Welding

American Alloy Fabricators, Inc. manufactures custom process equipment for the chemical, pharmaceutical, and biotechnology sectors. We deliver specialized welding services to build ASME pressure vessels, chemical reactors, and complex process piping. Engineering and procurement teams rely on our welding capabilities to process demanding stainless steel and exotic alloy components safely.

Review our specialized joining processes, rigorous contamination controls, and non-destructive testing protocols below.

Extensive Welding Capabilities for Specialty Alloys

Process engineers need exact joining techniques to handle high-performance metals like Hastelloy, Inconel, and Monel. Our facility leverages advanced welding capabilities to meet specific pressure and temperature requirements.

We join dissimilar metals safely, seamlessly connecting standard stainless steel to complex superalloys without compromising joint integrity. Our equipment processes material thicknesses from 20-gauge sheet metal up to 1.25-inch thick plate to support both small lab-scale reactors and massive 25,000-gallon production tanks.

Our technicians match the specific joining process to your application requirements:

  • TIG (GTAW) welding. Used for high-purity pharmaceutical applications to achieve clean, crevice-free, and aesthetic weld beads.
  • MIG (GMAW) welding. Deployed to join heavy structural components and construct large-scale vessels efficiently.
  • Orbital welding. Utilizes automated equipment to achieve consistent 100% penetration on high-purity process piping.

Advanced Welding Services and Contamination Control

Working with exotic alloys demands specific environmental protocols to prevent structural degradation. Our dedicated welding services include physically segregated fabrication zones. We separate stainless steel processing from carbon steel operations entirely. This physical separation stops carbon dust from causing tea staining or rust on sanitary components.

During thermal joining, operators execute precise purge welding by pumping inert backing gases, like Argon, into the vessel or piping system to prevent internal oxidation.

Following fabrication, specialized post-weld treatments protect the final assembly. We execute mechanical weld blending and grinding to hit specific Roughness Average (Ra) targets, eliminating surface burrs and potential bacteria traps. Technicians then apply chemical passivation treatments to restore the material’s protective chromium-oxide layer, ensuring maximum corrosion resistance in corrosive chemical environments.

Code Compliance and Rigorous Inspection

We maintain strict documentation and testing procedures to validate every joint. Our welding procedures and personnel are qualified under ASME Boiler and Pressure Vessel Code standards. We hold active “U” and “R” stamps for pressure vessel fabrication and repair. Our AWS-certified welders maintain full traceability by generating exact Material Test Reports (MTRs) and comprehensive weld maps for every project.

We deploy multiple Non-Destructive Testing (NDE) methods to verify structural joint integrity and ensure complete code compliance:

  • Dye penetrant inspection  (PT). Reveals surface-level cracks and microscopic porosity along the weld zone.
  • Radiographic & ultrasonic testing. Verifies internal pressure boundaries and volumetric weld integrity through X-ray and ultrasonic analysis.
  • Hydrostatic & pneumatic testing. Conducts structural pressure verification to confirm the vessel’s safe handling of its specified operating limits.
  • Borescope inspection. Feeds specialized high-resolution cameras into process piping to inspect internal weld roots visually.

Secure Certified Domestic Welding Capabilities for Your Process Equipment

Procuring high-purity equipment requires partnering with an experienced, certified domestic fabrication shop. American Alloy Fabricators, Inc. delivers the exact welding capabilities necessary to build robust chemical and pharmaceutical processing systems. We execute precise welding services backed by deep non-destructive testing and exact code compliance.

Contact our engineering team to construct your next high-purity vessel today.