Bluestar International manufactures Threaded Type Standard Type Flanges. Bluestar International has received ISO 9001:2000 and 14001:2004 certifications. Bluestar International supplies instrumentation fittings and flanges. Threaded Type Standard Type Flanges are designated series B flanges in ASME B16.47. Threaded Type Standard Type Flanges are available in the face of flat face, raised face, tongue and groove, and ring joint. 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.