b ASTM A53 can be formed and welded. Specify the correct pipe size using the nominal pipe size (NPS). This is the nominal pipe diameter for specified wall thickness (i.e., 4 inch Schedule 40 pipe).

a53 galvanized pipe Executive standard: ASTM A53 welded steel pipe for low-pressure fluid transportation ASTM A53 straight seam electric welded steel pipe" Q/HBTC 001-2016 "welded steel pipe"

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