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Ultrapure Water (UPW) Systems

At Anderson Dahlen, we help process engineers and OEMs turn high-purity designs into reality. We specialize in build-to-spec and build-to-print Ultrapure Water (UPW) systems, fabricating, assembling, and testing stainless steel vessels, skids, and piping that meet the strictest purity, documentation, and performance standards. With ASME certified welding, complete FAT testing, and clean assembly environments, we deliver the reliability, compliance, and traceability your operation depends on.

What Is Ultrapure Water (UPW)?

Ultrapure Water (UPW) is more than just clean water—it’s a fully engineered product with near-zero levels of organic, inorganic, or microbial contaminants. In industries like semiconductors, pharma, and power generation, even a single particle can compromise performance, yield, or safety. UPW systems are designed to produce, store, and distribute water with consistent, verified purity at every stage of your process.

Common Purification Stages Include:

Pre-Treatment

Activated carbon and depth filters remove chlorine, particulates, and organics.

Reverse Osmosis (RO)

Eliminates up to 98% of dissolved salts and impurities.

Electrodeionization (EDI)

Further reduces ionic content.

UV Oxidation (185/254 nm)

Breaks down organic molecules to reduce Total Organic Carbon (TOC).

Ultrafiltration (UF)

Removes bacteria, endotoxins, and nucleases.

Final Filtration

Ensures sterile, particle-free water at the point of use.

Our Role in UPW Systems

At Anderson Dahlen, we bring your purification system designs to life. Our customers and OEM partners provide the process designs, drawings, and specifications; we fabricate, assemble, and test every component with precision. Our in-house engineers can also make suggestions to your design to ensure it’s ready for fabrication. 

We Fabricate:

Tanks – Storage and mixing tanks fabricated from 304L/316L stainless steel or specialty alloys.

Pressure Vessels – Built and inspected by CWIs.

Piping Spools – Welded stainless piping built to ASME B31.3 process piping codes.

UPW Skids – Full assemblies integrating pumps, valves, tanks, and controls supplied by customers or OEMs, tested before shipment.

Control Panels – Wired, assembled, and verified during FAT at AD.

Full Mechanical Assemblies – Pre-tested for performance and cleanliness before delivery.

Precision and Purity by Design

UPW systems demand flawless welds, smooth surfaces, and materials that resist corrosion and microbial growth. Our facilities are equipped for high-purity fabrication—from orbital welding to electropolish finishing.

Key capabilities include:

  • ASME B31.3 process piping and ASME Section VIII pressure vessel certification.

  • Orbital TIG welding with full weld mapping and CWI inspection.

  • Passivation and electropolish finishes for ultra-smooth, contamination-resistant surfaces.

  • Clean assembly areas designed to minimize airborne contaminants.

  • Full traceability from material certs to FAT documentation.

Every weld, fitting, and joint is documented to meet customer standards and industry codes.

Industries We Serve

We build UPW systems and components for industries where purity equals performance.

Semiconductors & Data Centers

  • Wafer cleaning, photolithography, and cooling applications.
  • Precision piping and skids for high-volume production environments.

Pharmaceutical & Biotech

  • Systems for formulation, cleaning, and buffer prep.
  • Sanitary fabrication meeting FDA and GMP standards.

Power Generation & Nuclear

  • Skids and piping that prevent corrosion, scaling, and system fouling.
  • Stainless assemblies built to handle high-pressure, high-temperature environments.

Solar Manufacturing

  • UPW systems that reduce surface defects in panel and cell production.

Why Partner with Anderson Dahlen?

We know your reputation depends on quality, reliability, and documentation—and so does ours. That’s why we treat every project like a partnership, ensuring transparency and communication at every step.

When you work with ADI, you get:

Build-to-spec fabrication expertise backed by decades of stainless experience.

ASME and AWS certified welders and CWI inspectors ensure quality and compliance.

FAT-tested assemblies ready for on-site validation.

Complete documentation packages, including weld maps, material traceability, and surface finish records.

On-time delivery and post-FAT support, with a team that understands industrial timelines and compliance.

Quality Assurance & Documentation

From weld to shipment, we verify every process. Our Quality Assurance protocols align with customer and code requirements to ensure safety, performance, and traceability.

Our QA program includes:

  • Certified Welding Inspectors (CWIs) performing visual and dye-penetrant tests.

  • Verification of weld maps, heat numbers, and material certifications.

  • FAT testing with complete traceability documentation and inspection reports.

  • Final audits to confirm mechanical, sanitary, and dimensional compliance.

Get Started with Your UPW Project

Let’s build your next UPW system together. Whether you need a skid fabricated from existing drawings or a stainless assembly integrated with controls, Anderson Dahlen is your trusted fabrication partner.

Call 763-852-4700 or contact us online to discuss your project today.

Frequently Asked Questions

We do not provide complete UPW system designs; we focus on fabricating and assembling UPW systems to customer or OEM-supplied designs. Our in-house engineers make design suggestions to ensure the designs are ready for manufacturing.

We meet ASME B31.3 for process piping and ASME Section VIII for pressure vessels.

Yes. We offer full-surface finishing options, with documentation of Ra values and inspection reports.

Yes. All UPW skids and assemblies undergo full Factory Acceptance Testing (FAT) before shipment.

We work exclusively with 304L and 316L stainless steel for UPW systems, using electropolished and passivated finishes. When customer designs specify compatible polymer fittings (PVDF or PFA), we integrate those components into the stainless assembly as required.

Semiconductor, pharmaceutical, nuclear, power generation, solar, and biotech.

Yes. Every project includes weld maps, inspection records, and material certifications.

Yes. All projects are built-to-spec or build-to-print to meet your precise standards.

Our precision welding, clean assembly, and ASME-certified quality assurance set us apart. As a vertically integrated facility, we deliver comprehensive services to streamline your project.

Simply contact us with your drawings, P&IDs, or scope details, and we’ll provide a customized quote.

Our team is here to answer questions, provide quotes, and offer customer support. Let us know how we can help.