Energy Steel Industrial was approached by a clientfrom the clean air industry to fabricate 950,000 lbs. of steel stacks. Eight large stacks were fabricated using a variety of processes including rolling, bending, forming and MIG welding. The stacks were fabricated using a combination of material such as, A36 steel and 304 and 409 stainless steel. Each stack measured 140′ long with a diameter of 16′. We held tightest tolerances of ±” 1/8 throughout the entire fabrication process. After being painted, tested and inspected, the steel stack was delivered to New Jersey.clean air industry to fabricate 950,000 lbs. of steel stacks. Eight large stacks were fabricated using a variety of processes including rolling, bending, forming and MIG welding. The stacks were fabricated using a combination of material such as, A36 steel and 304 and 409 stainless steel. Each stack measured 140′ long with a diameter of 16′. We held tightest tolerances of ±” 1/8 throughout the entire fabrication process. After being painted, tested and inspected, the steel stack was delivered to South America.