carbon steel with Low Price welding neck flange: 1. Dimension: 1/2"to 72" 2. Material: Carbon steel 3.Reasonable Price Carbon steel with Low Price welding neck flange :Welding Neck Flange's Specification:1.Dimension:from 1/2" to 72"2.Thickness: STD, SCH20, SCH30, SCH40, SCH80, SCH100, SCH120, SCH160, XS, XXS3.Material: Carbon steel. Alloy Steel4.Standard: ANSI B16.5, DIN, JIS, GB5..Certificate: ...