Can flat-weld flanges be used for gasoline and diesel pipelines?
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Petroleum refinery gasoline and diesel pipelines, with a design pressure of 1.0 MPa and a design temperature of 70°C. The American standard system is adopted, while Sinopec standards are used for flanges. May I ask: Can diesel and gasoline pipelines be connected using SO-type necked flat welding flanges?
Given that your design involves low pressure and temperature, I think using a flat welding flange with a neck is sufficient.
The temperature isn’t high and the pressure isn’t great; it’s completely fine.
It’s completely possible, but be careful of the corrosiveness of gasoline and diesel
Although it can be used without any problems, since this pipeline is a pressure pipeline, according to the relevant design specifications, raised-face welding flanges should be used. In petrochemical enterprises, except for the pipelines of utility systems which can use flat welding flanges, all other pipelines should use butt welding flanges.
Gasoline is a flammable and explosive substance, while diesel is a flammable substance; it is best to use PN2.0 butt-welded flanges.
Go back to floor 5. “Although it can be used and no problems will arise, since this pipeline is a pressure pipeline, according to the relevant design specifications, raised-face welding flanges should be used.” In petrochemical enterprises, except for the pipelines of utility systems which can use flat welding flanges, all other pipelines should use butt welding flanges. Since this pipeline is a pressure pipeline, according to the relevant design specifications, raised-face welding flanges should be used – can the relevant design specifications be provided?
There’s no problem at all; choosing Sinopec SH3406-96 with a pn2.0 rating and a butt weld design is more than sufficient – after all, Sinopec’s standards are slightly higher than those used in the chemical industry
It can be used just fine, but the petrochemical industry currently recommends the use of butt-welded flanges with a specific diameter