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Carbon steel pipe for general structural purposes (STK 400) KSD 3566 (SPS) / JISG 3444 (STK))
 Carbon steel pipes for pressure KS D 3562(SPPS) / JIS G 3454(STPG)
  ¡ØMiscellaneous spec can be customized by orders  
 ASTM A500 Structural carbon steel pipe