1) OD: up to 5,500mm 2) Standard: ASME, ANSI, API, JIS, JPI, DIN, UNI, BS, AS 3) Pressure Vessel Forging, Shaft Forging standard carbon steel ANSI flange1) TUV and ISO 9001 certificates2) DIN/ EN1092/ ANSI B16.5/ UN /BS 45043) DN10~~DN36004) Carbon/ forged steel /Stainless steel WN Flange5) 100% BELEC Spectrum testing6) Reasonable price and reliable quality