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Tubeweld (India) Limited is one of the leading manufacturer and exporters of seamless carbon/alloy steel pipes and tubes, ERW boiler tubes, Air Pre-heater tubes including Carbon steel tubes, Steam pipes and fittings, Boiler components like Superheater coils, Economiser coils, Steam generating bent to shape tubes, panels, heaters, pipework for steam, feed waterline etc. We are a group of forty companies, having well diversified business. Our core competency lies in the manufacturing of boiler components and spares for very large fossil fuel fired steam boilers in thermal power plants, sugar & fertilizer industries, refineries, petrochemical, steel industries, smelter waste heat boiler, fluidised bed boilers etc..

Seamless Tubes

The mandrel is placed in the space. The soft centre of the billet makes it possible for the rolls to draw the billet over the mandrel, producing a hollow shell. When the billet has entirely passed over the mandrel, it is in the form of a thick walled seamless tube. The heavy walled tube is then passed to a rolling mill which reduces the tube to piping of proper outside diamter and wall thickness. A heated billet is brought into contact with tapered revolving rolls in such a way that the billed is pulled into the space allowed between the rolls. Depending upon the process condition (temperature), seamless tube/pipes is termed as Hot Finish Seamless or cold drawn seamless as the term implies.

Apart from above tubes and pipes can be formed by other processes, like forged, tunned, bored, etc depending upon the requirement.

Outside Diameter/ Thickness	in.	1/8	5/32	3/16	7/32	1/4	9/32
Outside Diameter/ Thickness	in.	0.125	0.156	0.188	0.219	0.250	0.281
in.	mm	3.175	3.969	4.763	5.556	6.350	7.144
1^7/16	36.51	0.796	0.970	1.140	1.295	1.440	1.557
1 ^1/2	38.10	0.834	1.017	1.196	1.361	1.516	1.661
1 ^5/8	41.28	0.909	1.111	1.310	1.493	1.667	1.838
1 ^11/16	42.86	0.948	1.159	1.368	1.560	1.744	1.918
1 ^3/4	44.45	0.985	1.206	1.424	1.626	1.819	2.002
1^7/8	47.63	1.061	1.301	1.538	1.759	1.970	2.172
1^29/32	48.42	1.080	1.324	1.566	1.792	2.008	2.215

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