welding

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - (iii) See that cutting and welding are so scheduled that plant operations that might expose combustibles to ignition are not started during cutting or welding. - (d) Must secure authorization for the cutting or welding operations from the designated management representative. - (i) Must determine that the cutter or welder secures their approval that conditions are safe before going ahead. - (ii) Must determine that fire protection and extinguishing equipment are properly located at the site. - (iii) Must ensure fire watches are available at the site when required. - (15) Fire prevention precautions . You must permit cutting or welding only in areas that are or have been made fire safe. Within the confines of an operating plant or building, cutting and welding should preferably be done in a specific area designed for such work, such as a maintenance shop or a detached outside location. Such areas should be of noncombustible or fire-resistive construction, essentially free of combustible and flammable contents, and suitably segregated from adjacent areas. When work cannot be moved practically, as in most construction work, you must make the area safe by removing combustibles or protecting combustibles from ignition sources. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 18-03-159 (Order 17-24), § 296-24-[redacted postal code], filed 01/23/2018, effective 02/23/2018. Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), 296-24-[redacted postal code], filed 7/20/94, effective 9/20/94; Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted…

Source excerpt

## ［ 1. SAFETY PRECAUTIONS ］ ## P. GENERAL GUIDELINES FOR WELDING Welding work must be performed by a certified welder with sufficient experience. In addition, safety practices must be followed by any personnel involved in such work. Identify all cracks to be repaired or areas to be welded by thoroughly cleaning the suspected surface, remove paint, and check with dye penetrant or magnetic particle testing. The life expectancy of the welded area depends on the work quality and the attention given to details during welding. - ・ Turn starter key to "OFF" position. - ・ Remove negative (-) cable from battery terminal to turn off the current. - ・ Attach welder ground cable with 1 m {3.3 ft} from component being welded. If grounding cable is attached near electric parts/connectors, these electric parts/connectors may cause damaging. - ・ Attach welder ground cable near the weld area. Futhermore, the cable attached are is to be positioned at the same welding area. - ・ Make sure that neither bearing nor seal are there between the welder ground and the weld area. - ・ Do not attach the welder ground cable to the near attachment pin and/or cylinder. It causes the damage of plating. - ・ Remove paint from any surface to be welded. Painted surfaces produce unhealthy gasses when welded. - ・ Always wear protective clothing appropriate to the welding, and use protective equipment for the welding job. - ・ Perform work in a well ventilated areas. - ・ Clear the flammable items and provide the fire extinguisher. <!-- image --> ## AVOID FIRE HAZARDS - -Provide a fully charged fire extinguisher at all times while performing grinding, heating, or welding. -Clean oil and/or flammable materials from any surface to be cut. - -Protect all flammable parts and surfaces from sparks and/or flames Perform work in a well ventilated area. - -Keep sparks and flames away from paint and/or solvent. - -Keep away sparks and flames from cylinder rods, seals, electrical wires, and/or hydraulic hoses…

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ during overhead welding or cutting operations. Leather skull caps may be worn under helmets to prevent head burns. - (g) For overhead welding and cutting, or welding and cutting in extremely confined spaces, ear protection is sometimes desirable. - (h) Where there is exposure to sharp or heavy falling objects, or a hazard of bumping in confined spaces, hard hats or head protectors must be used. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Statutory Authority: RCW 49.17.010, .040, .050. 01-11-038 (Order 99-36), § 296-24-[redacted postal code], filed 05/09/01, effective 09/01/01. Statutory Authority: Chapter 49.17 RCW. 94-20-057 (Order 94-16), 296-24-[redacted postal code], filed 9/30/94, effective 11/20/94; Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted postal code], filed 5/7/73.] ## WAC 296-24-[redacted postal code] Work in confined spaces. - (1) General . As used herein confined space is intended to mean a relatively small or restricted space such as a tank, boiler, pressure vessel, or small compartment of a ship. - (2) Ventilation . Ventilation is a prerequisite to work in confined spaces. For ventilation requirements see WAC 296-24-[redacted postal code] through 296-24-[redacted postal code]. - (3) Securing cylinders and machinery . When welding or cutting is being performed in any confined spaces you must leave the gas cylinders and welding machines on the outside. Before operations are started, you must securely block heavy portable equipment mounted on wheels to prevent accidental movement. - (4) Lifelines . Where a welder must enter a confined space through a manhole or other smal…

Source excerpt

［ ## DO NOT DROP TOOLS OR PARTS Falling tools or parts may cause damage to the machine or cause unintended movement of the machine and result in serious injury or death. - · Retrieve any tools that fall immediately. - · Always secure tools or parts that are near the machine and store tools properly after maintenance is complete. ## GENERAL GUIDELINES FOR WELDING Contact your KOBELCO authorized dealer before welding on the machine. Welding could damage wires, electronic processors, hoses, and tubes. Do not weld tanks or lines that contain flammable fluids or flammable material. Empty and purge the lines and tanks. Then clean the lines and tanks with a nonflammable solvent prior to welding or flame cutting. To prevent serious injury or possible fire, welding work must be performed by a certified welder at a facility with welding devices suitable for the task. ## BASIC PRECAUTIONS FOR WELDING AND GRINDING - · Before welding, select a location away from flammable items and have a fire extinguisher nearby. - · Perform work in a well-ventilated area. - · Always wear protective gears appropriate for welding. - · Turn the engine off and remove the key. - · Disconnect the negative (-) cable from its battery terminal. When the battery power-off switch is provided, set it to "OFF". - · Remove or adequately shield all components, hoses, tubes, and wires in the area. - · Ensure that the components are properly grounded in order to avoid unwanted arcs. Attach the welder ground cable directly to the area within 1 m (3 ft.) from the part to be welded and on the same parent material. If the welder ground cable is attached to the area near electric parts/connectors, these electric parts/connectors may be damaged. - · Make sure neither the bearing nor the bearing seal is between the welder ground cable and the part to be welded. - · Do not attach the welder ground cable near the pin or cylinder. It will damage the plating on the pin or cylinder. - · Remove paint from any surfa…

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - Note: In gas welding or oxygen cutting where the torch produces a high yellow light, is not desirable to use a filter or lens that absorbs the yellow or sodium line in the visible light of the operation. - (j) All filter lenses and plates must meet the test for transmission of radiant energy prescribed in ANSI Z 87.1-1968--American National Standard Practice for Occupational and Educational Eye and Face Protection. - (3) Protection from arc welding rays . Where the work permits, the welder should be enclosed in an individual booth painted with a finish of low-reflectivity such as zinc oxide (an important factor for absorbing ultraviolet radiations) and lamp black, or must be enclosed with noncombustible screens similarly painted. Booths and screens must permit circulation of air at floor level. You must protect workers or other persons adjacent to the welding areas from the rays by noncombustible or flameproof screens or shields or they must be required to wear appropriate goggles. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Statutory Authority: RCW 49.17.010, .040, .050. 01-11-038 (Order 99-36), § 296-24-[redacted postal code], filed 05/09/01, effective 09/01/01. Statutory Authority: Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted postal code], filed 5/7/73.] ## WAC 296-24-[redacted postal code] Protective clothing. - (1) General requirements . You must protect employees exposed to the hazards created by welding, cutting, or brazing operations by personal protective equipment in accordance with the requirements of chapter 296-24 WAC, Part I, and WAC [redacted identifier]. Appropriate prote…

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - (7) Relocation of combustibles . Where practicable, you must relocate all combustibles at least 35 feet from the work site. Where relocation is impracticable, you must protect combustibles with flame proofed covers or otherwise shielded with metal or curtains. Edges of covers at the floor should be tight to prevent sparks from going under them. This precaution is also important at overlaps where several covers are used to protect a large pile. - (8) Ducts . You must suitably protect or shut down ducts and conveyor systems that might carry sparks to distant combustibles. - (9) Combustible walls . Where cutting or welding is done near walls, partitions, ceiling or roof of combustible construction, you must provide fire-resistant shields or guards to prevent ignition. - (10) Noncombustible walls . If welding is to be done on a metal wall, partition, ceiling or roof, you must take precautions to prevent ignition of combustibles on the other side, due to conduction or radiation, preferably by relocating combustibles. Where combustibles are not relocated, you must provide a fire watch on the opposite side from the work. - (11) Combustible cover . You must not attempt welding on a metal partition, wall, ceiling or roof having a combustible covering nor on walls or partitions of combustible sandwichtype panel construction. - (12) Pipes . You must not undertake cutting or welding on pipes or other metal in contact with combustible walls, partitions, ceilings or roofs if the work is close enough to cause ignition by conduction. - (13) Management . Management must recognize its responsibility for the safe usage of cutting and welding equipment on its property and: - (a) Based on fire potentials of plant facilities, establish areas for cutting and welding, a…

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ - (1) Hoods . Freely movable hoods intended to be placed by the welder as near as practicable to the work being welded and provided with a rate of airflow sufficient to maintain a velocity in the direction of the hood of 100 linear feet per minute in the zone of welding when the hood is at its most remote distance from the point of welding. The rates of ventilation required to accomplish this control velocity using a 3-inch wide flanged suction opening are shown in the following table: - (2) Fixed enclosure . A fixed enclosure with a top and not less than 2 sides which surround the welding or cutting operations and with a rate of airflow sufficient to maintain a velocity away from the welder of not less than 100 linear feet per minute. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted postal code], filed 5/7/73.] ## WAC 296-24-[redacted postal code] Ventilation in confined spaces. - (1) Air replacement . You must adequately vent all welding and cutting operations carried on in confined spaces to prevent the accumulation of toxic materials or possible oxygen deficiency. This applies not only to the welder but also to helpers and other personnel in the immediate vicinity. All air replacing that withdrawn must be clean and respirable. - (2) Airline respirators . In such circumstances where is not impossible to provide such ventilation, you must use airline respirators or hose masks approved for this purpose by the National Institute for Occupational Safety and Health (NIOSH) under 42 CFR Part 84. - (3) Self-contained units . In areas immediately hazardou…

Source excerpt

\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ hour or overnight. Where practicable, you must also remove the torch and hose from the confined space. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted postal code], filed 5/7/73.] ## WAC 296-24-700 Protection of employees. [Order 73-5, 296-24-700, filed 5/9/73 and Order 73-4, 296-24-700, filed 5/7/73.] ## WAC 296-24-[redacted postal code] General. - (1) Railing . You must protect a welder or helper working on platforms, scaffolds, or runways against falling. This may be accomplished by the use of railings, safety belts, life lines, or some other equally effective safeguards. - (2) Welding cable . Welders must place welding cable and other equipment so that is clear of passageways, ladders, and stairways. [Statutory Authority: RCW 49.17.010, .040, .050, and .060. 15-24-100 (Order 15-04), § 296-24-[redacted postal code], filed 12/01/2015, effective 01/05/2016. Order 73-5, 296-24-[redacted postal code], filed 5/9/73 and Order 73-4, 296-24-[redacted postal code], filed 5/7/73.] ## WAC 296-24-[redacted postal code] Eye protection. ## (1) Selection . - (a) You must use helmets or hand shields during all arc welding or arc cutting operations, excluding submerged arc welding. Goggles should also be worn during arc welding or cutting operations to provide protection from injurious rays from adjacent work, and from flying objects. The goggles may have either clear or colored glass, depending upon the amount of exposure to adjacent welding operations. You must provide helpers or attendants with proper eye protection. - (b) You must use goggles or oth…