... Standard: ANSI, JIS, BS, DIN,UNI, EN, GB, AWWA, API, MSS, LWN, Orifice, 8-Figure flange4) Marking: Require5) Inspection: in ... -house and the third party6) Surface:Stain Direction / Mirror / Custom (SSS / ... market, we mainly sell products to customers in petroleum and gas fields.Following the principle of "Sincere Operation, Quality ...