MSL Seamless Pipe Weight Calculator

Is seamless pipe sold per metre or per kilogram?

MSL seamless pipe is listed and invoiced per metre, not per kilogram. The kg/mtr figure matters anyway, because it is what decides your freight cost, what the crane on site has to lift, and how a tender that asks for tonnage should be answered. This calculator converts between the two: pick the size and schedule, enter the running length, and it returns the weight the consignment will actually carry.

What does the schedule number mean on a seamless pipe?

The schedule sets the wall thickness for a given outside diameter. The outside diameter of a nominal size never changes — a 2 inch pipe is 60.30 mm OD in SCH.40 and in SCH.160 alike — but the wall gets thicker as the schedule number rises, so the bore shrinks and the weight goes up. That is why SCH.160 in the same size can weigh roughly double SCH.40, and why quoting a size without a schedule is not a specification.

What standard are these weights based on?

The dimensions follow the ASME B36.10M outside diameter and wall thickness series that MSL manufactures to, and the pipe itself is supplied to ASTM A106 Gr.B and ASTM A53 Gr.B. The kg/mtr figures in this calculator are the ones published on the current MSL price list held by Vijay Sales Corporation, not values computed from a formula, so they match what you will be invoiced against.

How does weight affect the price I pay?

Rates are quoted per metre, so weight does not change the pipe price directly — but it drives everything around it. Freight is charged on tonnage, so a heavy-schedule order costs more to move than a light one of the same length. Weight also sets the handling equipment and the number of lengths a vehicle can legally carry. Working out the tonnage before you order is usually the difference between an accurate landed cost and a surprise.

Are MSL seamless pipes IBR approved?

Yes. MSL seamless pipes are IBR approved, which is what a boiler or steam installation coming under the Indian Boiler Regulations will require, and the certification travels with the material. If your project needs IBR documentation, say so when you enquire so the right certificates are issued against the despatch rather than chased afterwards.

What weight tolerance should I expect on delivery?

The kg/mtr figures here are nominal, calculated on the specified wall thickness. Real pipe is manufactured within the tolerance the standard allows, so an actual consignment can weigh slightly more or less than the calculated figure, and mill lengths are random rather than exact. Use the calculated tonnage for planning freight and lifting; use the weighbridge or the mill test certificate for anything that has to be exact.