Establishments primarily engaged in manufacturing power and marine boilers, pressure and nonpressure tanks, processing and storage vessels, heat exchangers, weldments and similar products, by the process of cutting, forming and joining metal plates, shapes, bars, sheet, pipe mill products and tubing to custom or standard design, for factory or field assembly. Establishments primarily engaged in manufacturing warm air heating furnaces are classified in Industry 3585; those manufacturing other nonelectric heating apparatus, except power boilers, are classified in Industry 3433; those manufacturing household cooking apparatus are classified in Industry 3631; and those manufacturing industrial process furnaces and ovens are classified in Industry 3567.
| Absorbers, gas | Intercooler shells |
| Accumulators (industrial pressure vessels) | Jackets, industrial: metal plate |
| Acetylene cylinders | Kettles (process vessels), metal plate |
| Aftercooler shells | Knockouts, free water: metal plate |
| Air preheaters, nonrotating: plate type | Ladles, metal plate |
| Air receiver tanks, metal plate | Liners, industrial: metal plate |
| Airlocks | Liquid oxygen tanks, metal plate |
| Annealing boxes, pots, and covers | Melting pots, for metal |
| Atomic waste casks | Missile silos and components, metal plate |
| Autoclaves, industrial | Mixers for hot metal |
| Baffles | Nuclear core structurals, metal plate |
| Bails, ladle | Nuclear shielding, metal plate |
| Bins, prefabricated metal plate | Oil storage tanks, metal plate |
| Boiler shop products: industrial boilers, smokestacks, and steel tanks | Penstocks, metal plate |
| Boilers: industrial, power, and marine | Perforating on heavy metal |
| Boxes, condenser: metal plate | Pile shells, metal plate |
| Breechings, metal plate | Pipe, large diameter: metal plate—made by plate fabricators |
| Buoys, metal | Plate work, fabricated: cutting, punching, bending, and shaping |
| Cable trays, metal plate | Precipitators (process vessels), metal plate |
| Caissons, metal plate | Pressure vessels, industrial: metal plate—made in boiler shops |
| Cars for hot metal | Pressurizers and auxiliary equipment, nuclear: metal plate |
| Casing, boiler: metal plate | Reactor containment vessels, metal plate |
| Casings, scroll | Reactors, nuclear: military and industrial |
| Chutes, metal plate | Retorts, industrial |
| Condensers, barometric | Rocket transportation casings |
| Condensers, steam | Separators, industrial process: metal plate |
| Containers, shipping metal plate (bombs, etc.)except missile casings | Septic tanks, metal plate |
| Cooling towers, metal plate | Skid tanks, metal plate |
| Cryogenic tanks, for liquids and gases: metal plate | Smelting pots and retorts |
| Culverts, metal plate | Smokestacks, boiler plate |
| Cupolas, metal plate | Space simulation chambers, metal plate |
| Cyclones, industrial: metal plate | Spheres, for liquids or gas: metal plate |
| Cylinders, pressure: metal plate | Standpipes |
| Digesters, process: metal plate | Steam jet after coolers |
| Ducting, metal plate | Steam jet inter condensers |
| Economizers (boilers) | Sterilizing chambers, metal plate |
| Evaporators (process vessels), metal plate | Stills, pressure: metal plate |
| Exchangers, heat: industrial, scientific, and nuclear | Storage tanks, metal plate |
| Farm storage tanks, metal plate | Surge tanks, metal plate |
| Fermenters (process vessels), metal plate | Tanks for tank trucks, metal plate |
| Floating covers, metal plate | Tanks, metal plate: lined |
| Flumes, metal plate | Tanks, standard and custom fabricated: metal plate—made in boiler |
| Forms, collapsible: for tunnels | Towers, tank: metal plate |
| Fractionating columns, metal plate | Towers: bubble, cooling, fractionating—metal plate |
| Fuel tanks, metal plate | Trash racks, metal plate |
| Fumigating chambers, metal plate | Troughs, industrial metal plate |
| Gas holders, metal plate | Truss plates, metal |
| Gas tanks, metal plate | Tunnel lining, metal plate |
| Heat transfer drives (finned tubing) | Tunnels, vacuum: metal plate |
| High vacuum coaters, metal plate | Tunnels, wind |
| Hoods, industrial: metal plate | Vacuum tanks, metal plate |
| Hooks, crane: laminated plate | Vats, metal plate |
| Hoppers, metal plate | Vessels, process and storage: metal plate (made in boiler shops) |
| Housing cabinets for radium, metal plate | Water tanks, metal plate |
| Housings, pressure | Weldments |
| Hydropneumatic tanks, metal plate | |
| Codes |
Titles | Total Marketable US Businesses |
| 34430000 | Fabricated plate work (boiler shop) | 842 |
| 34430100 | Industrial vessels, tanks, and containers | 169 |
| 34430101 | Autoclaves, industrial | 7 |
| 34430102 | Bins, prefabricated metal plate | 14 |
| 34430103 | Columns (fractioning, etc.): metal plate | 0 |
| 34430104 | Cryogenic tanks, for liquids and gases | 35 |
| 34430105 | Cyclones, industrial: metal plate | 1 |
| 34430106 | Digesters, process: metal plate | 1 |
| 34430107 | Drums, knockout (reflux etc.): metal plate | 0 |
| 34430108 | Dumpsters, garbage | 338 |
| 34430109 | Farm storage tanks, metal plate | 7 |
| 34430110 | Fuel tanks (oil, gas, etc.), metal plate | 76 |
| 34430111 | Gas holders, metal plate | 1 |
| 34430112 | Hoppers, metal plate | 2 |
| 34430113 | Housings, pressure | 23 |
| 34430114 | Jackets, industrial: metal plate | 2 |
| 34430115 | Process vessels, industrial: metal plate | 18 |
| 34430116 | Separators, industrial process: metal plate | 10 |
| 34430117 | Spheres, for liquids or gas: metal plate | 0 |
| 34430118 | Stills, pressure: metal plate | 3 |
| 34430119 | Tank towers, metal plate | 11 |
| 34430120 | Tanks for tank trucks, metal plate | 34 |
| 34430121 | Tanks, lined: metal plate | 44 |
| 34430122 | Tanks, standard or custom fabricated: metal plate | 236 |
| 34430123 | Towers (bubble, cooling, fractionating, etc.): metal plate | 8 |
| 34430124 | Trash racks, metal plate | 13 |
| 34430125 | Vats, metal plate | 2 |
| 34430126 | Vessels, process or storage (from boiler shops): metal plate | 31 |
| 34430127 | Water tanks, metal plate | 47 |
| 34430200 | Heat exchangers, condensers, and components | 146 |
| 34430201 | Air coolers, metal plate | 29 |
| 34430202 | Air preheaters, nonrotating: plate type | 3 |
| 34430203 | Barometric condensers | 1 |
| 34430204 | Condenser boxes, metal plate | 0 |
| 34430205 | Condensers, steam | 3 |
| 34430206 | Cooling towers, metal plate | 54 |
| 34430207 | Finned tubes, for heat transfer | 13 |
| 34430208 | Heat exchangers, plate type | 36 |
| 34430209 | Heat exchangers: coolers (after, inter), condensers, etc. | 64 |
| 34430300 | Boiler and boiler shop work | 28 |
| 34430301 | Boiler casing, metal plate | 1 |
| 34430302 | Boiler shop products: boilers, smokestacks, steel tanks | 25 |
| 34430303 | Boilers: industrial, power, or marine | 28 |
| 34430304 | Economizers (boilers) | 5 |
| 34430400 | Plate work for the metalworking trade | 23 |
| 34430401 | Annealing boxes, pots, or covers | 1 |
| 34430402 | Cars, for hot metal | 7 |
| 34430403 | Mixers, for hot metal | 2 |
| 34430404 | Pots: annealing, melting, or smelting | 6 |
| 34430405 | Retorts, industrial: smelting, etc. | 1 |
| 34430500 | Plate work for the nuclear industry | 2 |
| 34430501 | Atomic waste casks | 1 |
| 34430502 | Housing cabinets for radium, metal plate | 4 |
| 34430503 | Nuclear core structurals, metal plate | 2 |
| 34430504 | Nuclear reactors, military or industrial | 20 |
| 34430505 | Nuclear shielding, metal plate | 3 |
| 34430506 | Pressurizers or auxiliary equipment, nuclear: metal plate | 4 |
| 34430507 | Reactor containment vessels, metal plate | 8 |
| 34430600 | Liners/lining | 15 |
| 34430601 | Liners, industrial: metal plate | 7 |
| 34430700 | Metal parts | 148 |
| 34430701 | Baffles | 7 |
| 34430702 | Breechings, metal plate | 1 |
| 34430703 | Cable trays, metal plate | 9 |
| 34430704 | Crane hooks, laminated plate | 1 |
| 34430705 | Floating covers, metal plate | 1 |
| 34430800 | Chutes and troughs | 8 |
| 34430801 | Chutes, metal plate | 5 |
| 34430802 | Flumes, metal plate | 2 |
| 34430803 | Penstocks, metal plate | 1 |
| 34430804 | Troughs, industrial: metal plate | 0 |
| 34430900 | Pipe, standpipe, and culverts | 7 |
| 34430901 | Culverts, metal plate | 5 |
| 34430902 | Pipe, large diameter: metal plate | 10 |
| 34430903 | Standpipes | 0 |
| 34431000 | Wind and vacuum tunnels | 0 |
| 34431001 | Vacuum tunnels, metal plate | 2 |
| 34431002 | Wind tunnels | 13 |
| 34431100 | Chambers and caissons | 7 |
| 34431101 | Airlocks | 7 |
| 34431102 | Caissons, metal plate | 0 |
| 34431103 | Fumigating chambers, metal plate | 2 |
| 34431104 | Space simulation chambers, metal plate | 0 |
| 34431105 | Sterilizing chambers, metal plate | 2 |
| 34439901 | Buoys, metal | 6 |
| 34439902 | Containers, shipping (bombs, etc.): metal plate | 30 |
| 34439903 | Cupolas, metal plate | 3 |
| 34439904 | Cylinders, pressure: metal plate | 37 |
| 34439905 | Ducting, metal plate | 8 |
| 34439906 | High vacuum coaters, metal plate | 5 |
| 34439907 | Hoods, industrial: metal plate | 4 |
| 34439908 | Ladle bails | 0 |
| 34439909 | Ladles, metal plate | 0 |
| 34439910 | Missile silos and components, metal plate | 2 |
| 34439911 | Perforating on heavy metal | 9 |
| 34439912 | Rocket transportation casings | 1 |
| 34439913 | Scroll casings | 1 |
| 34439914 | Smokestacks, boiler plate | 2 |
| 34439915 | Truss plates, metal | 29 |
| 34439916 | Weldments | 50 |
