Thread Content
General requirements for safety in welding and cutting operations. Serial number, Item name, Standard requirements, Basis for requirements, Validity clause: 1. Appoint on-site management and safety supervision personnel – On-site management and safety supervision personnel should be assigned at welding or cutting sites. Article 3.2.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates the assignment of fire watch personnel. Fire watch personnel should be stationed at the following welding or cutting sites as well as at locations where fires may occur: 1. Areas near flammable materials: Flammable materials in building structures or materials that are within 10 meters of the work site. 2. Openings: Exposed flammable materials are present within a 10-meter radius of any openings in walls or floors (including concealed spaces within the walls or floors). 3. Metal walls: Flammable materials located on the opposite side of metal partitions, walls, ceilings, roofs, etc., which can be ignited due to heat transfer or radiation. Article 6.4.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that, for welding and cutting operations to be approved, the required safety conditions must be met ； Welding or cutting operations may be carried out only with the permission of the site managers and supervisors. When the conditions for obtaining permission remain unchanged, the operator can continuously perform welding or cutting. Paragraph 2 of Article 3.2.3 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that welding and cutting operations must be carried out in areas that have been designed, constructed (or specially designated) to reduce the risk of fires. When welding or cutting operations need to be carried out in areas not designated for such purposes due to special reasons, approval through inspection is mandatory. Article 6.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that warning signs be installed in welding and cutting areas; these areas must be clearly marked, and appropriate warning signs must be in place. Article 4.1.2 of \"Safety in Welding and Cutting\" (GB9448—1999) requires that warning signs for occupational hazards be installed in areas where smoke, gases, arc light, sparks, electric shock, heat, radiation, and noise generated by welding and cutting operations may pose hazards; appropriate warning signs should be used to ensure that people are fully aware of these hazards. Article 9 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that protective screens be installed. To prevent workers or other people in nearby areas from being harmed by the radiation and splashes generated by welding and cutting arcs, non-flammable or fire-resistant screens (or shields) should be used for isolation and protection. Article 4.1.3 of \"Safety in Welding and Cutting\" (GB9448—1999) requires that welding booths be installed in areas where welding operations are permitted; when necessary, they can be separated using non-flammable screens or enclosures to form welding booths. Article 4.1.4 of \"Safety in Welding and Cutting\" (GB9448—1999) recommends that the principles for selecting protective equipment be based on the \"Specifications for the Selection of Personal Protective Equipment\" (GB/T-11651). Article 4.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates specific requirements for the selection of protective equipment. The personal protective equipment that can be used in tasks involving intense light includes: 1. Goggles or face shields that provide protection against intense light, ultraviolet rays, and infrared rays ； 2. Welding mask ； 3. Welding gloves ； 4. Welding protective shoes ； 5. Welding protective clothing ； 6. White canvas thermal protective clothing. Article 6.1 of the \"Specifications for the Selection of Personal Protective Equipment\" (GB/T-11651) recommends that when workers need to observe arcs, they must use hoods or face shields equipped with filters, or wear safety glasses, goggles, or other appropriate eye protection ； Clause 4.2 of “Safety in Welding and Cutting” (GB9448—1999) mandates that all welders and cutters must wear flame-resistant protective gloves. Article 4.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that fire hazards must be eliminated; welding or cutting operations can only be carried out in conditions free from such hazards. 1. Whenever possible, the workpiece should first be moved to a designated safe area for welding ； 2. When the workpiece cannot be moved, all movable items surrounding the fire hazard should be moved to a safe location ； 3. When the workpiece and the fire source cannot be moved, measures must be taken to control the fire source to prevent a fire from breaking out. Article 6.3 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that sufficient fire extinguishing equipment must be available at locations where welding and cutting operations are carried out. Article 6.4.1 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates safety measures for oxygen-gas welding and cutting. Sequence Number, Item Name, Standard Requirements, Basis for Requirements, Validity Clause: 1. Isolation of oxygen from combustibles – Oxygen cylinders, cylinder valves, fittings, pressure regulators, hoses, and equipment must be separated from oils, lubricants, and other combustible substances. It is strictly prohibited to touch oxygen cylinders or oxygen equipment with oily hands or gloves with oil stains. Article 10.1.2 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that gas cylinders must be stored in locations where they will not suffer physical damage or where the temperature of the substances stored inside them does not exceed 40°C. Paragraph 1 of Article 10.5.3 in “Safety in Welding and Cutting” (GB9448—1999) stipulates that gas cylinders must be stored in designated locations away from elevators, stairways, or passageways, where they cannot be knocked over or damaged by passing objects or falling items. During storage, gas cylinders must be secured to prevent them from toppling over. Paragraph 2 of Article 10.5.3 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that gas cylinders be stored away from flammable materials. When storing, gas cylinders must be separated from flammables and flammable liquids, as well as from materials that are easily ignited such as wood, paper, packaging materials, oils, etc., by at least 6 meters, or they must be separated by a non-flammable partition at least 1.6 meters high. Paragraph 3 of Article 10.5.3 of \"Safety for Welding and Cutting\" (GB9448—1999) mandates that gas cylinders must be placed firmly in an upright position at the site of use, or mounted on specialized vehicles/frames or fixing devices. Article 10.5.4 of \"Safety in Welding and Cutting\" (GB9448—1999) mandates that at work sites where acetylene cylinders are used, the storage volume of acetylene shall not exceed 30 m3 (equivalent to 5 cylinders, referring to acetylene cylinders with a nominal capacity of 40 L; the same applies hereafter) ； Article 63, Item 1 of the \"Safety Supervision Regulations for Dissolved Acetylene Cylinders\" mandates that cylinders must not be placed in areas exposed to direct sunlight, heat sources, or where there is a risk of electric shock, and they should also be kept at a distance from the point where work is being carried out. Gas cylinders must be kept at a sufficient distance from the actual welding or cutting site (usually more than 5 meters) to avoid coming into contact with sparks, hot slag, or flames; otherwise, a fire-resistant barrier must be provided. Paragraph 1 of Article 10.5.4 of \"Safety in Welding and Cutting\" (GB9448—1999) requires that the distance between acetylene cylinders and open flames be maintained at least at 10 m; the location where acetylene cylinders are stored must not be near heat sources or electrical equipment. When working at heights, this distance refers to the vertical projection from the ground level. Article 63, Item 1 of the \"Safety Supervision Regulations for Dissolved Acetylene Cylinders\" mandates that when acetylene and oxygen cylinders are to be transported together, special trolleys should be used for transportation. If it is necessary to place both acetylene and oxygen cylinders on the same trolley, they must be separated by a partition made of non-flammable material. Article 64, Item 7 of the \"Safety Supervision Regulations for Dissolved Acetylene Cylinders\" mandates that no items shall be placed on the upper part of the cylinder. When in use, items must not be placed on the upper part of the cylinder to prevent damage to the safety devices or interference with the rapid closing of the valves. After use, the cylinder valve must be closed tightly. Article 10.5.6 of “Safety in Welding and Cutting” (GB9448—1999) is mandatory