forged steel flange ring 1,material:alloy steel,carbon steel, stainless steel 2,professional UT 3,all kind of types Forged Flange ring Specification 1,Standard: ... ISO14000 and ISO180002,we can manufacture all kind of forged flange ring as per customer's requirement.3, inspection: ... Accepted 7, Professional engineers 8, Prompt Delivery (alloy steel,carbon steel ,stainess steel)forged flange ring