Size: 1/2"-80" Pressure: Class150/300/600/9001500/2500 Material: Carbon steel: A105, A105N Q235, 16Mn Stainless steel: A182 F304, A182 304L, A182 F316, A182 F316L, A182 F51 etc Standard: ANSI B16.5 Connection Type: Welding Technology: Forged Machine CNC Machinery Equipment Surface Treatment: usually Black painting for A105 carbon steel and Bare for Stainless steel. Suitable Medium: water, oil, petroleum, gas, chemical, power, metallurgy, shipbuilding, construction etc. Certificate: Mill test Certificate per EN10204/3.1 and EN10204 /3.2 is also available.