Bolt Tightening Sequence for Fittings (Supplier : Environmech Sdn Bhd) near by Sungai Lalang

Fittings: Bolt Tightening Sequence

  • Use only a 3mm thick, one-piece, 80 hardness synthetic rubber gasket to suit flange rating.
  • Hold gasket incorrect position on clean flange face until flanges meet.
  • Use only undamaged rust-free bolts, nuts, and washers.
  • Lubricate bolt threads and all mating surfaces of nuts, washers, and flanges using an automotive-grade of oil or grease.
  • Tighten the bolts in the sequence shown until full torque is achieved.
  • Check and, if necessary, re-tighten bolts immediately before pressure testing.
For sizes having 12 or more bolts, it is recommended that two jointers work simultaneously on diametrically opposed bolts tightening the first nut in the first quadrant then the first nut in the second quadrant returning to the second nut in the first quadrant, and so on.

It is important that a sufficient number of circuits are carried out to achieve the specified torque on every bolt.

Universal Coupling

Universal Flange Adaptor

For more information or enquiry, please contact Environmech Sdn. Bhd.
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