Can welded steel pipes be used for compressed air pipelines?
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In the current design, it is a DN700 air duct made of 304 material, with a wall thickness of 7.92 mm. The design temperature is 60°C and the design pressure is 0.18 MPa； DN300 compressed air pipeline, material 304, wall thickness 9.53mm, design temperature 130°C, design pressure 1MPa. The manufacturer reported that the pipe diameter is too large and the wall thickness is too thin, making it difficult to produce seamless steel pipes. I would like to ask the experts here: can seamless steel pipes be replaced with welded steel pipes?
This pressure! Stainless steel should work!
Boss, your pipes are made of stainless steel. Is there a strict requirement for the purity of the air when using them to transport air? Stainless steel pipes of this specification are all seamless; it’s likely that pipes with seams of this type aren’t required. Everything should be carried out in accordance with the design requirements; where requirements exist, coordination and confirmation with the design agency are necessary. The design plan cannot be altered without permission. For reference.
The last edit to this post was made by The wind blows jb No messy hair on 2022-8-12 at 11:02. The DN300 pipes are fine too; they’re not very large, so there’s no problem in using them as seamless pipes. Moreover, it must be done according to the design; no changes are allowed without permission. Has the design institute given approval?
After coordination, the DN700 pipeline was changed to a welded type, while the DN300 remains seamless
The hot-dip galvanized pipes commonly used for instrument air lines in installations are seamless pipes