API 6A Type 6B Weld Neck Flange Manufacturer: API 6A Welded Neck Flanges, ASTM A105N, API 6A Type 6B, 3-1/8 Inch, 3000 PSI, RTJ, 12.7mm Inside Diameter.
ASTM A105N Weld Neck Flange Supplier: ASTM A105N Welding Neck Flanges, 3-1/8 Inch, 2000 PSI, ASTM A105N, Inside Diameter 12.7mm, API 6A Type 6B.