Kandi Engineering Pvt Ltd

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Calorised & Ceramic Coated Pipes

KANDI introduced CALORISED & CERAMIC COATED PIPES (CCCP) for Indian and Global Steel Making Shops to increase the lance life beyond conventional black steel pipes and coated pipes.


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    Calorised lance pipe is made up of 5 layers. At the core is a high quality mild steel lance pipe. By calorisation, a thickness of 100-150 microns is imparted on outer surface, and further coating with refractory materials in 200-300 microns thickness on both inner and outer surfaces, the diffusion is an inter metallic bond, which doesn’t get damaged either by mechanical working like bending or straightening or by high temperatures. In the case of metal diffused pipes, the metal existing at the surface of the diffused zone is oxidized to the respective oxide, which prevents the further progress of oxidation and also melting. For instance, by calorisation, aluminium is oxidized alumina, which has a very high melting point of 2050 oC compared to the melting point of aluminium, which is mere 658 oC.

    Calorised and Ceramic Coated Pipe

    Calorised and Ceramic Coated Pipe

    Why Calorised  Lance Pipes were developed for oxygen steel making?

    In the process of steel manufacturing by open hearth or electric furnace, the consumption rate of lance pipes for oxygen injection slows rather high ratio owing to high temperature severe oxidation. In general, steel pipes are used as lance pipes for oxygen injection. If MS pipes are treated by Calorisation process, consumption rate of lance pipes will decrease 5-8 times. Research conducted over many years revealed that the most effectual method is to diffuse aluminum into the pipe’s surface, so as to promote where proof properties on steel pipe. Calorising is carried outside of the steel pipe to promote wear and fire proof properties of the pipe.

    Cross Section of Electric Arc Furnace showing Lance position

    Cross Section of Electric Arc Furnace showing Lance position

    When Calorised pipe is exposed to high heat, the refractory material and the Calorised layer form an Aluminium Oxide Film which increases the melting temperature to 2050 oC (3750 oF). Bare lance pipe melts at temperatures of 1300 to 1500 oC (2400 to 2800 oF)

    Calorisation On Ceramic Coated Pipe

    MS pipes are calorised on outer surface, and are thereafter given Ceramic Coating on both inner and outer surface after the calorizing treatment. Ceramic coating gives an extra ordinary higher life and resistance to corrosion at high temperature than ordinary MS pipes and expensive stainless and alloy steel pipes normally used in oxygen lancing in electric arc furnaces and chemical factories and refineries. The average life of calorised with ceramic coated pipes is 5-8 times more than that of ordinary MS Pipes and Stainless Steel Pipes.

  • TYPE 1 Both ends threaded with one coupling and one plastic cap type1
    TYPE 2 Both ends threaded with one coupling and one plastic cap type2
    TYPE 3 No Threads type3
    TYPE 4 No threads with one press coupling type4
    N.B & SERIES OD WALL THICKNESS STD LENGTH* COATING THICKNESS COVERED
    mm mm mm mm MICRONS
    08 13.4 1.7 – 1.8 5500 250 avg.
    10 16.9 1.8 – 1.9 5500 250 avg.
    15 21.2 2.0 – 2.1 5500 300 avg.
    20 26.9 2.3 – 2.4 5500 350 avg.
    25 33.8 2.5 – 2.6 5500 400 avg.
    32 42.5 2.5 – 2.7 5500 400-450 avg.
    40 48.4 2.8 – 3.0 5500 400-450 avg.

  • To enumerate the advantages of these pipes in oxygen steel making process are:

    • The exothermic reaction and agitation promote decarbonisation and heat rise in the furnace, while foaming slag can be eliminated.
    • Fusion of sub material can be accelerated.
    • Quality of steel will be improved.
    • As the process raises the temperature.
    • Selection of raw materials to be charged becomes easy.
    • The process raises the production capacity of an electric furnace.
    • Hydrogen,Nitrogen and non-metallic inclusions can be eliminated through oxidation.
    • It makes it possible to recover chrome with the use of high chrome steel scrap.

    To summarize, Calorised & Ceramic Coated Pipe (CCCP) is carbon steel pipe with calorisation on outer surface of pipe, and thereafter  multiple, thin layers of ceramic coating both exteriorly and interiorly. The outer surface of ceramic coating on pipe is resistant to slag attack and extends the life of the pipe when it is immersed into molten metal or in high temperature atmospheres. The CCCP applications include powder injections, tap-hole cleaning and opening nozzles is ladles, tundish and launders.

    • Cutting scrap, raising bath temperatures and decarburizing
    • Opening nozzles in tundish and ladles
    • Injecting carbon and other powders into the electric furnace and ladle
    • Opening the iron notch of a blast furnace
    • Injecting argon into ladles
    • Injecting argon and oxygen into the A.O.D. furnace
    • Injecting flux for degassing in aluminum melting furnaces

  • Fully Loaded Container and Loose Packing

    Fully Loaded Container and Loose Packing

    Different Sizes - Calorised Ceramic Coated Pipe

    Different Sizes – Calorised Ceramic Coated Pipe

    Standard Sizes

    Nominal Bore Size(mm) Packing(per bundle) Length (mm)
    15 (1/2″) 100 Pcs
    20 (3/4″) 100 Pcs 5500 mm
    25 (1″) 100 Pcs OR
    32 (1 1/4″) 50 Pcs 2750 mm
    40 (1 1/2″) 50 Pcs

  • Comparison chart between MS pipe & Calorised pipe:-

    Oxygen Charge Pressure (Kg/cm2) Oxygen flow rate (m3/min) Charge Time (min.) Length of consumption (mm) Consumption rate (mm/min) Type of Pipe Rate of MS Pipe to Calorised Lance
    6.5-7 6.5-5 3 1950 650 MS 1
    6.5-7 6.5-5 15 1420 94 CCCP 6.91
    6 6 3 2430 809 MS 1
    6 6 10 1150 115 CCCP 7.03
    5.5-6 5.5 3 1860 620 MS 1
    5.5-6 5.5 10 840 84 CCCP 7.38

    MS : MILD STEEL

    CCCP : CALORISED & CERAMIC COATED PIPE

    Characteristics of KANDI Lance Pipes

    • EXCELLENT REFRACTORINESS
    • SPEEDY DE-CARBURISATION for optimal metal oxygen interaction
    • GREATER EFFECIENCY of reaction
    • COST REDUCTION in Steel making

About Kandi Engineering Pvt Ltd

Kandi Engineering was incorporated in 1982, and started initial trading activities at Manor (Maharashtra), an Industrial Area just 85 kms from Mumbai, INDIA. Cost saving and good quality being the motto of the management, the production started in 1995 for manufacture of industrial products related to Steel & Metallurgical Industry.

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