Steel pipe standards: Patterned tube for passenger vehicle handrails, Corten steel tube for air preheaters (GB/T 13793-2008), Seamless steel tube for structural use (GB/8162-2008), Seamless steel tube for conveying fluids (GB/8163-2008), Seamless steel tube for low and medium pressure boilers (GB/T 3087-2008), Seamless steel tube for high pressure boilers (GB/5310-2008), Seamless steel tube (GB/6479-2000), Seamless steel tube for petroleum cracking (GB/9948-2006), Seamless steel tube for automotive half-axle sleeve (GB/T 5035-1996).

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