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.
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
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
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)
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 |  |
| TYPE 2 | Both ends threaded with one coupling and one plastic cap |  |
| TYPE 3 | No Threads |  |
| TYPE 4 | No threads with one press coupling |  |
| 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:
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.
Fully Loaded Container and Loose Packing
Different Sizes – Calorised Ceramic Coated Pipe
| 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 | – |
| 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
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.
Read More