Piping issues in natural gas pipelines
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I have a DN100 natural gas pipeline. The natural gas company has placed the gas cylinder 17 meters to the west of my heat transfer oil furnace room. I would like to ask for advice on how to install this pipeline: 1. If it is to be buried, should a trench be dug or can it be buried directly? What material should be used for the pipeline – carbon steel, or the polyethylene pipes recommended by standards, or mechanically joined ductile iron pipes, etc.? 2. If it is to be installed above ground, a pipe rack will be needed; at what height should the natural gas pipeline be installed?
Gas pipelines are considered pressure pipelines. Gas pipelines are pressure transmission pipelines, whose medium is flammable, explosive, and toxic gases. After construction or maintenance, the pipes must undergo a gas-tightness test to ensure their safe operation.
Your question involves multiple aspects such as the general layout, materials, and the regulation of pressure pipelines
GB50028 sets out relevant specifications; or refer to other specifications for the layout of industrial pipelines.
17 meters, is this distance okay? The height of the pipe rack is generally around 3 meters; if it needs to cross a road, then 5 meters is required
Either PE pipes or carbon steel pipes can be used~~ However, carbon steel pipes buried underground need to have proper anti-corrosion measures in place. As for the choice between burying them or using pipe trenches, calculate the costs involved; try to save money wherever possible. If pipe trenches are used, the design can be carried out in accordance with HG or SH standards, depending on the conditions at your site~~
Don’t talk nonsense if you don’t understand; many gas cylinders are not considered pressure pipelines. According to the definition of pressure pipelines, only those with a diameter greater than 50 and a pressure greater than 0.1 are classified as such. It depends on his work pressure.
What we are installing are polyethylene pipes, which are then buried directly at a depth of 1.5 meters
From what you say, natural gas is used in heat transfer oil boilers; I personally recommend using seamless steel pipes. If it comes to pressure pipelines, it’s better to have a design company carry out the design work, and then have a qualified unit carry out the installation, with supervision and inspection by the local special equipment inspection agency.