Pipe flanges that are made to standards called out by ASME B16.5 or ASME B16.47 are typically made from forged materials and have machined surfaces. B16.5 refers to nominal pipe sizes (NPS) from 1/2 to 24. B16.47 covers NPS from 26 to 60. Each specification further delineates flanges into classes 150, 300, 400, 600, 900, 1500 and 2500 for B16.5. B16.47 delineates its flanges into classes 75, 150, 300, 400, 600, 900. We can also produce JIS, DIN AWWA or special shape flanges.
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