... 3.Use:water supply,chemical,petroleum industry 1.NameStainless steel welding neck flange2.Standard:GB14976-2002, GB13296-2007, JIS, AISI, DIN, ... Or NotNon-secondary10.Alloy Or Not :Non-alloy11.Technique:Forged or casting12.Certification:ISO,QMS,DNV,KR,ABS,TUV,Lloyd ... Applicaton: Ships, petrochemical, medical equipment, piping installation link Stainless Steel Welding Neck Flange-Pipe connecting parts