Vessel Fabrication

Freitag-Weinhardt specializes in pressure vessels meeting ASME code and non-code vessels meeting our customer's requirements; using carbon steel, stainless steel or special alloys to meet customer specifications. Our services include design, construction, fabrication, assembly, non-destructive examination, inspections, testing, delivery and installation.

With the extensive experience and high skill-level employees, Freitag-Weinhardt has developed a industry leading quality control program for the fabrication and repair of ASME code compliant pressure vessels that conform to, or exceed industry standards. Quality Elements include: Quality Control Program, over 100 Qualified Welding Procedures, Certified Welders, Certified Welder Inspectors (CWI), Authorized Inspector (AI) service, Incoming Material Inspections, with NDE options of: X ray, Ultrasonic, Magnetic Partial, Dye Penetrant.

Freitag-Weinhardt maintains ASME certifications for Pressure Vessels(U-stamp) and Power Boilers (S-stamp), along with National Board of Boiler and Pressure Vessel Inspectors (R-Stamp). With these certifications we fabricate new code vessels in our fabrication facility. We can also alter or modify existing pressure vessels in our fabrication facility or in the field.

Code Stamps

  • ASME Section VIII (U) - Pressure Vessels (Certification # 12152)
  • ASME Section 1 (S) - Power Boilers (Certification #12171)
  • National Board of Boiler and Pressure Vessel Inspectors - (R) Stamp (Certification # 2832)
  • ASME B31.1 - Power Piping - Boiler External Piping (PP) Stamp (Certification # 7777)


Welding Processes

  • GMAW (Gas Metal Arc Welding)
  • SMAW (Shielded Metal Arc Welding)
  • GTAW (Gas Tungsten Arc Welding)
  • FCAW (Flux-Cored Arc Welding)
  • SAW (Submerged Arc Welding)
  • GMAW-P (Pulsed Gas Metal Arc Welding)



  • Maximum Diameter: 120"
  • Maximum Length: 100'
  • Maximum Weight: 4 tons