1. Natural gas cannot use high pressure valves. Pressurization is risky and changes need to be cautious.
2. High-pressure valve: refers to the valve whose working pressure PN is 10~80Mpa.
3. Natural gas refers to all natural gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere (including oilfield gas, gas field gas, mud volcanic gas, coalbed methane, and bio-generated gas, etc.) . The long-established definition of "natural gas" is a narrow definition from the energy point of view, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally present in the formation. In petroleum geology, it usually refers to oil field gas and gas field gas. Its composition is dominated by hydrocarbons and contains non-hydrocarbon gases.
