Issues with flat and beveled grooves of pipes in the pipe grade table
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As the title suggests, in some households, all the pipes listed in the pipe grade table are flat-ended, regardless of their diameter. For most pipes, the joints are butt-type for those under 50, bevel-type for those over 50; socket welding is used for pipes under 50, while butt welding is used for those over 50. There are also those where the end is flat for values below 50, but they use butt welding for connection. What’s going on here?
The selection of pipe joint types in the pipeline grade table is primarily based on factors such as pipe diameter, pressure rating, and operating environment. Flat ports are mainly used in small-diameter or low-pressure systems because they are easier to manufacture and install. For larger pipe diameters or higher pressure systems, grooves are typically used, as they provide better mechanical strength and sealing performance. Socket welding and butt welding are common welding methods; socket welding is suitable for smaller pipe diameters, while butt welding is appropriate for larger pipe diameters and high-pressure systems. Each company may choose different standards based on its specific needs and experience. .
Flat edges and beveled edges involve different ordering conditions and prices
Flat groove with a thickness of 2 mm or less, bevel groove with a thickness of 2 mm or less
I know all of what you mentioned, but it’s clear that you haven’t answered my core question: why do some companies use straight-thread pipe diameters ranging from 15 to 400 in their pipe grade tables.
There’s no answer to my core question
How exactly should it be said? What’s cheap?
Depending on the medium present and the operating conditions, as well as the material of the pipeline, it is not always the case that fitting connections are used for pressures ranging from 15 to 40, while welding is used for pressures above 50. For media that are prone to crevice corrosion, those that involve lubricants, oxygen, or require high levels of cleanliness, welding actually represents a better choice. I don’t know what the poster’s rank is like; it can probably be inferred from these aspects.