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D1835-22 – Standard Test Method Technical Guide
ASTM D1835-22 is the standard specification for liquefied petroleum (LP) gases, covering propane, propene, butane, and their mixtures. It applies to products used for domestic, commercial, and industrial heating, as well as engine fuels. This standard provides four basic types to meet diverse application needs.
📐 Overview and Types
The standard defines four basic types of LP gases, each tailored for specific applications. These types include propane, propene (propylene), butane, and mixtures of these hydrocarbons. The classification ensures that the gases meet the requirements for domestic, commercial, and industrial heating, as well as engine fuel use.
⚙️ Test Methods and Specifications
Compliance with D1835-22 requires adherence to several ASTM test methods. These methods evaluate key properties such as vapor pressure, density, and corrosion potential. Table 1 below lists some of the referenced test methods and their corresponding properties.
| 🔬 Test Method | 📏 Property Measured |
|---|---|
| D1267 | Gauge Vapor Pressure |
| D1657 | Density or Relative Density |
| D1838 | Copper Strip Corrosion |
| D2158 | Residues in LP Gases |
| D2163 | Hydrocarbon Composition |
| D2420 | Hydrogen Sulfide Content |
📊 Key Measured Properties
The standard specifies limits for various properties to ensure product quality. Key properties include gauge vapor pressure, density, volatility, and sulfur content. For instance, vapor pressure is determined using Test Method D1267, while density is measured via D1657 or calculated from composition using Practice D2598. Table 2 provides an overview of the product types and their typical applications.
| 🟦 Product Type | 📏 Common Application |
|---|---|
| Propane | Domestic and industrial heating |
| Propene (Propylene) | Chemical feedstock and heating |
| Butane | Engine fuel and heating |
| Mixtures | Tailored heating and engine applications |
Note: Values stated in SI units are standard, except for footnote C in Table 1 where ‘psig’ is used due to its widespread use in North American industry.
Safety: This standard does not address all safety concerns. Users must establish appropriate safety, health, and environmental practices before use.
❓ Frequently Asked Questions
🔍 What is the scope of ASTM D1835-22?
ASTM D1835-22 covers liquefied petroleum gases such as propane, propene, butane, and their mixtures, intended for use as heating and engine fuels.
💡 What are the four basic types of LP gases?
The four basic types include propane, propene (propylene), butane, and mixtures of these materials, each suited for specific applications.
⚡ What test methods are referenced in the standard?
Key test methods include D1267 for vapor pressure, D1657 for density, D1838 for copper strip corrosion, and D2163 for hydrocarbon composition, among others.
📌 Why is the unit ‘psig’ used in the standard?
The non-SI unit ‘psig’ is used in footnote C of Table 1 because it is widely employed in the North American industry for pressure measurements.