工业管道维护法兰尺寸表和维修指南

2026-04-27
嬷嬷
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Flange Sizing and Repair Guide

Proper flange sizing and timely repair ensures safe pipeline operation.

Flange Sizing Chart

  • NPS 1/2 to NPS 24: Standard range
  • DN15 to DN600: Metric sizes
  • Class 150 to 2500: Pressure ratings
  • 可定制尺寸

Flange Repair Methods

  • Face resurfacing for minor damage
  • Bore machining for worn surfaces
  • Bolt hole repair and re-drilling
  • Weld overlay for severe wear

How to Replace Flange

  1. Isolate and drain pipeline
  2. Remove old bolts and gasket
  3. Clean mating surfaces
  4. Install new flange and gasket
  5. Torque bolts to specification
  6. Pressure test before service