Douglas Brothers

Your Stainless and Alloy Steels specialist for over 50 years

Who we are

We remain committed to providing superior products, high quality work, and "on time" deliveries. With our trusted reputation, project diversity, and customer satisfaction, we continue to be unmatched in our industry.

With roots dating back to 1875, our Portland, Maine location has now been in operation for over 50 years. Our services include shop fabricated piping systems, ASME code vessels, and many other specialized "custom" fabricated items. Our in house engineering and drafting capabilities provide you with detailed drawings and product data submittals to meet your project’s requirements.

We have a reputation for on time quality work.

Pre-production planning and scheduling, attention to details, adherence to specifications and our constant efforts to meet our customers’ needs have contributed to our reputation for on time quality work.

Douglas Brothers is well staffed and equipped to handle piping projects of any size and complexity. We offer complete spooling services to breakdown customers piping layouts into conveniently handled, and well identified spool pieces.

Douglas Brothers custom department is equipped to fabricate all your stainless steel custom requirements. We build to the ASME boiler and pressure vessel code, and provide equipment for Paper and Chemical plants.

Our Products

We offer spooling, agitators, vessels and other fabricated item as well as serves for mechanical drawings; take offs, small code vessels, and Isometric drawings for your project.

What We Do

Fabricated spooled piping and custom fabrication in the following alloys

  • 304/L S.S.

  • 316/L S.S.

  • 317/L S.S.

  • 2205 DUPLEX


  • Hastelloy

  • Inconel

  • Monel

  • AL6XN


Click here to view catalogue.

Technical Information

Domestic m&m available

  • ASME: ‘’U’’ Stamp

  • ASME: ‘’PP’’ Stamp

  • ASTM: A778, A312, A774 & A403

  • Hydrostatic

  • Radiographs

  • Dye Penetrant

  • PMI (positive material identification )

AIS Compliance

Domestic m&m available

Industries We Serve

Water Treatment

Wastewater Treatment




Contact Douglas Brothers

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Let's Start a Project

Get in contact with us today for a free consultation. We will respond within 2 business days.

Phone 1-800-341-0926
Email Address
Address 423 Riverside Industrial Parkway, Portland, ME 04103