When purchasing ball or butterfly valves, how to ensure flange standards match piping to avoid field installation failure?
• Confirm pipe flange standard: ASME B16.5 or EN 1092-1.
• Verify flange OD, bolt circle, bolt hole number and diameter.
• For butterfly valves, confirm wafer or lug type, face-to-face per ISO 5752.
• Class 150 and PN16 dimensions differ and are not interchangeable.
• Require supplier flange drawings and written confirmation of matching.
• Verify flange OD, bolt circle, bolt hole number and diameter.
• For butterfly valves, confirm wafer or lug type, face-to-face per ISO 5752.
• Class 150 and PN16 dimensions differ and are not interchangeable.
• Require supplier flange drawings and written confirmation of matching.