A calorized lance pipe is a heat-resistant oxygen lance pipe used in steelmaking and other high-temperature work where bare mild steel pipe is consumed too quickly. At Daiwa Lance, we call it Daiwa CA Lance for short.
As a buyer - who is still considering to purchase this product for your foundry, probably you might keep this question in mind: can it stay in service longer around the furnace, resist severe oxidation, and reduce replacement frequency in repeated oxygen-related work?
In this blog, you’ll learn what a calorized lance pipe is, how the protective layers work, and the key factors that affect its real-life performance in foundry and steelmaking operations.
At Daiwa Lance, we manufacture Daiwa CA Lance from a mild steel base, then protect it with a heat-resistant calorized layer on the interior and exterior surfaces and a refractory ceramic coating on the interior and exterior surfaces as well. Daiwa CA Lance can last 3 to 10 times longer than mild steel lances, although actual consumption still varies with operating conditions.
In practice, the product is designed for longer life and lower consumption, while real performance still depends on your process.
More specifically, a calorized lance pipe is an oxygen lance pipe designed for harsh metallurgical service. Its role is not to burn itself like a thermic lance. Instead, it is used to deliver oxygen, carbon, lime powder, inert gas, or other process media while resisting heat, oxidation, and aggressive furnace-side exposure better than bare mild steel pipe.
Daiwa CA Lance becomes relevant when your current lance pipe melts too fast, oxidizes too easily, or needs to be replaced too often in repeated injection work. If that sounds familiar, you are usually looking for a more stable and heat-resistant pipe rather than a self-consuming cutting tool.
The structure is the starting point. Daiwa CA Lance is a mild steel pipe that goes through a calorizing process so aluminum diffuses into the steel surface and forms an aluminum-iron alloy, commonly called the calorized layer.
In Daiwa CA Lance, this heat-resistant calorized layer is formed on both the interior and exterior surfaces of the pipe. A refractory ceramic coating is then applied over those surfaces to give the pipe another line of protection in severe service.
This layered structure matters because the pipe is attacked from both directions during operation. Inside the pipe, oxygen or other process media can accelerate wear. Outside the pipe, furnace heat and aggressive atmosphere can shorten service life. That is why Daiwa CA Lance should be treated as an engineered working tool, not as a standard pipe with a simple surface finish.
The heat-resistant calorized layer is the core of the product’s heat resistance. During calorizing, aluminum diffuses into the steel surface and forms a heat-resistant aluminum-iron alloy.
When the pipe is exposed to high temperature, that surface forms an aluminum oxide film, or alumina film, which helps protect the mild steel base from severe oxidation.
For you as a buyer, the main point is practical. The heat-resistant calorized layer helps Daiwa CA Lance stay in service longer in furnace-side conditions where bare mild steel would oxidize and fail more quickly.
The refractory ceramic coating is the second major protection element. It gives the pipe another barrier against direct heat attack and aggressive furnace-side conditions. When you compare Daiwa CA Lance with bare mild steel pipe, this is one of the clearest differences: longer life does not come from wall thickness alone. It comes from the combination of a heat-resistant calorized layer and refractory ceramic coating working together.
Daiwa CA Lance works as a delivery pipe for oxygen and other injected materials in high-temperature operations.
In steelmaking service, oxygen is blown through the pipe for melting, refining, or process adjustment. Depending on the application, the same lance concept may also be used for carbon, lime powder, inert gas, or other additives. The purpose is stable process delivery with lower lance consumption than bare mild steel pipe under comparable conditions.
So if you are asking how Daiwa CA Lance works, the answer is straightforward: the pipe survives repeated furnace-side injection work because its mild steel base is protected by the heat-resistant calorized layer and refractory ceramic coating on both interior and exterior surfaces.
Daiwa CA Lance is used for several furnace-side duties. The core steelmaking applications are oxygen blowing, carbon injection, lime powder injection, and injection of other additives for adjusting grades of carbon steel or special steel in electric arc furnaces and induction furnaces. It can also be used by manipulator lancing or manual operation depending on the working setup.
Daiwa CA Lance is also used for blowing oxygen to cut steel scrap or refine molten steel, removing slag inside an oxygen converter, and other work that requires strong resistance against heat, oxidation, sulfuration, and vanadium attack.
Another important use is thermocouple protection in molten-metal environments, including aluminum smelters and certain aluminum, copper, and zinc melting furnaces.
The first reason is service life.
Daiwa CA Lance lasts 3 to 10 times longer than mild steel lances.
In high-heat comparison testing, after exposure to 1,270 C for 50 hours, the mild steel pipe is damaged while Daiwa CA Lance remains unharmed. At high temperature, the surface also forms a heat-resistant alumina film, which is one reason longer service life becomes possible.
The second reason is minimum consumption. The combined action of the heat-resistant calorized layer and refractory ceramic coating gives Daiwa CA Lance stronger heat resistance and anti-oxidation, with the practical goal of reducing lance consumption and cutting cost.
The third reason is process stability. If you need to replace bare mild steel pipe too often, the real cost is not only the purchase price of the pipe. It is also the handling time, interruption risk, and less predictable operation around the furnace.
Daiwa CA Lance is not a one-size-fits-all product. Standard outside diameters range from 10.5 mm up to 48.2 mm, with wall thicknesses typically around 2.0 to 2.8 mm depending on size. Standard lengths are 2,750 mm for the smallest size and 5,500 mm for most larger sizes. Common configurations include threaded types, non-threaded types, and a press-coupling type.
These details matter because a quotation should not stop at the name “Daiwa CA Lance.” You should confirm the application, outside diameter, thickness, standard length, end type, and connection style that you require. It is also reasonable to request the catalogue, specification sheet, or mill test certificate when you need technical review before purchase.
What is the actual role of the pipe that you require: oxygen blowing, carbon injection, lime powder injection, inert gas blowing, slag removal, or thermocouple protection?
Which furnace or process is involved: EAF, IF, oxygen converter, ladle furnace, blast furnace, or a smelter application?
What operating problem are you trying to solve: short service life, oxidation, sulfuration, excessive consumption, or unstable replacement frequency?
Which outside diameter, thickness, standard length, and end configuration fit the equipment already in use?
What documents do you need for evaluation: catalogue, specification sheet, mill test certificate, or company-level quality documents?
These questions help us recommend the right Daiwa CA Lance configuration instead of treating all lance pipes as interchangeable.
What is a calorized lance pipe?
A calorized lance pipe is a heat-resistant oxygen lance pipe made from mild steel with a heat-resistant calorized layer and refractory ceramic coating on the interior and exterior surfaces for harsh furnace service.
What is Daiwa CA Lance used for?
Daiwa CA Lance is used for oxygen blowing, carbon and lime powder injection, other additive injection, slag-removal-related oxygen service, inert gas blowing in some furnace applications, and thermocouple protection in certain molten-metal environments.
Why does Daiwa CA Lance last longer than mild steel lance pipe?
Because the heat-resistant calorized layer and refractory ceramic coating improve heat resistance and anti-oxidation, and the surface forms a protective alumina film at high temperature. Daiwa CA Lance can last 3 to 10 times longer than mild steel lances, although actual consumption still depends on operating conditions.
Does a calorized lance pipe always perform the same way?
No. Service life varies with furnace condition, oxygen setup, process severity, operator method, and the exact configuration being used.
What should you prepare before requesting a quotation?
At minimum, your enquiry should include the application, furnace type, current problem, required size and length, connection requirement, and any document requirements for technical review.
Daiwa CA Lance product page: https://www.daiwalance.com.vn/en/products/daiwa-ca-lance
Understand All About Daiwa Calorized Lance Pipes in 5 Minutes: https://www.daiwalance.com.vn/blog/understand-all-about-calorized-lance-pipes-in-5-minutes
Daiwa Calorized Lance Pipe - Calorizing Process: https://www.daiwalance.com.vn/blog/daiwa-calorized-lance-pipe-calorizing-process-final
Oxygen Lance Pipe glossary page: https://www.daiwalance.com.vn/glossary/oxygen-lance-pipe
Catalogue page: https://www.daiwalance.com.vn/en/resource/daiwa-lance-catalogue
Contact page: https://www.daiwalance.com.vn/en/contact
Established since 1997, Daiwa Lance has positioned ourselves as a pioneer in thermic cutting and oxygen lancing technology. Based in Ho Chi Minh City, Vietnam, we have been providing quality customer service and products with advanced Japanese technology.
We maintain the highest quality standards with ISO 9001:2015, ISO 14001:2015, and JIS G standards certifications. We have also expanded our reach globally, exporting to over 55 countries worldwide.
Visit us through our contact channels today: Email, WhatsApp, Contact Us form, or connect with us on Youtube, LinkedIn and Facebook.
