BOS 4025 Unit III Case Study

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Columbia Southern University *

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4025

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Mechanical Engineering

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Apr 3, 2024

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Running head: UNIT III CASE STUDY Unit III Case Study Columbia Southern University Welding Personal Protective Equipment (PPE) Assessment 1

UNIT III CASE STUDY Working in a welding fabrication facility offers many PPE challenges. Due to the nature of some hazards, many of the hazards faced by the individual welder will also affect other workers in the area around the welder who may have no direct relation to the fabrication. Using the Occupational Safety and Health Administration (OSHA) 1910 Subpart I Appendix B, Nonmandatory Compliance Guidelines for Hazard Assessment and Personal Protective Equipment Selection, we are able to review and identify sources of hazards such as; impact, compression, heat, and light, which are common with the task of welding. Once identified, employees will be protected by various means including the use of PPE. Welders are working in designated sections of the fabrication shop. General PPE requirements for all employees in the fabrication facility are hard hat, safety glasses, and steel toe safety shoes/boots. Welders will adhere to these general PPE requirements as well. While welding, the employee will be exposed to heat and light radiation due to the welding process. Welders shall utilize the correct lens shading in their hoods in accordance with the chart supplied in OSHA 1910.252(b)(2)(ii)(G), which has been added as Appendix A. Protective clothing is required to protect the welder from the heat and light radiation generated by welding. Rated welding shirts, leather welding sleeves or a leather welding jacket shall always be used while welding along with the correct gloves. The radiant light given off by the welding process also poses a significant hazard to the employees around the designated welding area. It is not practical for all employees working around the designated welding area to be subject to the same PPE requirements as the individual welder. To protect these employees, the designated welding area should be enclosed as much as possible, using a low reflectivity paint finish on enclosures and ensuring proper ventilation 2

UNIT III CASE STUDY (OSHA, 1910.252). Barriers can be created by using a rated transparent vinyl welding screen which is designed to block sparks and harmful ultra violate radiation from other employees. Along with the actual welding, welders are subject to other hazards using portable hand grinders. General PPE requirements are still in place, along with the use of gloves and a face shield. The welder can continue to use his welding shield as a face shield, provided that his tinted lens flips up to expose a clear lens. As required in OSHA 1910.24(c)(3), vertical portable grinders being used shall have a safety guard for protection should a grinding wheel kick back or shatter. 3

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UNIT III CASE STUDY References Occupational Safety and Health Administration, (1970). Nonmandatory Compliance Guidelines for Hazard Assessment and Personal Protective Equipment Selection (Standard No. 1910 Subpart I, Appendix B). Retrieved from: https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910SubpartIAppB Occupational Safety and Health Administration, (1970). Welding Cutting and Brazing (Standard No. 1910.252). Retrieved from: https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.252 Occupational Safety and Health Administration, (1970). Guarding of portable powered tools (Standard No. 1910.243). Retrieved from: https://www.osha.gov/pls/oshaweb/owadisp.show_document? p_id=9850&p_table=STANDARDS 4

UNIT III CASE STUDY APPENDIX A 1910.252(b)(2)(ii)(H) The following is a guide for the selection of the proper shade numbers. These recommendations may be varied to suit the individual's needs. ____________________________________________________________________ | Welding operation | Shade No. _________________________________________________________|__________ | Shielded metal-arc welding - 1/16-, 3/32-, 1/8-, | 5/32-inch electrodes ................................. | 10 Gas-shielded arc welding (nonferrous) - 1/16-, 3/32-, | 1/8-, 5/32-inch electrodes .......................... | 11 Gas-shielded arc welding (ferrous) - 1/16-, 3/32-, 1/8-, | 5/32-inch electrodes ................................. | 12 Shielded metal-arc welding: | 3/16-, 7/32-, 1/4-inch electrodes .................... | 12 5/16 -, 3/8-inch electrodes .......................... | 14 Atomic hydrogen welding ................................ | 10-14 Carbon arc welding ..................................... | 14 Soldering .............................................. | 2 Torch brazing .......................................... | 3 or 4 Light cutting, up to 1 inch ............................ | 3 or 4 Medium cutting, 1 inch to 6 inches ..................... | 4 or 5 Heavy cutting, 6 inches and over ....................... | 5 or 6 Gas welding (light) up to 1/8 inch ..................... | 4 or 5 Gas welding (medium) 1/8 inch to 1/2 inch .............. | 5 or 6 Gas welding (heavy) 1/2 inch and over .................. | 6 or 8 _________________________________________________________|__________ 5

UNIT III CASE STUDY NOTE: In gas welding or oxygen cutting where the torch produces a high yellow light, it is desirable to use a filter or lens that absorbs the yellow or sodium line in the visible light of the operation. 6

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