Steamfitter Job Description: Duties, Skills & Requirements

Key Takeaways

• Steamfitter job descriptions vary significantly by employer type — mechanical contractors emphasize new construction skills (welding, fabrication, installation), while facilities employers prioritize maintenance diagnostics and boiler operation
• ASME code qualifications (B31.1, Section I, Section IX) appear in virtually all commercial and industrial steamfitter postings — they are not optional credentials
• Union positions (through UA locals) specify journeyman card requirements and dispatch procedures, while non-union postings focus on experience years and certifications
• The distinction between "steamfitter" and "pipefitter" in job postings matters — steamfitter postings emphasize high-pressure steam systems, boiler work, and ASME code compliance, while pipefitter postings cover broader piping systems
• Physical demands sections are not boilerplate — steamfitting genuinely requires lifting 50-80 lbs regularly, working at heights, and operating in confined spaces