The HEJ is contains Single or Dual Expansion Joint and its can design to permit angular rotation and if UEJ than lateral movement in One plane only by using a pair of pins through hinge plate and its fix with end connection of expansion joint assembly. All the hinge pins and plate are design to restrain the thrust force due to internal pressure and extraneous force, wherever applicable. As per below photos.
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Kathwada, Ahmedabad, Gujarat