CS Pipe Weight Calculator in Kg – Calculate Steel Pipe Mass
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Calculation Results
— kg
Formula Used: Weight (kg) = ( (OD² – ID²) / 4 ) * π * Length * Density / 1,000,000,000
(Simplified: (OD² – ID²) * Length * Density / (4 * 1e9) )
Where OD is Outside Diameter, ID is Inner Diameter, Length is in meters, and Density is in kg/m³.
Results copied!
Weight vs. Length Analysis
Weight of pipe for varying lengths (fixed OD and WT).
Weight Data Table
| Pipe Length (m) |
Calculated Weight (kg) |
Inner Diameter (mm) |
Detailed breakdown of weight and dimensions for specific lengths.
What is CS Pipe Weight Calculation?
The calculation of CS pipe weight in kg is a fundamental process in the engineering and construction industries. CS stands for Carbon Steel, one of the most widely used materials for piping systems due to its strength, durability, and cost-effectiveness. Determining the precise weight of a carbon steel pipe is crucial for several reasons, including accurate material procurement, safe handling and transportation, structural load calculations, and overall project cost estimation. This cs pipe weight calculator in kg provides a quick and reliable method to obtain these figures.
Essentially, calculating the cs pipe weight in kg involves understanding the pipe's dimensions (outside diameter, wall thickness, and length) and the material's density. These factors combine to determine the volume of steel used, which, when multiplied by the density, yields the total mass in kilograms. This process is vital for engineers, project managers, procurement specialists, and site supervisors to ensure that the correct amount of material is ordered, managed, and installed, preventing costly overruns or critical shortages.
Who Should Use a CS Pipe Weight Calculator?
A wide range of professionals benefits from using a cs pipe weight calculator in kg:
- Engineers: For structural analysis, load calculations, and specifying materials.
- Procurement Managers: To accurately estimate material quantities for purchasing and budget planning.
- Project Managers: To track material costs, manage inventory, and ensure timely delivery.
- Logistics and Warehouse Staff: For planning shipping, storage, and handling procedures.
- Fabricators and Installers: To understand the weight of sections they are working with for safe assembly.
- DIY Enthusiasts and Hobbyists: For smaller-scale projects where material estimation is necessary.
Common Misconceptions about CS Pipe Weight
One common misconception is that all pipes of the same outer diameter weigh the same. This is incorrect, as wall thickness significantly impacts the volume of material and thus the weight. Another is assuming a standard density for all steel; while carbon steel is typically around 7850 kg/m³, variations can occur based on alloy composition. Our calculator uses a standard value but allows customization. Lastly, forgetting to account for the pipe's length is a frequent oversight; weight is directly proportional to length.
CS Pipe Weight Formula and Mathematical Explanation
The core principle behind calculating the cs pipe weight in kg is determining the volume of steel within the pipe and multiplying it by the material's density. The formula is derived from geometric principles and material science.
Derivation of the Formula
1. Calculate the cross-sectional area of the steel: A pipe is essentially a hollow cylinder. The cross-sectional area of the steel material is the area of the outer circle minus the area of the inner circle.
Area = (Area of Outer Circle) – (Area of Inner Circle)
Area = (π * (OD/2)²) – (π * (ID/2)²)
Area = (π/4) * (OD² – ID²)
Where OD is the Outside Diameter and ID is the Inner Diameter.
2. Convert units for consistency: Diameters are often given in millimeters (mm), while length is usually in meters (m), and density in kilograms per cubic meter (kg/m³). To use the area formula derived above with diameters in mm and get a volume in m³, we need careful unit conversion.
If OD and ID are in mm, then OD² and ID² are in mm².
Area in mm² = (π/4) * (OD² – ID²)
To convert mm² to m², we divide by (1000 mm/m)² = 1,000,000.
So, Area in m² = (π/4) * (OD² – ID²) / 1,000,000
3. Calculate the volume: The volume of the pipe material is the cross-sectional area multiplied by the length of the pipe.
Volume (m³) = Area (m²) * Length (m)
Volume (m³) = [ (π/4) * (OD² – ID²) / 1,000,000 ] * Length (m)
4. Calculate the weight: Weight is the volume multiplied by the density of the material.
Weight (kg) = Volume (m³) * Density (kg/m³)
Weight (kg) = [ (π/4) * (OD² – ID²) / 1,000,000 ] * Length (m) * Density (kg/m³)
5. Simplifying for practical use: Notice that the calculation involves π/4 and division by 1,000,000. The calculator uses a slightly rearranged form for clarity and computational efficiency, incorporating the '4' into the denominator.
A common practical formula, especially when working with diameters in mm and length in meters, simplifies as follows:
Inner Diameter (ID) in mm = Outside Diameter (OD) in mm – 2 * Wall Thickness (WT) in mm
Volume (m³) = [ (OD_mm² – ID_mm²) / 4 ] * π * Length_m * (1 / 1,000,000)
Weight (kg) = Volume (m³) * Density (kg/m³)
Weight (kg) = [ (OD_mm² – ID_mm²) / 4 ] * π * Length_m * (1 / 1,000,000) * Density_kg_m3
Weight (kg) = [ (OD_mm² – ID_mm²) * Length_m * Density_kg_m3 * π ] / 4,000,000
The calculator's simplified formula displayed is:
Weight (kg) = ( (OD² – ID²) / 4 ) * π * Length * Density / 1,000,000,000
This form implicitly handles the unit conversions when OD, ID are in mm, Length in meters, and Density in kg/m³. The 10^9 factor comes from: (1m/1000mm)³ for volume conversion, and the division by 4 for the area calculation.
More precisely:
ID in meters = ID_mm / 1000
OD in meters = OD_mm / 1000
Area in m² = (π/4) * ( (OD_mm/1000)² – (ID_mm/1000)² )
Area in m² = (π/4) * (1/1,000,000) * (OD_mm² – ID_mm²)
Volume in m³ = Area in m² * Length_m
Volume in m³ = (π/4) * (1/1,000,000) * (OD_mm² – ID_mm²) * Length_m
Weight in kg = Volume in m³ * Density_kg_m3
Weight in kg = (π * (OD_mm² – ID_mm²) * Length_m * Density_kg_m3) / 4,000,000
The calculator implements a direct approach using the provided formula:
`weight = (Math.PI / 4) * (Math.pow(OD_mm, 2) – Math.pow(ID_mm, 2)) * Length_m * Density_kg_m3 / 1000000;`
This correctly calculates volume in m³ and then weight in kg.
Variable Explanations
Here are the key variables used in the calculation:
| Variable |
Meaning |
Unit |
Typical Range |
| OD |
Outside Diameter of the pipe |
mm |
10 mm – 1200 mm (or more for large bore pipes) |
| WT |
Wall Thickness of the pipe |
mm |
0.5 mm – 50 mm (or more for high-pressure applications) |
| ID |
Inner Diameter of the pipe (Calculated: OD – 2*WT) |
mm |
Varies based on OD and WT |
| Length |
Total length of the pipe section |
Meters (m) |
1 m – 12 m (standard lengths), or custom |
| Density |
Mass per unit volume of the pipe material (Carbon Steel) |
kg/m³ |
7800 – 7870 kg/m³ (typically 7850 kg/m³) |
Practical Examples (Real-World Use Cases)
Understanding the practical application of the cs pipe weight calculator in kg is essential. Here are two examples illustrating its use:
Example 1: Fire Sprinkler System Piping
A contractor is installing a fire sprinkler system and needs to calculate the weight of several lengths of carbon steel pipe.
- Pipe Type: Welded
- Outside Diameter (OD): 114.3 mm
- Wall Thickness (WT): 5.0 mm
- Pipe Length: 6.0 meters
- Material Density: 7850 kg/m³
Using the calculator with these inputs:
Inputs: OD=114.3 mm, WT=5.0 mm, Length=6.0 m, Density=7850 kg/m³
Calculated Results:
Inner Diameter: 104.3 mm
Pipe Volume: 0.0509 m³
Linear Weight: 399.8 kg/m
Total Weight: 2398.8 kg
Interpretation: The contractor now knows that each 6-meter length of this specific pipe weighs approximately 2,399 kg. This information is critical for ordering the right amount of material, arranging for appropriate lifting equipment on-site, and ensuring the supporting structures are adequately designed. Accurate cs pipe weight in kg ensures project efficiency and safety.
Example 2: Industrial Process Piping
An engineer is designing a high-pressure industrial process line and needs to determine the weight of the primary conduit.
- Pipe Type: Seamless
- Outside Diameter (OD): 219.1 mm
- Wall Thickness (WT): 8.0 mm
- Pipe Length: 12.0 meters
- Material Density: 7850 kg/m³
Inputting these values into the cs pipe weight calculator in kg:
Inputs: OD=219.1 mm, WT=8.0 mm, Length=12.0 m, Density=7850 kg/m³
Calculated Results:
Inner Diameter: 203.1 mm
Pipe Volume: 0.367 m³
Linear Weight: 2883.1 kg/m
Total Weight: 34597.2 kg
Interpretation: Each 12-meter section of this heavy-duty pipe weighs approximately 34,597 kg. This substantial weight requires careful planning for transportation, lifting, and installation. The engineer uses this cs pipe weight in kg data for structural load calculations on surrounding equipment and foundations. Proper material estimation prevents delays and unexpected costs associated with handling significantly heavier components than anticipated.
How to Use This CS Pipe Weight Calculator
Our CS pipe weight calculator in kg is designed for ease of use and accuracy. Follow these simple steps to get your results:
- Select Pipe Type: Choose 'Seamless' or 'Welded' from the dropdown menu. While this calculator primarily focuses on dimensions and density, this selection can sometimes influence standard dimensions or tolerances in real-world applications (though not directly in this calculation).
- Enter Outside Diameter (OD): Input the outer diameter of the pipe in millimeters (mm). This is the measurement across the widest point of the pipe's exterior.
- Enter Wall Thickness (WT): Input the thickness of the pipe wall in millimeters (mm). This is the distance from the outer surface to the inner surface.
- Enter Pipe Length: Specify the total length of the pipe section you are calculating for, in meters (m).
- Confirm Material Density: The calculator defaults to 7850 kg/m³, the standard density for carbon steel. If you are working with a specific alloy that has a different density, you can update this value.
- Click 'Calculate Weight': Once all fields are filled, press the button.
Reading the Results
The calculator will display:
- Primary Result (Total Weight): The main output shows the total calculated weight of the pipe section in kilograms (kg). This is the most critical figure for procurement and logistics.
- Inner Diameter: The calculated internal diameter in mm, derived from OD and WT.
- Pipe Volume: The total volume of steel material in the pipe section, in cubic meters (m³).
- Linear Weight: The weight of the pipe per meter of length, in kg/m. This is useful for quick estimations and comparisons.
- Formula Explanation: A brief description of the calculation method used.
- Chart and Table: Visual and tabular representations provide further insights into weight variations with length and dimensions.
Decision-Making Guidance
Use the calculated cs pipe weight in kg to:
- Verify Material Orders: Ensure the quantity ordered matches the calculated requirement.
- Plan Logistics: Determine the type of transport (trucks, cranes) and handling equipment needed.
- Budget Accurately: Estimate the cost of materials based on weight.
- Structural Design: Inform structural engineers about the dead load imposed by the piping system.
Use the 'Reset' button to clear all fields and start over, and the 'Copy Results' button to easily transfer the calculated values to your reports or documents.
Key Factors That Affect CS Pipe Weight Results
While the formula for cs pipe weight in kg is straightforward, several real-world factors can influence the final weight and its practical implications. Understanding these nuances is key for precise project management.
-
Wall Thickness (WT): This is arguably the most significant factor after the diameter. A thicker wall directly translates to more steel volume and thus higher weight. Even small variations in WT (e.g., 0.5mm) can add up over long lengths, impacting total weight and cost. This is why accurate WT specification is critical.
-
Outside Diameter (OD): Similar to wall thickness, the OD dictates the overall size of the pipe. Larger OD pipes naturally contain more material, increasing weight, especially when combined with substantial wall thickness. The choice of OD is usually driven by flow rate requirements.
-
Pipe Length: Weight is directly proportional to length. A 12-meter pipe will weigh twice as much as a 6-meter pipe of identical specifications. Accurate length measurements on-site or accurate order specifications are crucial for calculating total material needs. This relationship is clearly visualized in the dynamic chart provided by the calculator.
-
Material Density: While carbon steel typically has a density around 7850 kg/m³, slight variations can occur due to alloying elements or manufacturing processes. For highly critical applications, using the exact density specified by the manufacturer is recommended. Our calculator allows you to adjust this parameter.
-
Manufacturing Tolerances: Pipes are manufactured within specific tolerances for OD and WT. These tolerances mean the actual pipe you receive might be slightly larger or smaller than specified, leading to minor deviations in weight. For most applications, standard tolerances are acceptable, but for extremely precise calculations, these variations should be considered.
-
Internal Coatings and External Coverings: The calculated weight is for the bare steel pipe. If pipes are lined internally (e.g., with cement or epoxy) or externally coated (e.g., with bitumen or plastic), this adds extra weight. These additional layers must be accounted for separately in logistical and structural planning.
-
Corrosion Allowance: Sometimes, pipes are designed with an extra allowance in wall thickness to account for material loss due to corrosion over time. This increases the initial weight compared to a pipe designed solely for the required pressure rating.
-
Service Conditions (Pressure & Temperature): While not directly affecting the *calculated* weight, the required pressure and temperature of the fluid being transported dictate the necessary pipe specifications (OD, WT, material grade), which in turn influence the weight. High-pressure applications typically demand thicker walls, increasing the cs pipe weight in kg.
Frequently Asked Questions (FAQ)
Q1: What is the standard density for carbon steel used in pipes?
The standard density for carbon steel is typically around 7850 kilograms per cubic meter (kg/m³). This value is used in most calculations, including this calculator by default.
Q2: How does pipe length affect the total weight?
The total weight of a pipe is directly proportional to its length. If you double the length of the pipe, you double its weight, assuming all other dimensions and material properties remain constant. This is a linear relationship.
Q3: Does the calculator account for threaded ends or special fittings?
No, this calculator determines the weight based on the standard cylindrical geometry (OD, WT, Length). It does not account for the added material or material removed for threads, bevels, or integrated fittings. These would require separate calculations.
Q4: Can I use this calculator for pipes made of other materials like stainless steel or PVC?
This calculator is specifically designed for carbon steel (CS) and uses a default density of 7850 kg/m³. For other materials like stainless steel (density around 8000 kg/m³) or PVC (density around 1400 kg/m³), you would need to adjust the 'Material Density' input accordingly, or use a calculator specifically designed for those materials.
Q5: What is the difference between seamless and welded pipes in terms of weight?
For the *same* OD and WT, a seamless pipe and a welded pipe will have virtually identical weights. The 'Pipe Type' selection in this calculator is more for context; the weight calculation depends purely on dimensions and density. However, manufacturing processes can lead to slight differences in standard available dimensions or tolerances between the two types.
Q6: My pipe specifications are in inches. How can I convert them?
You will need to convert your measurements to millimeters before using this calculator. 1 inch = 25.4 mm. For example, a 4-inch pipe has an OD of 4 * 25.4 = 101.6 mm.
Q7: Is the calculated weight the shipping weight or the theoretical weight?
This calculator provides the theoretical weight based on the nominal dimensions and material density. Actual shipping weight might vary slightly due to manufacturing tolerances, surface treatments, and packaging.
Q8: Why is calculating the pipe weight important for project management?
Accurate cs pipe weight in kg is crucial for budgeting (material costs), logistics (transportation and handling capacity), structural integrity (load calculations), and safety (ensuring equipment can handle the load). It prevents costly errors and delays.
Related Tools and Internal Resources
var chartInstance = null; // Variable to hold the chart instance
function updateUnitsAndDefaults() {
var pipeType = document.getElementById("pipeType").value;
// For this specific calculator, pipe type doesn't change units or density significantly for the core calculation.
// In a more complex calculator, this might adjust defaults or specific calculation paths.
console.log("Pipe type selected: " + pipeType);
}
function validateInput(id, min, max) {
var element = document.getElementById(id);
var errorElement = document.getElementById(id + "Error");
var value = parseFloat(element.value);
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errorElement.classList.add("visible");
return false;
}
errorElement.textContent = "";
errorElement.classList.remove("visible");
return true;
}
function calculateWeight() {
var isValid = true;
isValid = validateInput("outsideDiameter", 0) && isValid;
isValid = validateInput("wallThickness", 0) && isValid;
isValid = validateInput("pipeLength", 0) && isValid;
isValid = validateInput("materialDensity", 0) && isValid;
if (!isValid) {
document.getElementById("resultValue").textContent = "– kg";
document.getElementById("innerDiameterValue").innerHTML = 'Inner Diameter:
— mm';
document.getElementById("pipeVolumeValue").innerHTML = 'Pipe Volume:
— m³';
document.getElementById("linearWeightValue").innerHTML = 'Linear Weight:
— kg/m';
clearChart();
clearTable();
return;
}
var od = parseFloat(document.getElementById("outsideDiameter").value);
var wt = parseFloat(document.getElementById("wallThickness").value);
var length = parseFloat(document.getElementById("pipeLength").value);
var density = parseFloat(document.getElementById("materialDensity").value);
var id = od – 2 * wt;
var weight = 0;
var pipeVolume = 0;
var linearWeight = 0;
if (id < 0) {
document.getElementById("wallThicknessError").textContent = "Wall thickness is too large for the given outside diameter.";
document.getElementById("wallThicknessError").classList.add("visible");
isValid = false;
} else {
document.getElementById("wallThicknessError").classList.remove("visible");
}
if (isValid) {
// Formula explanation: Area of annulus * length * density
// Area = PI * (OD^2 – ID^2) / 4 (in mm^2)
// Convert Area to m^2: divide by 1,000,000 (1m = 1000mm, 1m^2 = 1,000,000 mm^2)
// Volume = Area_m2 * Length_m
// Weight = Volume * Density
// Weight (kg) = [ PI * (OD_mm^2 – ID_mm^2) / 4 ] * (1 / 1,000,000) * Length_m * Density_kg_m3
// Weight (kg) = ( PI * (OD_mm^2 – ID_mm^2) * Length_m * Density_kg_m3 ) / 4,000,000
var area_mm2 = (Math.PI / 4) * (Math.pow(od, 2) – Math.pow(id, 2));
pipeVolume = area_mm2 * length / 1000000; // Volume in m^3
weight = pipeVolume * density;
linearWeight = (pipeVolume / length) * density; // kg per meter
document.getElementById("resultValue").textContent = weight.toFixed(2) + " kg";
document.getElementById("innerDiameterValue").innerHTML = 'Inner Diameter:
' + id.toFixed(2) + ' mm';
document.getElementById("pipeVolumeValue").innerHTML = 'Pipe Volume:
' + pipeVolume.toFixed(4) + ' m³';
document.getElementById("linearWeightValue").innerHTML = 'Linear Weight:
' + linearWeight.toFixed(2) + ' kg/m';
updateChartAndTable(od, wt, density);
} else {
document.getElementById("resultValue").textContent = "– kg";
document.getElementById("innerDiameterValue").innerHTML = 'Inner Diameter:
— mm';
document.getElementById("pipeVolumeValue").innerHTML = 'Pipe Volume:
— m³';
document.getElementById("linearWeightValue").innerHTML = 'Linear Weight:
— kg/m';
clearChart();
clearTable();
}
}
function updateChartAndTable(od, wt, density) {
var chartLabels = [];
var chartDataWeight = [];
var tableRows = ";
var maxChartLength = 20; // Max length to display on chart for clarity
var numPoints = 10; // Number of points on the chart
for (var i = 1; i <= numPoints; i++) {
var currentLength = (i / numPoints) * maxChartLength;
chartLabels.push(currentLength.toFixed(1));
var currentId = od – 2 * wt;
var currentAreaMm2 = (Math.PI / 4) * (Math.pow(od, 2) – Math.pow(currentId, 2));
var currentVolumeM3 = currentAreaMm2 * currentLength / 1000000;
var currentWeight = currentVolumeM3 * density;
chartDataWeight.push(currentWeight);
tableRows += '
| ' + currentLength.toFixed(1) + ' | ' + currentWeight.toFixed(2) + ' | ' + currentId.toFixed(2) + ' |
';
}
document.getElementById("resultsTableBody").innerHTML = tableRows;
var ctx = document.getElementById('weightVsLengthChart').getContext('2d');
if (chartInstance) {
chartInstance.destroy(); // Destroy previous chart if it exists
}
chartInstance = new Chart(ctx, {
type: 'line',
data: {
labels: chartLabels,
datasets: [{
label: 'Pipe Weight (kg)',
data: chartDataWeight,
borderColor: '#004a99',
fill: false,
tension: 0.1
}]
},
options: {
responsive: true,
maintainAspectRatio: true,
scales: {
x: {
title: {
display: true,
text: 'Pipe Length (meters)'
}
},
y: {
title: {
display: true,
text: 'Weight (kg)'
},
beginAtZero: true
}
},
plugins: {
tooltip: {
callbacks: {
label: function(context) {
var label = context.dataset.label || ";
if (label) {
label += ': ';
}
if (context.parsed.y !== null) {
label += context.parsed.y.toFixed(2) + ' kg';
}
return label;
}
}
}
}
}
});
}
function clearChart() {
var canvas = document.getElementById('weightVsLengthChart');
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
if (chartInstance) {
chartInstance.destroy();
chartInstance = null;
}
}
function clearTable() {
document.getElementById("resultsTableBody").innerHTML = ";
}
function resetCalculator() {
document.getElementById("pipeType").value = "seamless";
document.getElementById("outsideDiameter").value = "";
document.getElementById("wallThickness").value = "";
document.getElementById("pipeLength").value = "";
document.getElementById("materialDensity").value = "7850";
document.getElementById("outsideDiameterError").textContent = "";
document.getElementById("outsideDiameterError").classList.remove("visible");
document.getElementById("wallThicknessError").textContent = "";
document.getElementById("wallThicknessError").classList.remove("visible");
document.getElementById("pipeLengthError").textContent = "";
document.getElementById("pipeLengthError").classList.remove("visible");
document.getElementById("materialDensityError").textContent = "";
document.getElementById("materialDensityError").classList.remove("visible");
document.getElementById("resultValue").textContent = "– kg";
document.getElementById("innerDiameterValue").innerHTML = 'Inner Diameter:
— mm';
document.getElementById("pipeVolumeValue").innerHTML = 'Pipe Volume:
— m³';
document.getElementById("linearWeightValue").innerHTML = 'Linear Weight:
— kg/m';
clearChart();
clearTable();
document.getElementById("copyConfirm").style.display = "none";
}
function copyResults() {
var mainResult = document.getElementById("resultValue").textContent;
var idValue = document.getElementById("innerDiameterValue").textContent.replace("Inner Diameter: ", "");
var volumeValue = document.getElementById("pipeVolumeValue").textContent.replace("Pipe Volume: ", "");
var linearWeightValue = document.getElementById("linearWeightValue").textContent.replace("Linear Weight: ", "");
var formulaText = "Formula Used: Weight (kg) = ( (OD² – ID²) / 4 ) * π * Length * Density / 1,000,000,000";
var assumptions = "Assumptions:\n" +
"OD: " + document.getElementById("outsideDiameter").value + " mm\n" +
"WT: " + document.getElementById("wallThickness").value + " mm\n" +
"Length: " + document.getElementById("pipeLength").value + " m\n" +
"Density: " + document.getElementById("materialDensity").value + " kg/m³";
var resultsText = "CS Pipe Weight Calculation Results:\n" +
mainResult + "\n" +
idValue + "\n" +
volumeValue + "\n" +
linearWeightValue + "\n\n" +
formulaText + "\n\n" +
assumptions;
// Use the modern Clipboard API if available, otherwise fallback
if (navigator.clipboard && navigator.clipboard.writeText) {
navigator.clipboard.writeText(resultsText).then(function() {
var confirmMessage = document.getElementById("copyConfirm");
confirmMessage.style.display = "block";
setTimeout(function(){ confirmMessage.style.display = "none"; }, 3000);
}).catch(function(err) {
console.error("Failed to copy text: ", err);
// Fallback for browsers that don't support navigator.clipboard
copyTextFallback(resultsText);
});
} else {
// Fallback method for older browsers
copyTextFallback(resultsText);
}
}
function copyTextFallback(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
textArea.style.position = "fixed";
textArea.style.left = "-9999px";
textArea.style.top = "-9999px";
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
if (successful) {
var confirmMessage = document.getElementById("copyConfirm");
confirmMessage.style.display = "block";
setTimeout(function(){ confirmMessage.style.display = "none"; }, 3000);
} else {
console.error("Fallback: Could not copy text.");
}
} catch (err) {
console.error("Fallback: Error during copy command: ", err);
}
document.body.removeChild(textArea);
}
// Initial calculation on load if inputs have default values (optional)
// document.addEventListener('DOMContentLoaded', function() {
// // Check if default values are set and run calculation
// if (document.getElementById("outsideDiameter").value && document.getElementById("wallThickness").value && document.getElementById("pipeLength").value) {
// calculateWeight();
// }
// });
// Register Chart.js if not already loaded (basic example, in production you'd load it properly)
// Assuming Chart.js is available globally. In a real app, you'd include it via
if (typeof Chart === 'undefined') {
console.error("Chart.js is not loaded. Please include Chart.js library.");
// Placeholder for chart initialization if library is missing, will result in no chart.
}