Bluestar International offers Welding Neck Standard Flanges. Bluestar International holds ISO 9001:2000 and 14001:2004 quality assurance certifications. Bluestar International supplies instrumentation fittings and flanges. Welding Neck Standard Flanges are available in the face of flat face, raised face, tongue and groove, and ring joint. Welding Neck Standard Flanges are designated series B flanges in ASME B16.47. The finish on the face of a flange is measured as an Arithmetical Average Roughness Height [AARH]. The finish is determined by the standard used.
