Boilermaker

Boilermakers earn a median salary of $67,430 – among the highest in the construction trades – and top earners exceed $101,000 per year.

This physically demanding, highly skilled trade involves building, installing, and repairing the massive pressure vessels, boilers, and tanks that power refineries, power plants, and industrial facilities across the country. With a four-year apprenticeship and strong welding skills, boilermakers enter a niche trade with serious earning potential and the kind of job security that comes from work most people cannot do.

What Does a Boilermaker Do?

Boilermakers construct, assemble, maintain, and repair stationary steam boilers, pressure vessels, tanks, and vats used in industrial processes. They work with thick steel plate, heavy structural components, and high-pressure systems where precision is not optional – a failed weld on a pressure vessel can be catastrophic.

Core responsibilities include:

• Fabrication and assembly: Reading blueprints to lay out, cut, fit, and weld large steel plates and structural sections into boilers, tanks, and pressure vessels
• Installation: Positioning and connecting boiler components, piping, and auxiliaries at power plants, refineries, and manufacturing facilities
• Maintenance and repair: Performing scheduled shutdowns (turnarounds) to inspect, clean, repair, and replace boiler tubes, refractory linings, and pressure parts
• Welding: Executing high-quality welds (SMAW, GMAW, FCAW, GTAW) on carbon steel, stainless steel, and alloy materials that must pass rigorous inspection and testing
• Rigging and erection: Using cranes, chain falls, and come-alongs to position heavy components, often in confined or elevated spaces
• Testing: Performing hydrostatic pressure tests and non-destructive examinations to verify weld integrity and vessel soundness
• Emergency repairs: Responding to boiler failures at power plants and industrial facilities, sometimes on short notice with tight turnaround deadlines

Boilermakers often specialize in either new construction (building boilers and vessels from scratch) or maintenance and repair (keeping existing systems running). Some focus specifically on field erection – assembling large vessels on-site – while others work in fabrication shops building components that are transported to job sites.

A Day in the Life of a Boilermaker

Your alarm goes off at 4:30 AM. You are three weeks into a refinery turnaround in Texas, living in a hotel 200 miles from home. By 5:30, you are through the security gate and headed to the safety briefing.

Today’s job is replacing corroded tubes in a heat recovery steam generator. You climb scaffolding four stories up, squeeze into a narrow access opening, and spend the morning cutting out old tubes with a grinder and torch. The space is tight – barely enough room to swing your arms – and the temperature inside the boiler casing easily reaches 100 degrees even with ventilation fans running. You wear a full-face respirator because of residual ash and insulation dust.

After lunch in the break trailer, you switch to welding. The replacement tubes need to be fitted precisely and welded to the header. Each weld will be X-rayed by a quality inspector, so there is zero tolerance for porosity, undercut, or lack of fusion. You strike an arc with a 7018 rod, watching the puddle carefully as you make a root pass on a tube-to-header joint. One weld down, fifteen to go before the shift ends.

By 5:00 PM, you have been on your feet for ten hours, soaked in sweat, and your neck aches from welding in awkward positions. But the welds are clean, and the inspector signs off on the ones that have been tested so far. Tomorrow, you will finish the remaining tube welds and help the crew close up the access panels. The turnaround runs for another two weeks, and then you head home – until the next job call comes in.

Boilermaker Salary and Job Outlook

National Salary Overview

Source: U.S. Bureau of Labor Statistics, 2024 data.

Salary by Experience Level

• Apprentice (Years 1-4): $40,458 - $53,944. Apprentices start at roughly 50-60% of journeyman wages and increase every six months. Even first-year apprentices earn a livable wage.
• Journeyman (5-10 years): $67,430 - $80,916. Fully qualified boilermakers with welding certifications earn solid middle-class incomes, and overtime during turnarounds pushes annual earnings significantly higher.
• Foreman / Senior (10+ years): $80,916 - $101,145+. Lead boilermakers, foremen, and those with specialized certifications (ASME, nuclear) earn top-tier wages. With consistent overtime and per diem, total compensation can exceed $120,000.

Top-Paying States for Boilermakers

Job Outlook

With only 16,800 boilermakers employed nationally and 1,700 openings per year, this is a small but stable trade. Growth is projected at 3% through 2032. The primary demand drivers are maintenance and repair of existing boilers and pressure vessels at power plants, refineries, and chemical facilities. Aging infrastructure means steady work for decades – these systems need constant maintenance, and there is no way to automate the work of crawling inside a boiler to weld tubes.

How to Become a Boilermaker

Education Requirements

A high school diploma or GED is the minimum requirement. Strong backgrounds in math, welding, and shop classes give you an advantage when applying for apprenticeships.

The Apprenticeship Path (Recommended)

The standard path to becoming a boilermaker is a four-year registered apprenticeship through the International Brotherhood of Boilermakers (IBB). This is the most respected and comprehensive training available.

Alternative Training Paths

• Welding certificate program (6-12 months): Gives you a strong foundation in welding that helps you enter the trade, but does not replace the apprenticeship for full boilermaker qualification
• Pre-apprenticeship programs: Short programs (4-12 weeks) offered by some unions and community organizations that prepare you for the apprenticeship entrance exam
• Direct hire as a helper: Some contractors hire helpers without formal training, but advancement and pay are limited without completing an apprenticeship

Timeline

From high school graduation to journeyman boilermaker: 4-5 years. From journeyman to foreman: an additional 3-5 years of field experience.

Licensing and Certification

Welding Certifications (Essential)

Boilermakers must hold welding certifications to perform code work. These are not optional.

Additional Certifications

• OSHA 10/30-Hour Construction – Standard safety requirement
• NCCER Boilermaker Certification – Portable credential recognized industry-wide
• Confined Space Entry – Required for most boiler work
• Nuclear Quality Assurance (NQA-1) – Opens up high-paying nuclear plant work
• Rigging and Signal Person – Essential for crane-assisted erection work

State Licensing

Most states do not require a specific boilermaker license, but many require contractor licensing for companies performing boiler installation or repair. Individual welding certifications are the primary credential that matters in this trade.

Skills and Tools

Technical Skills

• Multi-process welding (SMAW, GMAW, FCAW, GTAW) on carbon steel, stainless, and alloy materials
• Blueprint reading and layout for pressure vessels and structural steel
• Rigging calculations and load chart interpretation
• Hydrostatic and pneumatic pressure testing
• Tube rolling and expanding for boiler tube replacement
• Cutting and fitting steel plate using plasma, oxy-fuel, and mechanical methods
• Non-destructive examination awareness (X-ray, ultrasonic, magnetic particle)
• Refractory installation and repair

Soft Skills

• Extreme attention to detail – welds on pressure vessels must be flawless
• Comfort working in confined spaces, at heights, and in extreme temperatures
• Physical strength and stamina for 10-12 hour shifts of heavy manual work
• Willingness to travel extensively for turnaround and outage work
• Ability to work cooperatively in large, multi-trade crews under time pressure
• Self-discipline to maintain welding quality under fatigue

Common Tools and Equipment

• Welding machines (stick, MIG, TIG, flux-core)
• Oxy-fuel and plasma cutting rigs
• Grinders (angle, die, and bench)
• Come-alongs, chain falls, and hydraulic jacks
• Tube expanders and tube rollers
• Levels, plumb bobs, squares, and measuring tapes
• Impact wrenches and torque wrenches
• Scaffolding and fall protection equipment
• Respirators and supplied-air breathing systems

Work Environment

Where Boilermakers Work

Boilermakers work in power plants (coal, gas, nuclear), petroleum refineries, chemical plants, shipyards, steel mills, and paper mills. Most work is performed at the client’s facility during scheduled maintenance shutdowns or new construction projects.

Schedule and Travel

Travel is a defining feature of the boilermaker trade. Turnarounds and outages at power plants and refineries can last two to eight weeks and require working far from home. During these shutdowns, 10-12 hour days, six or seven days a week, are standard. The overtime pay is substantial – and it is the reason many boilermakers earn well above the median. Between turnarounds, there can be gaps in employment. Many boilermakers work through their union hall, which dispatches them to the next available job.

Physical Demands

Boilermaking is among the most physically demanding trades. You work inside boilers where temperatures exceed 100 degrees, in confined spaces where you can barely turn around, and at heights requiring harnesses and tie-offs. The materials are heavy – steel plate, heavy pipe, and structural sections. Noise levels are high. Dust, fumes, and chemical exposure require constant use of respirators and protective equipment.

Pros and Cons

Pros:

• Among the highest-paying construction trades ($67,430 median, $101,145 at 90th percentile)
• Strong union representation with excellent benefits (health, pension, annuity)
• Strong job security – aging industrial infrastructure is expected to drive steady demand for maintenance work
• Portable skills recognized nationwide
• Massive overtime opportunities during turnarounds

Cons:

• Extensive travel away from home, sometimes for months at a time
• Extreme physical demands (heat, confined spaces, heavy lifting)
• Seasonal and cyclical work – gaps between jobs are common
• 4-year apprenticeship commitment required
• Higher-than-average exposure to hazardous environments
• Can be hard on relationships and family life due to travel

Career Advancement

Specialization Options

• Nuclear boilermaker – Highest pay, strictest quality requirements, requires NQA-1 certification
• Pressure vessel fabricator – Shop-based work with more regular hours
• Welding inspector (CWI) – Transition from hands-on work to quality oversight; median $68,000+
• Boiler inspector – State-employed or insurance company inspectors; requires commission from the National Board

Related Careers

• Welder – Median $47,540/year; broader but less specialized
• Ironworker – Median $60,400/year; structural steel focus
• Construction Manager – $80,000-$120,000+; project oversight
• HVAC Technician – Median $57,300/year; related mechanical systems

Browse all Skilled Trades & Technical Careers.

Professional Associations and Resources

• International Brotherhood of Boilermakers (IBB) – Primary union for boilermakers; runs apprenticeship programs, training centers, and dispatch halls
• National Board of Boiler and Pressure Vessel Inspectors – Sets standards for boiler and pressure vessel inspection and repair
• American Society of Mechanical Engineers (ASME) – Develops the Boiler and Pressure Vessel Code (BPVC) that governs the trade
• American Welding Society (AWS) – Welding certifications, education resources, and career development
• NCCER (National Center for Construction Education and Research) – Standardized training curricula and portable credentials

Frequently Asked Questions

How much do boilermakers make per hour?

The median hourly wage for boilermakers is approximately $32.42. Union journeymen in high-pay states (Washington, Illinois, New York) earn $38-$45+ per hour before overtime. During turnarounds, 60-70 hour weeks at time-and-a-half push weekly paychecks well above $2,000.

How long does it take to become a boilermaker?

The standard apprenticeship is four years. If you include the application process and waiting for an opening, plan on 4-5 years from start to journeyman status. Welding school graduates may receive credit for some apprenticeship hours.

Do boilermakers travel a lot?

Yes. Travel is one of the defining characteristics of the trade. Turnaround work takes boilermakers to refineries, power plants, and industrial facilities across the country, often for 2-8 weeks at a time. Per diem payments (typically $75-$150/day) offset travel costs.

Is boilermaking a dying trade?

No. While the workforce is small (16,800 nationally), the need to maintain and repair existing boilers, pressure vessels, and industrial infrastructure ensures steady demand. Many current boilermakers are approaching retirement age, creating openings for new workers. The trade has adapted to new energy technologies – boilermakers now work on heat recovery systems, biomass plants, and nuclear facilities.

What is the difference between a boilermaker and a welder?

All boilermakers are welders, but not all welders are boilermakers. Boilermakers are specialists who work specifically on boilers, pressure vessels, and tanks. Their welding must meet stricter quality codes (ASME, NBIC) and they also perform rigging, fitting, tube work, and heavy fabrication that goes beyond general welding.

Do I need to be in a union to work as a boilermaker?

No, but the overwhelming majority of boilermakers are union members through the International Brotherhood of Boilermakers. The union provides the apprenticeship, dispatches work, negotiates wages, and maintains health and pension benefits. Non-union boilermakers exist but typically earn less and have fewer benefits.

What physical requirements do boilermakers need to meet?

You must be able to lift 50-75 pounds regularly, work in confined spaces and at heights, tolerate extreme heat, and maintain focus while wearing respirators and other PPE. Good cardiovascular fitness, upper body strength, and flexibility are essential. Most apprenticeship programs require a physical exam.

Find boilermaker and welding training programs near you. Program availability, tuition, schedules, and requirements vary by school and state. Contact programs directly to confirm details.

Notice an update we should make?
We strive for accuracy. Contact us here if you see incorrect or outdated info on this page.