1. What is the Gas Specific Gravity To Density Formula?

The Gas Specific Gravity To Density formula calculates the density of a gas based on its specific gravity relative to air. Specific gravity is the ratio of the density of a gas to the density of air at standard conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( density \) — Gas density (kg/m³)
• \( SG \) — Specific gravity (unitless)
• \( density_{air} \) — Air density at standard conditions (1.225 kg/m³)

Explanation: The formula multiplies the specific gravity of the gas by the standard density of air to obtain the actual density of the gas.

3. Importance of Density Calculation

Details: Gas density calculations are essential in various engineering applications, including flow measurement, pipeline design, combustion calculations, and process optimization in oil and gas industries.

4. Using the Calculator

Tips: Enter the specific gravity value (unitless). The value must be greater than 0. The calculator uses the standard air density of 1.225 kg/m³ at standard conditions (15°C and 1 atm).

5. Frequently Asked Questions (FAQ)

Q1: What is specific gravity of a gas?
A: Specific gravity is the ratio of the density of a gas to the density of dry air at standard conditions of temperature and pressure.

Q2: Why use 1.225 kg/m³ as air density?
A: This is the standard density of dry air at 15°C (59°F) and 1 atmosphere pressure, which are commonly used standard conditions.

Q3: How does temperature affect gas density?
A: Gas density decreases with increasing temperature and increases with decreasing temperature, following the ideal gas law.

Q4: What are typical specific gravity values for common gases?
A: Natural gas: 0.55-0.70, Propane: 1.52, Butane: 2.00, Hydrogen: 0.07, Carbon dioxide: 1.52.

Q5: When is this calculation most useful?
A: This calculation is particularly useful in pipeline flow calculations, gas measurement, compressor design, and any application where gas density affects system performance.