Ethyne, oxygen, and inert gases are industrial gases with a wide range of uses. The oxygen-acetylene combination generates localised heat and is frequently employed in various heating applications. Acetylene and Oxygen have typical flammability properties that provide storage and handling issues. These gases are held in gas plants and cylinders before being delivered via piping and manifolds. The pipelines and manifolds have many components designed to specifications and meticulously manufactured utilising various materials. Material selection for pipelines and manifolds is a complicated procedure requiring various considerations. This article explains the considerations while constructing acetylene gas pipes.
Acetylene and Oxygen
Acetylene, also called Ethyne, has little moisture and is tasteless, colourless, and odourless. Oxygen is a highly reactive nonmetal and an oxidising agent. When combined with oxygen, the acetylene flame generates one of the hottest fuel gases. Acetylene should be kept under 15 PSIG of pressure. Due to its instability, this gas may disintegrate at high pressures and temperatures, causing an explosion or fire. The acetylene pipe must have a safety relief valve installed if the pressure is more than 9 PSIG. This valve must be built and installed, so the system pressure does not exceed 22 PSIG. Oxygen is used at temperatures of –22 °F and 400 °F and pressures at 21 MPa (3000 PSI).
Learn about the materials used in oxygen and acetylene gas piping.
For pipes or manifold piping and pipeline system installation, burn-resistant metals or metal alloys are suggested. The following are some of the most often used materials in acetylene and oxygen gas pipe.
A good choice for acetylene gas pipes is stainless steel or carbon steel. The construction of pressure gauges and fittings must also be steel. This is due to the explosive chemicals formed when acetylene gas combines with copper, silver, and mercury. Although copper alloys are occasionally used as acetylene gas pipelines, the copper concentration is normally kept below 65% to avoid difficulties.
Manifold piping systems or inert gas pipes are commonly constructed using brass, copper, and stainless steel. The ignition temperature and gas reactivity must be assessed before selecting these materials.
It is usually a good idea to consult an expert before installing gas transmission pipes. The appropriate content will be provided after they understand your application needs. Additionally, acetylene plants and gas manifolds should be invested to ensure quality.
Copper alloys and nickel-copper alloys are all considered while designing an oxygen pipe system. These materials are difficult to ignite, making them a preferred choice for oxygen gas pipes and pipelines. Stainless steel is discussed with copper and copper alloys. The burn resistance of this material is determined by elements such as equipment setup, oxygen purity, and metal thickness.
It is more effective to use acetylene for cutting than propane. However, the truth is that people are misusing gas for cutting, even though acetylene is hotter than propane. It is common for people to mistake propane for acetylene when cutting. Acetylene flames have less heat than propane warmup flames.
The stoichiometric oxygen requirements for propane are higher than those for acetylene. The volume of oxygen to fuel gas is 1,2 to 1 for acetylene and 4.3 to 1 for propane for the highest flame temperature in oxygen. Therefore, utilising propane results in a much higher oxygen consumption rate. Propane is less costly than Ethyne, although the greater oxygen consumption offsets this.