Piping Case Study

CTS Case Study #: 05821-45-55-95-188

Unit Size: Random to 20 feet

Opportunity: A customer was behind on the piping for 4 compressor packages and 4 lube oil systems. They requested for us to make the piping spools with identified field welds. They supplied the isometric drawings. Requirements: AMSE B31.1, 316SS, Carbon Steel, X-Ray, PMI, NACE, Material Test Reports.

Solution:We supplied 1,092 spool pieces to Saudi Arabia. They gave us the drawings which required many corrections. Our purchasing group and the manufacturing group reviewed the drawings for errors both in material sizes and dimensions. Once we were satisfied that the drawings were correct, we fabricated the spools. The pieces had some complicated geometries. Only two pieces out of the 1,092 were cut apart in the field because they did not fit up correctly. The dossier included weld maps with welder identification, heat numbers, PMI records and reports, dimensional checks, material test reports, and weld buttons. We arranged the export to Saudi Arabia.

Major Steel Manufacturer, Ohio
Waste Acid Bulk Storage


This major steel manufacturer was founded in 1900 in and established the first formal research department in the steel industry in 1910. It grew through the development of specialty steels and new technology. Among the many "firsts" was the development of continuous rolling technology. This company holds more U.S. patents than any other specialty steel company.

Today, the Specialty Flat-Rolled Steels segment produces flat-rolled chrome stainless, specialty stainless sheet and strip, electrical steels and galvanized steels. As measured by production and shipped tons, the company is the largest specialty steel company in the United States.


However, as the company grows in size, so too does its environmental and safety concerns. As part of its efforts to reduce its environmental expenses and maintain a high level of safety in its manufacturing facilities, it had Mech-Chem inspect, test, and certify its waste acid storage tanks. Four bulk storage systems ranging in size from 10,000 gallons to 40,000 gallons were inspected and certified. Mech-Chem then went on to design a new waste acid bulk storage facility and related piping system to handle their waste acid production.


The testing and inspection of the waste acid storage tanks included:

  • Visual internal inspection
  • Visual external inspection
  • Spark testing of the tank liners
  • Nondestructive ultrasonic thickness survey tests of the tank shell and heads

An engineering report, including a CAD drawing for each tank showing results of the nondestructive ultrasonic thickness survey and tests, was prepared to submit to the Ohio EPA.

The inspection, structural analysis, and certification of the secondary containment systems also included:

  • Visual inspection
  • Structural integrity analysis
  • Calculate containment capacity
  • Materials of construction
  • Structural and mechanical review of the design for compliance with Ohio EPA waste management regulations

An additional engineering report was generated outlining the results of the inspection and structural analysis of the secondary containment.

As a result of our familiarity with the company's bulk storage systems, Mech-Chem was also contracted to engineer and design a waste acid bulk storage facility and related piping systems. The waste acid bulk storage facility consists of eight process and storage tanks varying in size from 5,000 gallons to 40,000 gallons.

The waste acids piped and stored in this system include Hydrofluoric Acid (HF), Nitric Acid (HNO3), Hydrochloric Acid (HCl), and Sulfuric Acid (H2SO4). The handling of these various acid mixtures present unique material of construction requirements including specialized tank liners, coatings for the containment dikes, polypro lined steel pipe and NEMA 4X electrical design.

The bulk storage facility and piping systems are designed to handle 20,000 gallons per day of various hot (160 F) waste acid mixtures. The facility design provides for secondary containment for the process tanks, storage tanks, pumps, piping, and loading and unloading of tank wagons.


The company not only ensured that its existing tanks met all the necessary OSHA codes and EPA regulations, but it also acquired a new, fully automated PLC controlled bulk storage and piping system designed by Mech-Chem.

  • 25,000 Gallon Waste Acid Storage Tank With Secondary Containment25,000 Gallon Waste Acid Storage Tank With Secondary Containment
  • 30,000 Gallon Used Acid Storage Tank.30,000 Gallon Used Acid Storage Tank.
  • 40,000 Gallon Waste Acid Storage Tank With Secondary Containment40,000 Gallon Waste Acid Storage Tank With Secondary Containment
  • Second View Of 40,000 Gallon Waste Acid Storage Tank With Secondary ContainmentSecond View Of 40,000 Gallon Waste Acid Storage Tank With Secondary Containment
  • 30,000 Gallon Tank30,000 Gallon Tank
  • Process Transfer StationProcess Transfer Station

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