ANSI B16.47 Series A flanges suit large-diameter piping systems up to NPS 60 in classes 150 through 900. Sumitec offers weld-neck and blind variants in durable materials like carbon steel A105 and stainless 316 for oil, gas, and power uses
ANSI B16.47 Series A Flanges
ANSI B16.47 Series A flanges follow MSS SP-44 standards for nominal pipe sizes NPS 26 through 60, offering thicker profiles ideal for weld neck and blind configurations in high-pressure environments. These flanges ensure superior strength and interchangeability in pipeline systems, surpassing lighter Series B options based on API 605
Materials and Grades
Sumitec supplies ANSI B16.47 Series A flanges in carbon steel such as ASTM A105 and A350 LF2, alloy steels including F5, F11, F22, stainless steels like 304, 316, 321, duplex grades F51 and F53, plus nickel alloys such as Inconel 625 and Hastelloy C276 for corrosion resistance and high-temperature performance
Pressure Classes and Dimensions
Available across Class 150, 300, 400, 600, and 900 with raised face or ring-type joint facing; for example, Class 150 26-inch flanges measure 870 mm outside diameter, 68 mm thickness for both weld neck and blind, 24 bolt holes on 806 mm circle; 30-inch at 984 mm OD, 75 mm thick with 28 holes on 914 mm; 36-inch 1168 mm OD, 90 mm thick, 32 holes on 1086 mm circle.
Applications and Benefits
These flanges excel in oil and gas pipelines, refineries, power generation, chemical processing, and water systems where large diameters demand reliable sealing under pressure. Series A provides heavier duty over Series B for critical high-stress uses
How to Buy from Sumitec- ANSI B16.47 Series A Flanges Suppier USA
Request custom ANSI B16.47 Series A flanges with PMI testing, material traceability, and fast lead times—download full dimension PDFs or 3D models today. Contact for quotes on weld neck, blind, or specialized alloys.
Frequently Asked Questions
What distinguishes Series A from B? Series A uses MSS SP-44 for thicker, stronger builds. Available sizes? NPS 26-60. Classes offered? 150 to 900. Materials? Carbon, stainless, duplex, nickel alloys
