Shop from professional Pre-galvanized Steel Pipe manufacturers and suppliers for quality 200 x 200 tube square pipe astm a53 galvanized square and rectangular tube steel tube made in China here. The best service and fast delivery are offered. ASTM A53 - COSASTEELOct 21, 2020 · ASTM A 53 includes seamless and welded steel tubes. They are made by the following process:open-hearth furnace, electric furnace, or alkaline oxygen. The weld of class B resistance welded pipe shall be heat-treated after welding. ASTM A53 and ASTM A106 are commonly used as performance parameters for standard U.S. carbon steel materials.
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