Effortlessly calculate the weight of pipes for your engineering and construction needs.
Pipe Weight Calculator
Steel (Carbon Steel)
Stainless Steel
Cast Iron
Copper
Aluminum
Select the material of the pipe.
Enter the external diameter of the pipe (e.g., in mm or inches).
Enter the thickness of the pipe wall (e.g., in mm or inches).
Enter the total length of the pipe (e.g., in meters or feet).
Meters
Feet
Select the unit for pipe length.
Millimeters (mm)
Inches (in)
Select the unit for Outer Diameter and Wall Thickness.
Calculation Results
Pipe Volume:
Pipe Cross-sectional Area:
Material Density Used:
Formula Used: Weight = Volume × Density. Volume is calculated as (π/4) × (OD² – ID²) × Length, where ID = OD – 2 × Wall Thickness.
Pipe Weight vs. Length
Material Properties (Density)
Material
Density (kg/m³)
Steel (Carbon Steel)
7850
Stainless Steel
8000
Cast Iron
7200
Copper
8960
Aluminum
2700
What is Pipe Weight Calculation?
The **pipe weight calculation** is a fundamental process in engineering, construction, and logistics used to determine the mass of a given length of pipe. This calculation is critical for various applications, including structural design, material procurement, transportation logistics, and cost estimation. Understanding the precise **pipe weight** helps professionals ensure structural integrity, manage project budgets effectively, and comply with safety regulations.
Who Should Use It?
Professionals across several industries rely on the **pipe weight calculator online**:
Structural Engineers: To verify the load-bearing capacity of piping systems and ensure they meet design specifications.
Project Managers: For accurate material ordering, budgeting, and managing the logistics of transporting pipes.
Procurement Specialists: To obtain quotes and compare suppliers based on the quantity and weight of materials.
Fabricators and Installers: To plan handling, lifting, and installation procedures, ensuring safety and efficiency.
Inventory Managers: To maintain accurate stock levels and manage warehouse space.
Common Misconceptions
A common misconception is that all pipes of the same outer diameter and length weigh the same. This is incorrect, as wall thickness and material density significantly influence the final **pipe weight**. Another misconception is that standard weight calculations are sufficient for all specialized applications; however, specific industry standards (like ASME, API) might have nuances that affect precise calculations, although this general calculator provides a solid baseline.
Pipe Weight Calculation Formula and Mathematical Explanation
The core principle behind calculating **pipe weight** is determining the volume of the pipe material and multiplying it by the material's density. The formula can be broken down as follows:
2. Calculate the Cross-Sectional Area of the Pipe Material:
Area = (π / 4) × (OD² – ID²)
3. Calculate the Volume of the Pipe Material:
Volume = Area × Pipe Length
4. Calculate the Total Weight:
Weight = Volume × Material Density
The result of this **pipe weight calculation** is typically expressed in kilograms (kg) or pounds (lbs).
Variable Explanations
Let's define the variables used in the **pipe weight calculation**:
Variable
Meaning
Unit
Typical Range / Notes
OD
Outer Diameter
mm, inches
Varies based on pipe type and application (e.g., 20mm to 1000mm)
Wall Thickness (WT)
Thickness of the pipe wall
mm, inches
Varies based on pressure rating and application (e.g., 1mm to 20mm)
ID
Inner Diameter
mm, inches
Calculated: OD – 2 × WT
Area
Cross-sectional Area of the pipe material
mm², inches²
Calculated
Length
Total length of the pipe section
Meters, Feet
Standard lengths (e.g., 6m, 12m) or custom cuts
Density
Mass per unit volume of the pipe material
kg/m³ (or lbs/ft³)
Material-dependent (e.g., Steel ~7850 kg/m³)
Weight
Total mass of the pipe section
kg, lbs
Calculated result
Practical Examples (Real-World Use Cases)
Example 1: Calculating the Weight of a Carbon Steel Pipe
A project requires a 6-meter (approx. 19.7 ft) section of carbon steel pipe with an outer diameter (OD) of 114.3 mm (approx. 4.5 inches) and a wall thickness (WT) of 6.0 mm (approx. 0.236 inches). We need to determine its weight.
Inputs:
Pipe Material: Carbon Steel
Outer Diameter (OD): 114.3 mm
Wall Thickness (WT): 6.0 mm
Pipe Length: 6 meters
Length Unit: Meters
Dimension Unit: Millimeters (mm)
Calculations:
Inner Diameter (ID) = 114.3 mm – 2 × 6.0 mm = 102.3 mm
A 6-meter section of this specific carbon steel pipe weighs approximately 97.92 kg. This information is crucial for ordering the correct quantity of material and planning for its transportation and installation. This **pipe weight calculation** is fundamental for accurate project costing.
Example 2: Weight of an Aluminum Pipe Section for HVAC
An HVAC contractor needs to calculate the weight of a 20-foot section of aluminum pipe with an OD of 4 inches and a wall thickness of 0.120 inches.
The 20-foot section of aluminum pipe weighs approximately 66.96 lbs. This is important for load calculations on support structures and for safe handling during installation. Using an accurate **pipe weight calculator online** ensures these details are readily available. This calculation also helps in comparing material costs per unit length.
How to Use This Pipe Weight Calculator
Our **online pipe weight calculator** is designed for simplicity and accuracy. Follow these steps to get your results:
Select Pipe Material: Choose the material of your pipe from the dropdown list (e.g., Steel, Stainless Steel, Copper). The calculator will use the standard density for this material.
Enter Outer Diameter (OD): Input the external diameter of the pipe. Ensure you select the correct unit (mm or inches) using the "Dimension Unit" dropdown.
Enter Wall Thickness: Provide the thickness of the pipe wall. Use the same unit as the OD.
Enter Pipe Length: Specify the total length of the pipe section you are interested in. Select the appropriate unit (Meters or Feet).
Click "Calculate Weight": Once all fields are filled, click the button.
How to Read Results
The calculator will display:
Primary Result (Total Pipe Weight): This is the most prominent figure, showing the calculated weight of the entire pipe section in kilograms (kg) or pounds (lbs), depending on the input units and internal conversions.
Intermediate Values: You'll see the calculated Pipe Volume, Pipe Cross-sectional Area, and the Material Density used in the calculation. These provide transparency and context for the main result.
Formula Explanation: A brief explanation of the underlying formula used for clarity.
Decision-Making Guidance
Use the results to:
Procurement: Order the correct quantity of pipe based on weight and length.
Logistics: Plan transportation, ensuring vehicles have adequate capacity and rigging equipment is suitable for the load.
Engineering: Verify that structural supports can handle the weight of the piping system.
Budgeting: Estimate material costs more accurately.
Click "Copy Results" to easily transfer the data to your reports or spreadsheets. Use the "Reset" button to clear the fields and start a new calculation.
Key Factors That Affect Pipe Weight Results
Several factors influence the outcome of a **pipe weight calculation**. Understanding these is key to obtaining accurate results:
Material Density: This is arguably the most significant factor after geometry. Different materials (steel, copper, aluminum, plastics) have vastly different densities. Using the correct density for the specific alloy or grade of the material is crucial. Our calculator uses typical values, but specialized alloys might vary.
Outer Diameter (OD): A larger OD for the same wall thickness means more material and thus higher weight. Precision in measuring the OD is important.
Wall Thickness (WT): Even small variations in wall thickness can lead to substantial differences in weight, especially for large-diameter pipes or pipes intended for high-pressure applications. Thicker walls significantly increase weight.
Pipe Length: Naturally, a longer pipe section will weigh more than a shorter one, assuming all other factors are equal. This is a linear relationship in the **pipe weight calculation**.
Units of Measurement: Inconsistent units (e.g., mixing mm and meters without proper conversion) can lead to drastically incorrect volume calculations and, consequently, weight. Ensure all dimensions are in a consistent system (e.g., all metric or all imperial) before calculation, or use a calculator that handles unit conversions properly.
Tolerances: Manufacturing processes involve tolerances for OD and wall thickness. Standard calculations often use nominal (specified) dimensions. Actual weights can vary slightly due to these manufacturing tolerances. For critical applications, it might be necessary to consider the maximum possible weight based on upper tolerance limits.
Internal Coatings/Linings: Some pipes have internal coatings (like cement mortar lining) or external coatings (like bitumen or epoxy) for corrosion protection or flow enhancement. These add extra weight not accounted for in basic geometric calculations.
Threaded Ends or Special Connections: Pipes with threaded ends or specialized couplings will have a higher weight than a plain-ended pipe of the same nominal dimensions.
Frequently Asked Questions (FAQ)
Q1: What is the standard density for steel pipes?
A: The standard density for carbon steel is approximately 7850 kg/m³ (or 490 lbs/ft³). Stainless steel is slightly denser, around 8000 kg/m³. Our calculator uses these typical values.
Q2: Does the calculator account for different pipe standards (e.g., Schedule 40, Schedule 80)?
A: This calculator uses Outer Diameter (OD) and Wall Thickness (WT) as direct inputs. You can achieve the same results as specific schedules by entering the corresponding OD and WT values for that schedule. For example, for Schedule 40 steel pipe, you would input the Schedule 40 OD and WT.
Q3: Can I calculate the weight of plastic pipes?
A: This calculator is primarily designed for metallic pipes where density is a key factor. While you could input a density for plastic (e.g., PVC is around 1400 kg/m³), the structural properties and handling considerations for plastic pipes differ significantly. For plastic pipes, specific product datasheets are often more reliable.
Q4: What if my pipe dimensions are in different units?
A: Use the "Dimension Unit" dropdown to select the unit (mm or inches) for OD and Wall Thickness, and the "Length Unit" for the pipe length. The calculator handles the necessary conversions to provide a consistent weight output. Ensure you select the correct units before entering values.
Q5: How accurate is this pipe weight calculator online?
A: The accuracy depends on the precision of your input values and the standard density values used for each material. The geometric calculations are precise. For critical engineering projects, always cross-reference with manufacturer data sheets and relevant industry standards.
Q6: Can this calculator determine the weight of fittings or elbows?
A: No, this calculator is specifically for straight pipe sections. Fittings, elbows, tees, and flanges have complex geometries and require different calculation methods or manufacturer-specific data.
Q7: What is the difference between weight and mass?
A: In common usage, "weight" often refers to mass. Technically, weight is a force (mass × gravity). This calculator determines the *mass* of the pipe, which is often colloquially referred to as weight. The output units (kg, lbs) represent mass.
Q8: How do I find the specific density of an exotic alloy?
A: For exotic alloys or specialized materials not listed, you will need to consult the material manufacturer's technical data sheet or a reliable materials properties database for the precise density value. You can then use a more advanced calculator or manual calculation.
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var materialDensities = {
steel: 7850, // kg/m³
stainless_steel: 8000, // kg/m³
cast_iron: 7200, // kg/m³
copper: 8960, // kg/m³
aluminum: 2700 // kg/m³
};
var chartInstance = null;
function updateChart(length, weight) {
var canvas = document.getElementById('pipeWeightChart');
if (chartInstance) {
chartInstance.destroy();
}
var ctx = canvas.getContext('2d');
var maxBars = 5; // Number of data points to show on chart
var lengths = [];
var weights = [];
// Generate data points for the chart
var step = Math.max(1, Math.floor(length / maxBars));
for (var i = 0; i 0) {
lengths.push(currentLength);
weights.push(calculateWeightForLength(currentLength));
}
}
// Ensure the exact input length is included if not already
if (length > 0 && !lengths.includes(length)) {
lengths.push(length);
weights.push(weight);
lengths.sort(function(a, b){return a – b}); // Sort lengths
weights = lengths.map(function(l) { return calculateWeightForLength(l); }); // Recalculate weights in order
}
chartInstance = new Chart(ctx, {
type: 'bar',
data: {
labels: lengths.map(function(l) { return l.toFixed(2); }),
datasets: [{
label: 'Pipe Weight (kg or lbs)',
data: weights.map(function(w) { return w.toFixed(2); }),
backgroundColor: 'rgba(0, 74, 153, 0.6)',
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: true,
scales: {
x: {
title: {
display: true,
text: 'Pipe Length (' + document.getElementById('lengthUnit').value + ')'
}
},
y: {
title: {
display: true,
text: 'Weight (kg or lbs)'
},
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 + ' ' + (document.getElementById('lengthUnit').value === 'meter' ? 'kg' : 'lbs');
}
return label;
}
}
}
}
}
});
}
function calculateWeightForLength(len) {
var odInput = document.getElementById('outerDiameter');
var wtInput = document.getElementById('wallThickness');
var lengthInput = document.getElementById('pipeLength'); // Original input for reference
var lengthUnit = document.getElementById('lengthUnit').value;
var dimensionUnit = document.getElementById('dimensionUnit').value;
var od = parseFloat(odInput.value);
var wt = parseFloat(wtInput.value);
var currentLength = len; // Use the length passed to the function
if (isNaN(od) || isNaN(wt) || isNaN(currentLength) || od <= 0 || wt <= 0 || currentLength <= 0) {
return 0; // Return 0 if inputs are invalid for intermediate calculation
}
// Unit conversions
var od_m = od;
var wt_m = wt;
var len_m = currentLength;
if (dimensionUnit === 'inch') {
od_m = od * 0.0254; // Convert inches to meters
wt_m = wt * 0.0254; // Convert inches to meters
}
if (lengthUnit === 'feet') {
len_m = currentLength * 0.3048; // Convert feet to meters
}
var id_m = od_m – (2 * wt_m);
if (id_m <= 0) return 0; // Inner diameter must be positive
var area_m2 = (Math.PI / 4) * (Math.pow(od_m, 2) – Math.pow(id_m, 2));
var volume_m3 = area_m2 * len_m;
var material = document.getElementById('pipeMaterial').value;
var density = materialDensities[material];
if (isNaN(density)) return 0; // Invalid density
var weight = volume_m3 * density; // Weight in kg
// Convert to lbs if length unit was feet
if (lengthUnit === 'feet') {
weight = weight * 2.20462; // Convert kg to lbs
}
return weight;
}
function calculatePipeWeight() {
var odInput = document.getElementById('outerDiameter');
var wtInput = document.getElementById('wallThickness');
var lengthInput = document.getElementById('pipeLength');
var lengthUnit = document.getElementById('lengthUnit').value;
var dimensionUnit = document.getElementById('dimensionUnit').value;
var odError = document.getElementById('outerDiameterError');
var wtError = document.getElementById('wallThicknessError');
var lengthError = document.getElementById('pipeLengthError');
// Clear previous errors
odError.style.display = 'none';
wtError.style.display = 'none';
lengthError.style.display = 'none';
var od = parseFloat(odInput.value);
var wt = parseFloat(wtInput.value);
var length = parseFloat(lengthInput.value);
var isValid = true;
if (isNaN(od) || od <= 0) {
odError.textContent = "Please enter a valid positive Outer Diameter.";
odError.style.display = 'block';
isValid = false;
}
if (isNaN(wt) || wt <= 0) {
wtError.textContent = "Please enter a valid positive Wall Thickness.";
wtError.style.display = 'block';
isValid = false;
}
if (isNaN(length) || length = od)) {
odError.textContent = "Wall Thickness cannot be greater than or equal to half the Outer Diameter.";
odError.style.display = 'block';
wtError.textContent = "Wall Thickness cannot be greater than or equal to half the Outer Diameter.";
wtError.style.display = 'block';
isValid = false;
}
if (!isValid) {
document.getElementById('resultsContainer').style.display = 'none';
return;
}
// Unit conversions to a common base (meters for calculations)
var od_m = od;
var wt_m = wt;
var len_m = length;
if (dimensionUnit === 'inch') {
od_m = od * 0.0254; // Convert inches to meters
wt_m = wt * 0.0254; // Convert inches to meters
}
if (lengthUnit === 'feet') {
len_m = length * 0.3048; // Convert feet to meters
}
var id_m = od_m – (2 * wt_m);
if (id_m = od
// but as a fallback:
document.getElementById('resultsContainer').style.display = 'none';
return;
}
var area_m2 = (Math.PI / 4) * (Math.pow(od_m, 2) – Math.pow(id_m, 2));
var volume_m3 = area_m2 * len_m;
var material = document.getElementById('pipeMaterial').value;
var density = materialDensities[material];
if (isNaN(density)) {
// Should not happen with predefined materials, but good practice
document.getElementById('resultsContainer').style.display = 'none';
return;
}
var weight_kg = volume_m3 * density; // Weight in kg
var finalWeight = weight_kg;
var weightUnit = 'kg';
if (lengthUnit === 'feet') {
finalWeight = weight_kg * 2.20462; // Convert kg to lbs
weightUnit = 'lbs';
}
// Display results
document.getElementById('primaryResult').textContent = finalWeight.toFixed(2) + ' ' + weightUnit;
document.getElementById('pipeVolume').textContent = volume_m3.toFixed(4) + ' m³';
document.getElementById('pipeCrossSectionalArea').textContent = (area_m2 * Math.pow(1000, 2)).toFixed(2) + ' mm²'; // Display area in mm² for context
document.getElementById('materialDensity').textContent = density + ' kg/m³';
document.getElementById('resultsContainer').style.display = 'block';
// Update chart
updateChart(length, finalWeight);
}
function resetCalculator() {
document.getElementById('pipeMaterial').value = 'steel';
document.getElementById('outerDiameter').value = '100';
document.getElementById('wallThickness').value = '5';
document.getElementById('pipeLength').value = '6';
document.getElementById('lengthUnit').value = 'meter';
document.getElementById('dimensionUnit').value = 'mm';
// Clear errors
document.getElementById('outerDiameterError').style.display = 'none';
document.getElementById('wallThicknessError').style.display = 'none';
document.getElementById('pipeLengthError').style.display = 'none';
// Hide results
document.getElementById('resultsContainer').style.display = 'none';
// Clear chart
if (chartInstance) {
chartInstance.destroy();
chartInstance = null;
}
// Reset canvas visually
var canvas = document.getElementById('pipeWeightChart');
var ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height);
}
function copyResults() {
var primaryResult = document.getElementById('primaryResult').textContent;
var pipeVolume = document.getElementById('pipeVolume').textContent;
var pipeArea = document.getElementById('pipeCrossSectionalArea').textContent;
var materialDensity = document.getElementById('materialDensity').textContent;
var material = document.getElementById('pipeMaterial').options[document.getElementById('pipeMaterial').selectedIndex].text;
var od = document.getElementById('outerDiameter').value;
var wt = document.getElementById('wallThickness').value;
var length = document.getElementById('pipeLength').value;
var lengthUnit = document.getElementById('lengthUnit').value;
var dimUnit = document.getElementById('dimensionUnit').value;
var textToCopy = "Pipe Weight Calculation Results:\n\n";
textToCopy += "Primary Result: " + primaryResult + "\n";
textToCopy += "Pipe Volume: " + pipeVolume + "\n";
textToCopy += "Pipe Cross-sectional Area: " + pipeArea + "\n";
textToCopy += "Material Density Used: " + materialDensity + "\n\n";
textToCopy += "— Input Parameters —\n";
textToCopy += "Material: " + material + "\n";
textToCopy += "Outer Diameter: " + od + " " + dimUnit + "\n";
textToCopy += "Wall Thickness: " + wt + " " + dimUnit + "\n";
textToCopy += "Pipe Length: " + length + " " + lengthUnit + "\n";
// Use navigator.clipboard for modern browsers
if (navigator.clipboard && navigator.clipboard.writeText) {
navigator.clipboard.writeText(textToCopy).then(function() {
alert('Results copied to clipboard!');
}).catch(function(err) {
console.error('Failed to copy text: ', err);
fallbackCopyTextToClipboard(textToCopy);
});
} else {
fallbackCopyTextToClipboard(textToCopy);
}
}
function fallbackCopyTextToClipboard(text) {
var textArea = document.createElement("textarea");
textArea.value = text;
// Avoid scrolling to bottom
textArea.style.position="absolute";
textArea.style.left="-9999px";
document.body.setAttribute('style', 'position:relative');
textArea.style.top="0″;
document.body.appendChild(textArea);
textArea.focus();
textArea.select();
try {
var successful = document.execCommand('copy');
var msg = successful ? 'Results copied to clipboard!' : 'Failed to copy results.';
alert(msg);
} catch (err) {
console.error('Fallback: Oops, unable to copy', err);
alert('Failed to copy results. Please copy manually.');
}
document.body.removeChild(textArea);
}
// Add Chart.js script dynamically if not already present
// This is a simplified approach; in a real app, you'd manage dependencies better.
// For a single-file HTML, we assume it needs to be loaded.
// NOTE: In a production WordPress environment, you'd enqueue this script properly.
// For this standalone HTML, we'll embed it.
// To make this truly self-contained without external script tags, Chart.js itself would need to be inlined or bundled.
// As per instructions, NO external libraries mentioned. This requires native canvas or SVG.
// Let's implement a basic chart using pure SVG or Canvas API without Chart.js if possible per constraint.
// Given the complexity of dynamic charts, a library like Chart.js is typical.
// REVISING: The instruction says "Native OR Pure SVG". Chart.js IS an external library.
// Re-implementing chart logic without Chart.js.
// — Re-implementing Chart with Native Canvas API —
var myChart = null; // Global variable for the chart instance
function drawChart(chartId, labels, data, yAxisLabel, xAxisLabel, title) {
var canvas = document.getElementById(chartId);
var ctx = canvas.getContext('2d');
if (myChart) {
myChart.destroy(); // Destroy previous chart instance if it exists
}
// Clear canvas before drawing
ctx.clearRect(0, 0, canvas.width, canvas.height);
// Basic chart drawing logic (simplified bar chart)
var chartData = {
labels: labels,
datasets: [{
label: title,
data: data,
backgroundColor: 'rgba(0, 74, 153, 0.6)',
borderColor: 'rgba(0, 74, 153, 1)',
borderWidth: 1
}]
};
var chartOptions = {
responsive: true,
maintainAspectRatio: false, // Allow chart to fill container height
scales: {
x: {
title: {
display: true,
text: xAxisLabel
}
},
y: {
title: {
display: true,
text: yAxisLabel
},
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) + ' ' + yAxisLabel.split('(')[1].slice(0,-1); // Extract unit
}
return label;
}
}
}
}
};
// Function to get max value for y-axis scaling
var maxY = Math.max(…data);
if (maxY === 0) maxY = 1; // Prevent division by zero if all data is 0
var scaleMax = maxY * 1.1; // Add some padding
// Adjust scale if necessary
chartOptions.scales.y.max = scaleMax;
// — Manual Chart Rendering —
// This part is complex and usually handled by libraries.
// For a simple bar chart representation without external libs, it's tricky.
// Acknowledging the complexity, I will simulate the chart update logic
// but a full native Canvas rendering is extensive.
// For demonstration, let's imagine `myChart` is a placeholder for a drawn chart.
// To truly avoid libraries, one might use SVG or complex Canvas API calls.
// Given the constraint of "pure SVG" OR "native ", and avoiding libraries,
// I will simulate the data update for a hypothetical chart rendering.
// — Placeholder for Native Canvas Rendering —
// The implementation below mimics Chart.js structure but is NOT Chart.js.
// A real native implementation would involve calculating bar positions,
// drawing axes, labels, etc., manually. This is highly complex for a
// single-file output and prone to errors without a library.
// Simplified approach: Update data if a chart rendering function existed.
// Since a full native canvas implementation is beyond scope for this format,
// I'll update the `updateChart` function to call a placeholder.
// Let's use a placeholder structure that *would* be filled by native canvas drawing.
// The `updateChart` function is called, and it prepares `labels` and `data`.
// The actual drawing needs to happen here.
// If I MUST provide a visual, I'd use SVG for simplicity.
// Let's pivot to SVG for the chart.
}
// — SVG Chart Implementation —
var svgChartContainer = null;
function updateSvgChart(chartContainerId, labels, data, yAxisLabel, xAxisLabel, title) {
var container = document.getElementById(chartContainerId);
if (!container) return;
container.innerHTML = "; // Clear previous content
var svgNS = "http://www.w3.org/2000/svg";
var svg = document.createElementNS(svgNS, "svg");
var width = container.clientWidth;
var height = 300; // Fixed height for the SVG chart area
svg.setAttribute('width', width);
svg.setAttribute('height', height);
svg.setAttribute('viewBox', '0 0 ' + width + ' ' + height);
container.appendChild(svg);
var padding = { top: 30, right: 20, bottom: 60, left: 70 }; // Adjusted padding for labels
var chartWidth = width – padding.left – padding.right;
var chartHeight = height – padding.top – padding.bottom;
if (chartWidth <= 0 || chartHeight <= 0) return; // Ensure dimensions are valid
// Find max value for Y-axis scaling
var maxY = 0;
for (var i = 0; i maxY) {
maxY = data[i];
}
}
if (maxY === 0) maxY = 1; // Avoid division by zero
var scaleMax = maxY * 1.1; // Add 10% padding
// Draw X-axis
var xAxis = document.createElementNS(svgNS, "line");
xAxis.setAttribute('x1', padding.left);
xAxis.setAttribute('y1', padding.top + chartHeight);
xAxis.setAttribute('x2', padding.left + chartWidth);
xAxis.setAttribute('y2', padding.top + chartHeight);
xAxis.setAttribute('stroke', '#666');
xAxis.setAttribute('stroke-width', '1');
svg.appendChild(xAxis);
// Draw Y-axis
var yAxis = document.createElementNS(svgNS, "line");
yAxis.setAttribute('x1', padding.left);
yAxis.setAttribute('y1', padding.top + chartHeight);
yAxis.setAttribute('x2', padding.left);
yAxis.setAttribute('y2', padding.top);
yAxis.setAttribute('stroke', '#666');
yAxis.setAttribute('stroke-width', '1');
svg.appendChild(yAxis);
// Draw X-axis labels and ticks
var tickSpacingX = chartWidth / (labels.length > 1 ? labels.length – 1 : 1);
for (var i = 0; i < labels.length; i++) {
var xPos = padding.left + i * tickSpacingX;
var tick = document.createElementNS(svgNS, "line");
tick.setAttribute('x1', xPos);
tick.setAttribute('y1', padding.top + chartHeight);
tick.setAttribute('x2', xPos);
tick.setAttribute('y2', padding.top + chartHeight + 5);
tick.setAttribute('stroke', '#666');
svg.appendChild(tick);
var text = document.createElementNS(svgNS, "text");
text.setAttribute('x', xPos);
text.setAttribute('y', padding.top + chartHeight + 15); // Position below tick
text.setAttribute('text-anchor', 'middle');
text.setAttribute('fill', '#333');
text.setAttribute('font-size', '10px');
text.textContent = labels[i];
svg.appendChild(text);
}
// Draw Y-axis labels and ticks (simplified: 3-5 ticks)
var numYTicks = 5;
for (var i = 0; i <= numYTicks; i++) {
var yValue = scaleMax * (i / numYTicks);
var yPos = padding.top + chartHeight – (yValue / scaleMax) * chartHeight;
if (yPos < padding.top) yPos = padding.top; // Ensure it doesn't go above top padding
var tick = document.createElementNS(svgNS, "line");
tick.setAttribute('x1', padding.left – 5);
tick.setAttribute('y1', yPos);
tick.setAttribute('x2', padding.left);
tick.setAttribute('y2', yPos);
tick.setAttribute('stroke', '#666');
svg.appendChild(tick);
var text = document.createElementNS(svgNS, "text");
text.setAttribute('x', padding.left – 10);
text.setAttribute('y', yPos + 3); // Vertical alignment adjustment
text.setAttribute('text-anchor', 'end');
text.setAttribute('fill', '#333');
text.setAttribute('font-size', '10px');
text.textContent = yValue.toFixed(0); // Display value
svg.appendChild(text);
}
// X Axis Title
var xAxisTitle = document.createElementNS(svgNS, "text");
xAxisTitle.setAttribute('x', padding.left + chartWidth / 2);
xAxisTitle.setAttribute('y', height – 10); // Position at bottom
xAxisTitle.setAttribute('text-anchor', 'middle');
xAxisTitle.setAttribute('fill', '#004a99');
xAxisTitle.setAttribute('font-weight', 'bold');
xAxisTitle.textContent = xAxisLabel;
svg.appendChild(xAxisTitle);
// Y Axis Title
var yAxisTitle = document.createElementNS(svgNS, "text");
yAxisTitle.setAttribute('transform', 'rotate(-90)');
yAxisTitle.setAttribute('x', – (padding.top + chartHeight / 2));
yAxisTitle.setAttribute('y', padding.left – 30); // Adjust position
yAxisTitle.setAttribute('text-anchor', 'middle');
yAxisTitle.setAttribute('fill', '#004a99');
yAxisTitle.setAttribute('font-weight', 'bold');
yAxisTitle.textContent = yAxisLabel;
svg.appendChild(yAxisTitle);
// Draw bars
var barWidth = chartWidth / labels.length * 0.7; // 70% of space allocated per label
var barSpacing = chartWidth / labels.length * 0.3 / 2; // Half of remaining space for spacing
for (var i = 0; i < data.length; i++) {
var barHeight = (data[i] / scaleMax) * chartHeight;
var xPos = padding.left + i * tickSpacingX + barSpacing;
var yPos = padding.top + chartHeight – barHeight;
var rect = document.createElementNS(svgNS, "rect");
rect.setAttribute('x', xPos);
rect.setAttribute('y', yPos);
rect.setAttribute('width', barWidth);
rect.setAttribute('height', barHeight);
rect.setAttribute('fill', 'rgba(0, 74, 153, 0.6)');
rect.setAttribute('stroke', 'rgba(0, 74, 153, 1)');
rect.setAttribute('stroke-width', '1');
svg.appendChild(rect);
// Add tooltips (simplified) – requires interaction handling not implemented here for brevity
// A full implementation would involve adding title attributes or event listeners
rect.addEventListener('mouseover', function(event) {
// This basic version doesn't have a robust tooltip system like Chart.js
// We can add a title attribute as a fallback
var tooltipText = labels[i] + ': ' + data[i].toFixed(2) + ' ' + yAxisLabel.split('(')[1].slice(0,-1);
rect.setAttribute('title', tooltipText);
});
}
// Add chart title
var chartTitleText = document.createElementNS(svgNS, "text");
chartTitleText.setAttribute('x', width / 2);
chartTitleText.setAttribute('y', padding.top – 10); // Position above the chart area
chartTitleText.setAttribute('text-anchor', 'middle');
chartTitleText.setAttribute('fill', '#004a99');
chartTitleText.setAttribute('font-size', '14px');
chartTitleText.setAttribute('font-weight', 'bold');
chartTitleText.textContent = title;
svg.appendChild(chartTitleText);
}
function updateChart(length, weight) {
var lengthUnit = document.getElementById('lengthUnit').value;
var dimensionUnit = document.getElementById('dimensionUnit').value;
var material = document.getElementById('pipeMaterial').value;
var maxBars = 5;
var lengthsForChart = [];
var weightsForChart = [];
// Ensure length is positive before proceeding
if (length <= 0) {
updateSvgChart('pipeWeightChart', [], [], '', '', '');
return;
}
// Generate data points for the chart
// Calculate intermediate lengths based on the input length
var lengthIncrement = length / maxBars;
if (lengthIncrement < 0.1) lengthIncrement = 0.1; // Minimum increment for visibility
for (var i = 1; i length) currentLength = length; // Cap at the actual input length
lengthsForChart.push(parseFloat(currentLength.toFixed(2)));
}
// Ensure the exact input length is included if it's not the last point
if (length > 0 && (lengthsForChart.length === 0 || lengthsForChart[lengthsForChart.length – 1] !== parseFloat(length.toFixed(2)))) {
lengthsForChart.push(parseFloat(length.toFixed(2)));
}
// Sort lengths to ensure chart progresses correctly
lengthsForChart.sort(function(a, b){return a – b});
// Recalculate weights for the sorted lengths
for (var i = 0; i 0 &&
!isNaN(parseFloat(wtInput.value)) && parseFloat(wtInput.value) > 0 &&
!isNaN(parseFloat(lengthInput.value)) && parseFloat(lengthInput.value) > 0) {
calculatePipeWeight();
}
}
});