#f�H��9���\E�YЧ��潡�r�v@Bʼ%%�EKB��9t>���ڬ���N�6��p�"�'�:/��E�y�=�%���D�%Ym��'�F�v��;4�m��4i�u��lG��
�O'��Τ���p��'��,K65��x\�/ h�bbd``b`: Other requirements exist for fixed enclosure welding and confined space welding. The “Ventilation Rate Procedure” (Section 6.2) in ASHRAE Standard 62.1, Ventilation for Acceptable Indoor Air Quality, prescribes the quantity of outdoor air that must be delivered to each zone, based on the expected use of that zone, and then prescribes how to calculate the outdoor airflow needed at the system-level intake. hޤVYo�6�+|ܠpyI�,�X'���,`�A��� The particular welding application is usually the number one variable that helps decipher what is recommended, but additional configurations such as HEPA or ASHRAE filters, cleanable media, multi-operators, or portability are dependent of different elements that are best discussed with a … 0000006524 00000 n
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This document introduces the reader to various types of ventilation systems, including general supply and exhaust and local exhaust, for control of welding fumes. 0000002765 00000 n
ANSI/ASHRAE 62.1-2010 . 0000002144 00000 n
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Ventilation ANSI/AIHA Z9.3-2007 . Chapter 21, “Paint Spray Operations” NFPA 91 . 0000012928 00000 n
garages, ASHRAE Applications Handbook (2015), Section 15.20 recommends (as long as permitted by local codes) that, “the ventilation airflow rate should be varied according to CO levels to conserve energy.” This recommendation is not made in Section 15.21 for Automotive Repair Facilities. ���W iF �bA���>�@� pZ
H�b```f``ac`e`�8� �� @1v�0�K^;^V>A{1~aE�y�Ţ%\Yb��k�wL}q�
�8tX���lk���>��Sxy�Z]�]��S�X������O�O�l��海�� Zf�����ˆȵYOn^{[��v�>'�D��ȵm�8�=�_nѸ���,��D���/:Ξ���Ѽ��)z��l.25� A well-designed welding helmet can help reduce a welder's exposure to welding fumes by diverting the plume away from the welder's breathing zone. )�H�i�q�p�?3:��'gp� %PDF-1.4
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NOTE: This safety and health fact sheet does not address ventilation in confined spaces. 0000018450 00000 n
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It contains or refers to information on air contaminants found in the welding fumes, principles of systems design and selection, and drawings that illustrate ventilation techniques. 54 0 obj
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�B}m0���nl*�|���y�B�e�? The minimum Ventilation is used to control overexposures to the fumes and gases during welding and cutting. 0000002337 00000 n
1926.353 (e) General welding, cutting, and heating. 30 0 obj
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1926.353 (d) (1) (iv) When inert-gas metal-arc welding is being performed on stainless steel, the requirements of paragraph (c) (2) of this section shall be met to protect against dangerous concentrations of nitrogen dioxide. trailer
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Also, the term “welding” … Society of Heating, Refrigerating and Ai r-Conditioning Engineers (ASHRAE). 0000006035 00000 n
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