Boilermaker Apprenticeship: Travel, Pay and How to Get In

A boilermaker apprenticeship trains you to build, repair and tear apart the heavy pressure equipment that power plants, refineries and factories depend on: boilers, tanks, vessels, stacks and pollution controls. It is a four-year union program built on welding and rigging, and it comes with a lifestyle question most trades do not ask as directly. Are you willing to follow the work?

This guide covers what boilermakers do, what BLS says the work pays, how the outage cycle shapes your year, and how to get into the Boilermakers National Apprenticeship Program.

What Boilermakers Do on the Job

Boilermakers work on big, thick-walled steel equipment that holds heat, pressure or both. According to the BLS Occupational Outlook Handbook, typical tasks include:

• Reading blueprints to place boiler parts at the right positions and dimensions.
• Laying out prefabricated pieces and assembling boiler tanks, sometimes with automatic or robotic welders.
• Aligning and joining heavy plate by welding, bolting or riveting, and signaling crane operators to lift it.
• Testing and inspecting systems for leaks and defects.
• Cleaning vats and repairing or replacing valves, pipes and joints with torches, welders and hand tools.
• Helping build and repair pollution-abatement equipment, furnaces, water treatment plants, tanks and smokestacks.

Much of the work happens inside the equipment itself: dark, cramped, hot, noisy and poorly ventilated spaces where respirators are common. It also happens at serious height on stacks and structures, outdoors in every season. BLS lists two qualities that sound obvious but screen people out fast: not being afraid of confined spaces, and not being afraid of heights. If you have ever felt your chest tighten crawling under a house, think hard about spending a shift inside a boiler drum.

Boilermaker Pay: What BLS Reports

Two cautions on those numbers. First, they are national medians covering union and nonunion workers, shop and field. Second, annual figures hide how boilermaker income actually arrives. A field hand can earn a large share of the year's pay during a few heavy-overtime shutdowns and then sit idle. That is why our piece on what published wage data misses matters more in this trade than most: your hourly scale plus hours worked tells you more than any median.

Notice the industry spread, too. The field-construction categories, especially utility work, pay noticeably more than shop fabrication. Many people start in a fab shop because it is steady, then move to field work for the higher rate and accept the less predictable schedule.

Travel and the Outage Cycle

The travel in the title is not a side note; for field boilermakers it is the job. BLS notes that boilermakers may travel to worksites and stay away from home for long stretches, that overtime can run long during equipment shutdowns, and that because field work is contract-based, stretches without work can follow when a contract ends.

Here is how that tends to play out. Power plants and refineries schedule outages, planned shutdowns when equipment comes offline for repair and inspection. Owners want them finished fast because every idle day costs money, so crews work long, consecutive shifts. When the outage ends, the crew is released. Then you look for the next one, which may be in your local's territory or several states away.

For some people that rhythm is the appeal: big checks, then real time off. For others it wrecks family plans and budgets. Our guide to the traveler system explains how union members work outside their home local when work is slow at home.

Questions to ask yourself before you apply:

• Can I be away for weeks at a time, and does my household agree?
• Can I budget for several months between jobs without panicking?
• Do I have reliable transportation to reach distant sites?
• Can I work long consecutive shifts without cutting safety corners?

How to Get Into a Boilermaker Apprenticeship

The International Brotherhood of Boilermakers describes its apprenticeship as four years of earn-while-you-learn training. In the United States it runs through the Boilermakers National Apprenticeship Program (BNAP); Canada has its own program. The union's skill list gives you a fair picture of the curriculum: welding, blueprint reading, rigging, layout and fabrication, tube rolling, cutting, knot tying, hand signals, and reeving and equipment use.

The general entry path:

1. Find your local. Locals handle recruitment and referrals. The international's recruiting and how-to-join pages point you toward the right one.
2. Meet the basics. BLS says a high school diploma or equivalent is generally required. Your local will list its own age, testing and document rules, so get them from the source.
3. Apply when your local is accepting. Timing and process vary by area, and some areas recruit more aggressively when big projects or outages are coming.
4. Bring welding if you can. BLS says welding experience improves your chances of acceptance, and applicants with welding or related experience, including military, may get priority or a shorter apprenticeship.

Finish the program and you are a journey-level boilermaker. BLS also notes that some states require a license, typically involving work experience and an exam, and that some employers prefer additional certification.

Shop Boilermaker vs. Field Boilermaker

BLS data hints at a split that shapes your whole career: about one in ten boilermakers works in fabricated metal product manufacturing, while most of the rest work for construction contractors in the field. The two lives look very different.

Neither is the better choice in the abstract. A shop job can be the right call while you have young kids or a mortgage that cannot handle a three-month gap. Field work pays more per hour and builds the rigging and repair experience that leads to foreman roles. Some boilermakers move between the two as their lives change.

Skills to Build Before You Apply

BLS names mechanical skill, physical strength and stamina as core qualities, along with comfort in confined spaces and at height. You can work on all of them before an application opens:

• Welding. A community college or trade school welding course is the single most useful step, since BLS says welding experience improves acceptance odds.
• Blueprint reading. Boilermakers place parts by dimension from drawings every day.
• Rigging basics and hand signals. Both appear in the union's skill list and come up constantly when plate is moving overhead.
• Fitness for climbing and crawling. Stacks, scaffolds and boiler internals are not forgiving of poor conditioning.

Boilermaker vs. Ironworker vs. Pipefitter

Applicants often confuse these three because all of them weld and rig. The difference is what you build:

If the idea of climbing inside the equipment and working shutdown schedules appeals to you, boilermaking is the fit. If you would rather build the skeleton of a building, look at ironwork. If you like systems and piping layout, look at the UA. Our union quick reference, linked below, sorts out who represents what.

Job Outlook: Small Trade, Replacement Openings

BLS counted about 10,200 boilermaker jobs in 2025 and projects a 2 percent decline through 2035, about 200 fewer jobs. Even so, it expects roughly 700 openings a year, all from replacing workers who retire or leave. Translation: this is a small, tight trade, and openings come mainly when experienced hands age out. Existing plants still need maintenance and outages whether or not new ones get built, but do not expect a hiring boom, and be ready to travel to wherever the work is.

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