... 1/2''--24'',Butt Welding:26''--72'')3MaterialCarbon steel,Stainless steel,Alloy Steel4Material GradesA234 WPB,A106,A53,API 5L,A105 ... ,A182 F304HMTP316L,A358 etc5TechnicsPushing,Forged,Pressing,Cold Drawn,Casting,etc6ShapeEqual,Round,Reducing7ConnectionRF,FF,MF,FMF,SRF,8Wall ... Casing Tube 3. Boiler Pipe 4. Petroleunm and natural gas industry 5. Chemistry industry 6. Electric industry ANSI alloy steel ...