We provide affordable, laser‑guided portable welding services in Des Moines, IA, delivering precise stainless‑steel joints with ±0.5 mm accuracy.

McMahan Industrial Services offers a full range of services, including aerial welding. Our mobile units cut downtime and keep projects on schedule.

Corrosion Spots on Welds

The electrochemical potential difference at the weld, due to higher Fe-C in the weld metal compared to the base metal, forms galvanic cells. Additionally, oxygen-depleted areas at the weld toes increase the rate of pitting as per ASTM G48.

A corrosion rate exceeding 0.1 mm/yr, as per ISO 12944-5, indicates unacceptable degradation. Additionally, a surface hardness above 350 HV, according to ASTM E18, is associated with greater susceptibility to corrosion.

Mitigation Strategies

• Post‑weld passivation: 5 % nitric acid dip, 10 min, reduces Fe⁺⁺/Fe³⁺ ratio by 70 % (per ASTM A967).

• Cathodic protection: Impressed current density 0.5 A/m² maintains potential ≤ ‑850 mV (per NACE TM‑01‑75).

• Protective coating: 2‑mil epoxy‑phenolic, 30 µm thickness, meets ASTM D1654 for adhesion > 5 MPa.

• Implementing proper sanitary pipe design measures ensures durability and reduces corrosion risks.

Magnetic particle testing identifies surface cracks larger than 0.2 mm as per ASTM E1444, while ultrasonic thickness testing measures wall thickness, requiring at least 3 mm in compliance with ASME BPVC Section III. 

Laser‑Guided Mobile Welding

Inconsistent weld quality and manual torch positioning result in a ±3 mm deviation from design tolerances in stainless-steel structures. This leads to a 12% increase in re-work rates and an average downtime of 4.8 hours per 100 ft weld.

Solution: Laser‑Guided Mobile Welding (LGMW) by McMahan Industrial Services

• Technology: Integrated 5 mW 635 nm laser tracker with CNC‑controlled torch on mobile unit.

• Precision: ±0.5 mm positional accuracy; weld bead deviation <0.2 mm (ISO 15614‑5).

• Performance metrics:

• 30 % reduction in weld‑pass count (average 1.4 passes vs. 2.0).

• 22 % faster installation (1.8 h/100 ft vs. 2.3 h).

• 85 % on‑site first‑pass acceptance (ASTM A36).

• Compliance: Meets OSHA 1910.252 heat protection, ISO 9001:2015 quality management, and ASTM E8 tensile testing standards.

Implementation workflow

1. Measurement: Laser scanner maps joint geometry (±0.1 mm).

2. Fabrication: CNC plasma table cuts to laser‑derived CAD model.

3. Installation: The LGMW unit aligns the torch automatically; real‑time feedback adjusts parameters (current = 150 A, voltage = 22 V).

Result: Consistent stainless‑steel welds, minimized rework, and reduced plant shutdown time.

Stainless‑Steel Laser‑Precision Expertise

Compliance: All procedures meet ASTM A240, ISO 3834‑2, and OSHA 1910.120 for laser safety.

For example, a manufacturing company specializing in stainless steel fabrication uses laser scanning technology to accurately map joint geometry before cutting with a CNC plasma table.

This precise process results in consistent welds with minimal rework, reducing plant shutdown time and ensuring compliance with industry standards such as ASTM A240 and ISO 3834-2.

Affordable Portable Welding Services in Des Moines, IA!

Ready to get your project moving with expert, affordable portable welding in Des Moines, IA? Call us today at 877‑731‑3193 or email akiger@mcmahanindustrial.com. Our friendly team will schedule a site visit, provide a detailed quote, and deliver precision welding and fabrication right where you need it.

Explore our project gallery to see our work, and read what satisfied customers say in our Google reviews. Don’t wait—contact McMahan Industrial Services now and experience fast, reliable, and high‑quality welding solutions.

Explore Des Moines, IA Attractions

Wondering what makes Des Moines a hidden gem for day-trippers? The city offers gleaming riverfront parks, sparkling art museums, and lively farmer’s markets.

1. Des Moines Riverwalk – scenic trails and river views.

2. Pappajohn Sculpture Park – quirky art pieces, perfect for photo ops.

3. Iowa State Fairgrounds—historic rides and tasty treats, a lively weekend escape.