The best tips for curling synthetic hair include using a curling iron set to its lowest setting, if the hair can withstand it, or to use hot water to shape the curls. The heat from hot water can be used to mold synthetic hair into any shape, with the help of foam hair rollers.
Natural gas is one of the major combustion fuels used throughout the country. It is mainly used. to generate industrial and utility electric power, produce industrial process steam and heat, and heat. residential and commercial space. Natural gas consists of a high percentage of methane (generally above. 85 percent) and varying amounts of ethane, propane, butane, and inerts (typically nitrogen, carbon. dioxide, and helium). The average gross heating value of natural gas is approximately 1,020 British. thermal units per standard cubic foot (Btu/scf), usually varying from 950 to 1,050 Btu/scf.
If a mixture of gas and air contains less gas than is needed for ideal combustion, then it is referred to as a lean burn. The ideal combustion ration (complete combustion) for propane is 1 part propane (4%) to 24 parts of air (96%). Even at this ideal ration, combustion products, known as flue gases, still occur. However, under this scenario, those products are harmless carbon dioxide and water.