IST Boiler covers your boiler needs from A to Z

Company profile

IST boiler was established in 1975 as a certified ASME manufacturing facility and was acquired by Canerector inc. in June 2018. With over 150 years of in-house industry experience, IST Boiler sets the industry standard for quality, service and supply.

We specialize in boiler parts for emergency repairs and planned outage maintenance projects. Whether you are looking for headers, screen tubes, superheaters or other boiler parts, IST Boiler is your designated, one-stop shop.

Our company is defined by:


IST Boiler has been in continuous operation since 1975, supplying boiler pressure parts for all areas of the boiler, and in-plant operations designed to minimize the number of field operations during installations. Our extensive inventory of tubing and attachments for major boiler manufacturers is available for immediate shipment, and our state-of-the-art manufacturing technology provides maximum consistency and certified quality. IST Boiler is proudly authorized to use the American Society of Mechanical Engineers (ASME) certification PP, S and U designators, as well as the National Board of Boiler & Pressure Vessel Inspectors Certificate of Authorization to Register, all in accordance with the applicable Code.


Headers are a vital component of all boiler types. Boiler tubes that are not connected to drums are connected to headers. They collect water and steam to distribute to other parts of the boiler. Headers are typically made of carbon or alloy steel, generally of the same grade as the boiler tubes connected to them.


Waterwall Ports and Openings

IST Boiler manufactures replacement waterwall opening assemblies for industrial boilers. Recently completed projects include a partial lower furnace wall replacement, which consisted of burner and air port openings. We also offer a range of inspection and camera ports, as well as access doors of all configurations and custom tube bending.


Screen Tubes

The primary purpose of the furnace screen is to protect the front of the superheater from overheating. Water circulates rapidly through the screen tubes, shielding the superheater from direct furnace radiation and blocking boiler fly ash to prevent carryover into the superheaters platens and generating bank tubes. Furnace screens also provide some gas cooling, which is otherwise provided by the waterwalls.



Superheaters typically consist of several banks of tubes with various arrangements. Steam from the drum passes to the superheater platens, where it is heated above its saturation temperature until it reaches the maximum required operating temperature. The superheated steam flows to the high-pressure turbine. Because superheater tubes operate at higher temperatures than other boiler tubes, they are often made of high alloy steels.


Generating Banks/Tubes

The generating bank is a natural circulating steam generator, consisting of a mix of water and steam. Fuel is burned inside the furnace, creating hot gas which heats the water/steam in the front tubes of the bank. These generating tubes then carry the steam upwards, while water flows down in the back tubes of the bank. These types are typically bent to a large radius, requiring expertise to ensure the tubes not only last a long time, but can be delivered with, or without, swaged ends. Large boilers rely on the water-filled tubes that make up the furnace waterwalls to generate steam. The heated water rises into the drum, where the saturated steam is drawn off the top of the drum. In most large, industrial services, the steam re-enters the furnace through a superheater. Superheated steam has been heated to a high temperature in order to ensure a majority of the moisture content is removed. It then becomes a dry gas that can be used to drive the turbine.


Furnace Waterwall Panels

Waterwalls are the water-filled tubes that form furnace walls. The heat from the furnace is transferred to the water tubes. The hotter and less dense water flows upwards. Waterwalls are fed water from downcomers, which are pipes connected to the drum. IST Boiler manufactures high-quality waterwall panels, as well as floor and roof tube panels of various configurations using carbon steel or composite materials.

Large Tube Inventory & Parts

IST Boiler meets customers' boiler and tube replacement needs, whether they have been scheduled or result from an emergency, with the largest in-shop inventory of ASME tubing in Canada and the Western United States. We’ve got the edge on our competition with 250,000 of tubing inventory including instock tight bends and boiler parts. We provide everything from superheater elements to single bends.


Whether your boiler is down and in need of emergency repair, or it requires a scheduled refit, call us at IST Boiler Inc. We’ll be there to answer any questions you may have, talk you through the process and work with you to get your boiler up and running as promised, on time, and with quality parts you can be confident will serve you well

We specialize in boiler parts for emergency repairs and planned outage maintenance projects. While we take care of the 'guts' of your boiler needs, our trusted service partners work closely with you to understand the details of your project and complete your installation. If you are interested in learning more about service partners in your area, contact us today for more information.