What contribution does welding have to the country? Industries that use welding equipment or consumables as their main products, and industries that use welding as their key processing technology, are the backbone of defense, infrastructure, and economic construction. The combined output value of various industries related to welding accounts for 3/1 of the US gross domestic product. In 2000, the annual revenues of various industries using welding technology totaled US$3.1 trillion. According to conservative estimates by the US Department of Labor's Bureau of Statistics (BLS), 500,000 people have been employed in all industries in the United States using welding technology. However, there are still many companies that use welding technology that are not counted in this data. If these industries are added, the contribution of welding will be even greater.
The US government uses standard methods to collect data from all companies in the United States, and then tabulates and analyzes the data. The enterprise is an economic entity that has an independent business place for commercial or industrial operations. At this time, we are concerned with companies that employ welders and companies that produce welding equipment or materials. In the past, all companies had a US Standard Industrial Classification (SIC) code. After the signing of the North American Free Trade Agreement (NAFTA), Canada, Mexico and the United States need to develop a unified industry classification method. The North American Industry Classification Method (NA-ICS) was established in 1997 and three countries have issued new codes to their companies. In this way, the government statistics program needs to undergo major revisions, and this modification will take many years to complete and is currently in the revision phase, so the current data cannot be provided. ,
Each industry is assigned a NAICS code, and all companies that produce the same product or provide the same service have the same code. For example, a three-digit code is an industry code and a four-digit code is a sub-industry code. Relevant government agencies regularly collect data for each company, including the value of the production and the number of employees employed, including welders and flame cutters. These data can be used when identifying, classifying, or comparing companies.
We are interested in companies that use welding technology. The US Department of Labor's Bureau of Statistics regularly collects and publishes the number of workers employed by each company (including welders and flame cutters) and output values. Assuming that the amount of weld production depends on the number of welders, by analyzing these data, it is possible to determine which companies or industries are the largest users of welding technology. This assumption leads to large errors because some workers who work in welding (such as automatic welders) are not classified as welders. As the degree of automation of welding increases, this error will increase. Using an industry-based database, you can only determine which industries use the most arc welding because the database does not contain data for other welding methods such as electron beam welding and laser welding.
The following is a brief description of the various industries that use welding technology. The production conditions in these industries vary, welding different metals in different ways, following different welding standards and procedures.
(1) Mining, oil recovery and natural gas extraction (NA-ICS code is 211.212)
The industry includes deep and open pit mines, iron ore mines, quarries, sand and gravel fields and gravel fields. It also includes oil and gas drilling and mining companies. Normally, the industry does not use welding specifications.
(2) Large construction industry (NAICS code is 234)
The industry includes construction companies that build tunnels, subways, dams, power plants, chemical plants, steel bridges and buildings. Most of these projects involve the welding of steel structures and are subject to the relevant welding specifications. The industry also includes pipeline laying contractors, which are also subject to strict adherence to relevant welding practices.
(3) Primary metal manufacturing (NAICS code is 331)
The industry includes rolling mills, cast iron plants, foundry mills, smelters and refineries. The products produced by these companies mainly include steel plates, thin steel plates, structural negative metals, flat steel and various industrial metal castings. In this industry, welding is mainly used for equipment repair and sometimes for casting remanufacturing. Normally, the industry does not use welding specifications.
(4) Machinery manufacturing (NAICS code is 332)
The industry includes power plant boilers, pressure vessels, heat exchangers, vessels, refining equipment, trusses, machine bases, predetermined metal structures for buildings, thin sheet metal products, construction and decorative items. Welding standards and procedures should be observed in most cases.
(5) Machine manufacturing (NAICS code is 333)
The industry manufactures agricultural equipment, building materials processing equipment, etc., such as excavators, bulldozers, cranes, metal processing equipment, bending machines, shears, stamping machines, food processing equipment, textile equipment, wood processing equipment, papermaking equipment. , printing presses and office equipment. These products should normally be welded in accordance with the American Welding Society's welding standards and procedures and company welding standards. Most of the products are made of steel plates, profiles and castings.
(6) Welding equipment and brazing equipment manufacturing industry (NA-ICS code is 333992)
The industry includes manufacturers of welding power supplies, gas welding equipment, resistance welding machines, welding robots, welding torches, contact tips, gas welding torches, brazing equipment, welding rods and welding wire. These products must strictly comply with relevant safety regulations.
(7) Electrical equipment manufacturing industry (NAICS code is 335)
The industry includes manufacturers of generators, transformers, switchgear, electric motors and household appliances. The welding involved in this industry is mainly large-size welding and thin-plate welding. The industry usually does not use welding specifications.
(8) Transportation Tool Manufacturing----------Motor Vehicle Manufacturing (NAICS Code 3361)
The industry includes manufacturers of cars, trucks, buses and trailers. It also includes manufacturers of specialized components for construction vehicles. The industry typically uses welding for mass production. These manufacturers are the main users of automatic welding, resistance welding and welding robots. Welding of most of its products is subject to relevant welding standards and procedures.
(9) Transportation Tool Manufacturing----Railway Vehicle Manufacturing (NAICS Code 3365)
The industry includes manufacturers of locomotives, passenger cars, rolling trains, fast-turning vehicles, cargo compartments and railway maintenance equipment. Welding of railway vehicles must strictly comply with the relevant welding standards and regulations.
(10) Transportation tool manufacturing -------- shipbuilding (NAICS code is 3366
The welding of shipbuilding and repair processes is mainly for the welding of thick plates, the welding of space locations and the welding of all positions. Strict adherence to relevant welding standards and procedures is required.
(11) Maintenance and maintenance industry (NAICS code is 811)
The industry includes all maintenance and repair companies involved in welding. The welding involved mainly includes automobile repair welding of automobile repairing plants, as well as repair welding of industrial processing equipment, construction equipment, electrical equipment and surfacing surfaces. The industry shall comply with the relevant standards and specifications applicable to the products being repaired.
The smallest industry involved in welding technology may be sculptural work. The industry is not listed separately in NAICS, but it is of great significance to the public. The largest and most extraordinary welding sculpture in the world is the St. Louis Arch (Fig. 1.17. It is a 600 ft long stainless steel sculpture. The arch is in reverse catenary structure, designed by Eero Saarinen, Pittsburgh-Des- Moines Steel was built for the Jefferson National Development and History Association. In addition, there are many other welding sculptures and artificial fountains in the United States.
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