Expert Boiler Services Supporting Critical Industrial Operations
Turnkey repairs, maintenance, and installations for a variety of boilers including recovery, package, fossil-fired, and Heat Recovery Steam Generators (HRSG) — delivered safely and on schedule.
National delivers the industry’s most comprehensive boiler services. From full-scope outage planning to 24/7 emergency response, our skilled and dedicated teams ensure minimal downtime, quality execution, and unmatched safety performance.

What We Do
We specialize in complete industrial boiler lifecycle services - including planned maintenance and outage support, component replacement, capital installations and emergency response for unplanned events.
Our success lies in our highly skilled and dedicated workforce, strict adherence to quality and safety standards and our track record of completing projects on time and on schedule.

Service Features
Turnkey Outage Execution
Full-scope outage support led by expert project managers.
ASME and NBIC Accreditation
NBIC “R” stamp and ASME “S” and “U” stamp holder.
Quality
Consistently achieves industry leading 97%+ weld acceptance rate.
Capital Installation Projects
End-to-end installs of boiler systems including major components and interconnects.
Fabrication
Onsite and offsite pipe and component fabrication capabilities.
Component Replacement
Services include the replacement of tubes, panels, superheaters, and ancillary components.
Emergency Boiler Response
Rapid deployment nationwide
Boiler Types We Specialize In
National ensures your coal boiler operates at the highest levels of efficiency
Coal boilers are commonly used to heat water and create steam for energy production. Coal-fired boiler efficiency can often provide lower operating costs in comparison to other fossil fuels – almost 75% less than oil or natural gas. Coal, when properly handled and combusted, is one of the cleanest fossil fuels available today.
National offers expert field services, including repair, fabrication, and installations to help operate and maintain your coal boiler at the highest efficiency levels possible.
Capabilities and Systems Serviced
We understand that a quick response is critical when process and power applications are at stake. Our crew of safety-conscious and highly-trained employees - including code certified and skilled welders - is available to get your coal boiler back online with minimal down time. National also provides essential component upgrades and field services for coal boilers, including:
National services common gas boiler problems, ensuring quick and efficient heating for multiple applications
Industrial gas boilers are primarily used for heating water for the creation of process steam. Plants commonly use natural gas boilers to produce power for multiple applications.
A distinct advantage of the industrial gas boilers is the availability of natural gas resources and its high energy-to-heat ratio. National Boiler Service specializes in servicing common industrial gas boiler problems, as well as installing replacement gas boilers to maintain high efficiencies.
Capabilities and Systems Serviced
National is prepared to meet your gas boiler installation, maintenance, or repair needs. Call us when erecting a new boiler or repairing/retrofitting an existing industrial gas-fired boiler for expert consultation. We also offer component upgrades and field services, including:
National specializes in servicing the heart of the pulp and paper industry
Recovery boilers were first invented in the early 1930s and have since been a key player in the Kraft process of pulping.
While replacement of recovery boilers does not usually happen until the end of their economic lifetime (a lifespan that can average up to 40 years), upgrading your recovery boiler system to meet modern standards provides new opportunities to optimize energy savings and reduce emissions.
Capabilities and Systems Serviced
National has Pulp & Paper teams devoted to servicing waste heat recovery boilers and related components. Our field services range from assistance in scheduling your next planned shutdown and boiler condition assessments to immediate response when emergency situations occur.
We provide installation of the latest technology and modularized components to increase the overall efficiency of your recovery boiler and reduce maintenance. We also offer essential component upgrades and field services for recovery boilers, including:
Maintaining maximum efficiency
Bark boilers are primarily used in pulp and paper mills to produce process steam for paper production. These boilers are especially efficient in the production of pulp and paper, as bark is a waste by-product of previous processes involved in paper making. Steam is generated when the bark waste is burned and converted to process steam that turns a turbine to produce electrical power.
National can help the Pulp & Paper industry optimize the production of energy from wood waste and reduce overall energy costs. National can also help bark boilers maintain maximum efficiency through preventive maintenance and periodic upgrades.
Capabilities and Systems Serviced
National understands that most of the problems associated with bark boilers are related to inadequate mixing between the combustible gases and air. National specializes in preventative maintenance and boiler optimization to safeguard against this and other common bark boiler problems. In addition to bark boiler installations and emergency repairs, National also provides essential component upgrades and field services for bark boilers, including:
High efficiency package boiler systems
National installs high performance package boiler systems that meet your unique application requirements.
High efficiency package boiler types are available in watertube, firetube, or hybrid boilers, and can range in horsepower and pounds of steam per hour. Each package boiler includes all controls, piping, and pumps necessary for installation and commissioning.
Capabilities and Systems Serviced
National provides on-site installation and emergency repair of all complete boiler systems - even those we did not build. National can also upgrade, modify, or reconfigure package boilers for multiple heating and processing needs. We also provide component upgrades and field services for alternative fuel boilers and solid fuel fired boilers, including:
Safe, effective, and efficient biomass boiler system service
With more than 20 years servicing biomass boiler systems for the Pulp & Paper industry, National understands the harsh conditions associated with biomass environments. We have extensive experience helping companies convert to renewable fuels, as well as the experience to maintain, repair, or upgrade your existing biomass boiler system.
From regular tube-cleaning and ash removal to full upgrades, emergency repairs and more, National's biomass boiler services can improve system efficiencies, strengthen your profitability, and minimize dangerous emissions.
Capabilities and Systems Serviced
Whether it’s an emergency repair or scheduled outage, National has distinctive insight in how to quickly and effectively service biomass boilers to improve efficiency and increase the life of your biomass boiler. National also provides essential component upgrades and field services for biomass boilers, including:
Components Serviced
Economizers
Superheaters
Burner System Optimization
Furnace Panels
Generating Banks
Air Heater Upgrades
Auxiliary Feed Equipment
Key Benefits
Downtime Reduction
Rapid response to unplanned events minimizes downtime, reduces costly delays
Schedule Certainty
Comprehensive preplanning and skilled craftsmen ensure timely project completion
Code Compliance
All services in compliance with applicable ASME/NBIC standards
Scalability
Capability to rapidly expand our qualified workforce to fulfill project staffing needs nationwide
Single Partner Solution
Simplify vendor coordination by choosing National as your comprehensive, end-to-end service provider

Pulp & Paper

Supporting pulp and paper facilities with reliable boiler solutions, timely repairs, and emergency services to maintain consistent production and energy efficiency.
Power Generation

Keeping power plants running at peak performance with expert boiler services, outage support, and rapid emergency response to maximize uptime and efficiency.
Petrochemical

Supporting safe, compliant, and efficient operations for Petrochemical facilities through specialized boiler expertise, precision repairs, and responsive outage support
Industrial Manufacturing

Ensuring manufacturing plants operate without interruption with comprehensive boiler care, component replacements, and fast-deploy emergency solutions.
Why Choose National?
Let’s keep your operations running at peak performance.
30+
Years of expertise
24/7
emergency response
100+
Outages executed every year
5,000+
Craft database resources
Schedule Certainty
Accredited
QA/QC program
Built on Safety, Focused on Excellence
NBIC “R” stamp and ASME “S” and “U” stamp holder
What boiler types does NATIONAL specialize in?
Coal Boilers. Gas Boilers, Recovery Boilers, Bark Boilers, Package Boilers, Biomass Boilers.
How fast can your team mobilize for emergency repair?
Our team can deploy nationwide within hours, 24/7, ensuring minimal downtime and rapid resolution of boiler issues.
What code certifications does National hold?
NBIC “R” stamp and ASME “S” and “U” stamp holder.
Do you support planned shutdowns?
Yes, we specialize in full-scope outage planning and execution.
Get Started
Let’s keep your operations running at peak performance.
