Pipefitter License Requirements

Install and maintain piping systems for industrial and commercial facilities. Compare requirements across all 50 states.

States Require License

$371

Average Initial Cost

States Require Exam

About Pipefitter Licensing

Pipefitters install, maintain, and repair piping systems that carry liquids, gases, and sometimes solids at high pressures and temperatures in industrial and commercial facilities. The work differs from plumbing in that pipefitting typically involves larger-diameter pipes, higher pressures, and more specialized materials and joining methods including welding, threading, flanging, and specialty fittings.

Pipefitters work in refineries, power plants, manufacturing facilities, pharmaceutical plants, and large commercial buildings. The systems they install may carry steam, compressed air, hydraulic fluid, process chemicals, and other substances. Precision is critical, as system failures can result in serious injury, environmental contamination, and costly production downtime.

Licensing Landscape

Pipefitter licensing varies by state and is sometimes regulated under plumbing or mechanical contractor licensing. Some states have a specific pipefitter or steamfitter license category. Industrial pipefitting often requires additional certifications for welding (per ASME codes) and specific system types. States with significant industrial infrastructure tend to have more specific pipefitter licensing requirements.

Common Requirements

Pipefitter or plumbing license (state-dependent)
Welding certifications for welded pipe joints
Apprenticeship or equivalent experience (4-5 years)
Knowledge of ASME piping codes
General liability insurance
OSHA safety training including confined space

What Does a Pipefitter Do?

Read isometric drawings and piping schematics

Cut, thread, and bend pipe to specifications

Weld pipe joints per ASME welding procedures

Install pipe supports, hangers, and expansion loops

Pressure test piping systems for leaks

Install valves, gauges, and control devices

Insulate piping systems per specifications

Maintain and repair existing piping systems

Career Outlook

Average Salary Range

$52,000 - $92,000

Projected Growth

2% (2022-2032)

Pipefitters are essential to industrial infrastructure and benefit from demand in energy, pharmaceutical, manufacturing, and commercial construction sectors. Infrastructure modernization and the expansion of natural gas processing create additional opportunities. The specialized skills and licensing requirements support strong wages, particularly for pipefitters with welding certifications who can work on high-pressure and high-temperature systems.

Frequently Asked Questions

What is the difference between a pipefitter and a plumber?

Plumbers typically work on water supply, drainage, and gas systems in buildings. Pipefitters work on industrial piping systems that may carry steam, compressed air, chemicals, and other substances at high pressures. Pipefitting generally involves larger pipes, higher pressures, and more welding. The licensing categories may overlap in some states.

Do pipefitters need to be welders?

Many pipefitting jobs require welding skills, particularly for industrial piping systems. Welding certifications per ASME codes are often required for high-pressure and process piping. However, some pipefitting work uses threaded, flanged, or mechanical connections that do not require welding.

Is pipefitting licensed differently from plumbing?

In some states, pipefitting and plumbing have separate license categories. In others, pipefitting falls under the plumbing license or a broader mechanical contractor license. Check your state requirements, as the distinction varies significantly.

Find Your State's Pipefitter Requirements

Select your state below to see the specific licensing requirements, fees, exams, and step-by-step application process for pipefitters.

Pipefitter License by State

Alabama