weld neck flange: 1.Size:1/2"--60" 2.Standard:ANSI,ASME, ... ,DIN 3.Material:304,316,304L,316L,321 etc. weld neck flange:Details of the ProductHebei Hanghao High-pressure Flange Pipe ... customer’s requirements or normal deliveryAuthentification codeISO 9001:2008 weld neck flange