Requirements for premises for electric welding installations and welding stations

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 7. Electrical equipment of special installations

Electrical installations. Requirements for premises for electric welding installations and welding stations

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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7.6.33. Premises and buildings of assembly and welding shops and areas with electric welding installations and welding stations located in them, as well as ventilation devices must meet the requirements of current regulatory documents.

7.6.34. For electric welding installations and welding stations intended for permanent electric welding in buildings outside welding and assembly shops and areas, special ventilated rooms should be provided, fenced off with type 1 fire partitions, if they are located adjacent to rooms of categories A, B and C according to explosion hazard, and the 2nd type in other cases. The area and volume of such premises and their ventilation systems must comply with the requirements of the current sanitary rules and SNiP, taking into account the dimensions of the welding equipment and products to be welded.

7.6.35. Welding stations may be located in explosion and fire hazardous areas only during the period of temporary electric welding performed in compliance with the requirements set forth in the standard instructions for organizing the safe conduct of hot work at explosion and fire hazardous objects, approved by the Gosgortekhnadzor of Russia.

7.6.36. In rooms for electric welding installations, passages of at least 0,8 m should be provided to ensure the convenience and safety of welding operations and the delivery of products to the welding site and back.

7.6.37. The area of a separate room for electric welding installations must be at least 10 m2, and the area free from equipment and materials must be at least 3 m2 for each welding station.

7.6.38. Welding stations for the systematic performance of manual arc welding or welding in a shielding gas environment of small and medium-sized products directly in production shops in non-flammable and non-explosive areas should be placed in special cabins with walls made of fireproof material.

The cabin depth must be at least twice the length, and the width must be at least one and a half lengths of the products to be welded, however, the cabin area must be at least 2x1,5 m. When installing a welding power source in the cabin, its dimensions must be increased accordingly. The height of the cabin walls must be at least 2 m, the gap between the walls and the floor - 50 mm, and when welding in a shielding gas environment - 300 mm. In the case of movement above the cabin of an overhead crane, its top must be covered with a mesh with cells no larger than 50x50 mm.

7.6.39. Work at welding stations during non-systematic manual arc welding, submerged arc welding and electroslag welding is allowed directly in fire hazardous rooms, provided that the place of work is fenced with shields or curtains made of non-combustible materials with a height of at least 1,8 m.

7.6.40. Electric welding installations for systematic welding of products weighing more than 20 kg on them must be equipped with appropriate lifting and transport devices to facilitate the installation and transportation of the products to be welded.

7.6.41. Natural and artificial lighting of electric welding installations of assembly and welding shops, areas, workshops, individual welding posts (welding booths) and welding places must meet the requirements of SNiP 23-05-95 "Natural and artificial lighting. Design standards".

7.6.42. In manual welding with thickly coated electrodes, electroslag welding, submerged arc welding and automatic open arc welding, exhaust gases must be provided directly from the welding zone.

7.6.43. At welding stations for open arc welding and submerged arc welding inside tanks, closed cavities and structures, ventilation must be provided in accordance with the nature of the work performed. If the necessary ventilation is not possible, forced supply of clean air under the welder's mask in the amount of 6-8 m3/h should be provided.

7.6.44. Sheds made of non-combustible materials should be built over portable and mobile electric welding installations located in the open air to protect the workplace of the welder and electric welding equipment from atmospheric precipitation.

Canopies may not be built if the electrical equipment of the electric welding installation has shells with a degree of protection corresponding to the conditions of work in outdoor installations, and during rain and snowfall, electric welding will stop.

See other articles Section Rules for the installation of electrical installations (PUE).

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