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Threaded & Socket Welded Fittings - Pressure Classes and Schedules

Pressure classes, schedules and weights of pipes for threaded & socket welded fittings

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Pipe Schedule and Designation
Pressure Class2000300060009000
Threaded Fittings 80/XS 160 XXS  
Socket-welded Fittings   80/XS 160 XXS
  • Standard (STD), Extra Strong (XS) and Double Extra Strong (XXS)
  • Schedule - numbers assigned to different wall thickness of pipe (i.e. schedule 80)

Threaded fittings are available in pressure classes 2000, 3000 and 6000.

Socket-welded fittings are available in pressure classes 3000, 6000 and 9000.

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