.ci-calculator-container {
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
max-width: 600px;
margin: 20px auto;
padding: 25px;
background: #f8f9fa;
border-radius: 12px;
box-shadow: 0 4px 15px rgba(0,0,0,0.1);
border: 1px solid #e9ecef;
}
.ci-calculator-container h2 {
margin-top: 0;
color: #2c3e50;
text-align: center;
font-size: 24px;
margin-bottom: 20px;
}
.ci-input-group {
margin-bottom: 20px;
}
.ci-input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: #495057;
}
.ci-input-group input, .ci-input-group select {
width: 100%;
padding: 12px;
border: 2px solid #ced4da;
border-radius: 6px;
font-size: 16px;
box-sizing: border-box;
transition: border-color 0.3s;
}
.ci-input-group input:focus {
border-color: #007bff;
outline: none;
}
.ci-btn {
width: 100%;
padding: 14px;
background-color: #007bff;
color: white;
border: none;
border-radius: 6px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.2s;
}
.ci-btn:hover {
background-color: #0056b3;
}
.ci-result-box {
margin-top: 25px;
background: #fff;
padding: 20px;
border-radius: 8px;
border-left: 5px solid #28a745;
display: none;
box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.ci-result-title {
font-size: 14px;
text-transform: uppercase;
letter-spacing: 1px;
color: #6c757d;
margin-bottom: 10px;
}
.ci-result-value {
font-size: 32px;
font-weight: 800;
color: #28a745;
margin-bottom: 5px;
}
.ci-result-sub {
font-size: 14px;
color: #6c757d;
}
.ci-article {
margin-top: 40px;
line-height: 1.6;
color: #333;
}
.ci-article h3 {
color: #2c3e50;
margin-top: 25px;
}
.ci-article p {
margin-bottom: 15px;
}
.ci-article ul {
padding-left: 20px;
}
.ci-article li {
margin-bottom: 8px;
}
.error-msg {
color: #dc3545;
font-size: 14px;
margin-top: 5px;
display: none;
}
Please enter valid positive numbers for flow and dosage.
function calculateCIRate() {
var flowRateInput = document.getElementById('flowRate');
var ppmInput = document.getElementById('targetPPM');
var resultBox = document.getElementById('resultBox');
var resultGPD = document.getElementById('resultGPD');
var resultLPD = document.getElementById('resultLPD');
var errorDisplay = document.getElementById('errorDisplay');
var bpd = parseFloat(flowRateInput.value);
var ppm = parseFloat(ppmInput.value);
// Validation
if (isNaN(bpd) || isNaN(ppm) || bpd < 0 || ppm < 0) {
errorDisplay.style.display = 'block';
resultBox.style.display = 'none';
return;
}
errorDisplay.style.display = 'none';
// Constants
var GALLONS_PER_BARREL = 42;
var LITERS_PER_GALLON = 3.78541;
// Calculation Logic
// Volume of Chemical (Gallons) = (Volume Fluid (Barrels) * 42) * (PPM / 1,000,000)
var totalFluidGallons = bpd * GALLONS_PER_BARREL;
var chemicalRatio = ppm / 1000000;
var injectionRateGPD = totalFluidGallons * chemicalRatio;
var injectionRateLPD = injectionRateGPD * LITERS_PER_GALLON;
// Display Results
resultGPD.innerHTML = injectionRateGPD.toFixed(2) + '
';
resultLPD.innerHTML = injectionRateLPD.toFixed(2) + ' Liters per day';
resultBox.style.display = 'block';
}
About the Chemical Injection (CI) Rate
The Chemical Injection (CI) Rate is a critical operating parameter in the oil and gas, water treatment, and petrochemical industries. It determines the precise volume of specialized chemicals—such as corrosion inhibitors, scale inhibitors, biocides, or demulsifiers—that must be injected into a process stream to achieve a desired concentration.
Correctly calculating the CI rate ensures asset integrity by preventing corrosion and scaling while optimizing operational costs. Under-injection can lead to catastrophic equipment failure, while over-injection results in unnecessary chemical expenditure and potential downstream process issues.
How to Calculate Injection Rate
The fundamental logic behind calculating the chemical injection rate is based on the volume ratio between the process fluid and the chemical, defined by the target Parts Per Million (PPM).
The Formula:
To calculate the rate in Gallons Per Day (GPD) based on a production flow in Barrels Per Day (BPD):
GPD = (BPD × 42 × PPM) / 1,000,000
- BPD: Barrels of fluid (water/oil) produced per day.
- 42: Conversion factor (1 Barrel = 42 US Gallons).
- PPM: Desired concentration (Parts Per Million).
- 1,000,000: The factor to convert whole units to PPM parts.
Common Applications
- Corrosion Inhibition: Protecting pipelines from rust and degradation caused by water and CO2.
- Scale Inhibition: Preventing mineral deposits (calcium carbonate, barium sulfate) that block flow.
- Biocides: Controlling bacterial growth in water injection systems to prevent souring and plugging.
- Demulsifiers: Assisting in the separation of crude oil from water.
This calculator assumes the chemical is supplied at 100% activity or that the PPM recommendation accounts for the solution strength. If using a diluted chemical, the injection rate must be increased proportionally to deliver the same active ingredient mass.