Seamless pipe weight calculation formula

What is seamless pipe?

Seamless steel pipes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in construction, such as steel scaffolds, are used to make ring parts with steel pipes, which can improve material utilization, simplify manufacturing processes, save materials and processing hours, such as rolling bearing rings, jack sets, etc., have been widely used to manufacture steel pipes.

Seamless pipe weight calculation method

There are two common methods for calculating the weight of seamless pipes: direct measurement and estimation. Direct measurement involves weighing a component using a scale or other instrument. While this method is accurate, it may not be practical in some cases, such as when the pipe is too large or too long to be weighed on a typical scale. In these cases, an estimate can be used to determine the weight of the pipe. Estimating involves measuring the pipe's diameter, length, and wall thickness, then using these measurements to calculate weight.

Different materials have different densities, which affect the overall weight of the component. For example, stainless steel is significantly heavier than aluminum, so a stainless steel pi of the same size is heavier than an aluminum tube of the same size. When calculating the weight of seamless pipe, it is important to consider the material composition and adjust the calculation accordingly.

Seamless pipe weight calculation formula

The weight of seamless steel pipe per meter W=0.02466*S(D-S). 

Symbol meaning: D=outer diameter, S=wall thickness.

For example: a seamless steel pipe with an outer diameter of 60mm and a wall thickness of 4mm, find the weight per m.

Solution: Weight per m=0.02466*4*(60-4)=5.52Kg.

The calculation formula of seamless steel pipe theoretical weight seamless steel pipe W=0.0246615(D-S)*SW.

Extended information:

1. The formula for calculating the weight of carbon steel pipes with square and rectangular (rectangular) cross-sections:

The unit of weight per meter: kg/m (kilogram/meter) & lb/ft (lb/ft).

Calculation formula: kg/m = (OC-4WT) * WT * 0.00785

Among them: OC is the outer circumference, WT is the wall thickness; square OC=4*a, rectangle OC=2a+2b a,b is the side length.

2. Weight calculation formula for circular section carbon steel pipe:

Calculation formula: kg/m = (OD-WT) * WT * 0.0246615.

Among them: OD is the outer diameter and WT is the wall thickness.

Seamless steel tube theory weighing scale

The actual weight of the seamless steel pipe is calculated according to the nominal size and density of the steel (called the specific gravity in the past), which is called the actual weight. This is directly related to the length dimension, cross-sectional area and size tolerance of the steel. Due to the allowable deviation of steel in the manufacturing process, there is a certain deviation between the actual weight calculated by the formula and the actual weight, so it is only used as a reference for budgeting.

Seamless steel pipe size and allowable deviation.

Deviation level	Standardized outer diameter allowable deviation
D1	±1.5%,least ±0.75 mm
D2	±1.0%,least ±0.50 mm
D3	±0.75%,least ±0.30 mm
D4	±0.50%,least ±0.10 mm

Safety precautions

Accurately calculating the weight of seamless pipe is critical to ensuring the safety of any project in which they are used. Incorrect calculations can cause problems, such as pipes that are too weak to support the expected load. In addition, the force that a seamless pipe can withstand is determined by its yield strength, which in turn is affected by its material composition. Knowing the weight of the pipe allows engineers to ensure that it is strong enough to support expected loads.

Read more: Seamless Steel Pipe Sizes