Flange Jointing Procedure for Ductile Iron Pipe Fittings is explained here.
Easy jointing Procedure for Flange Pipes:
- Clean the faces of the flanges for any dirt or particles of foreign matter.
- Inspect the gasket for any damage or manufacturing defect.
- Align the pipe properly and position the gasket between the flanges.
- Keep the gap between the flanges approximately uniform while tightening.
- First tighten four location bolts 1,2,3,4 as per diagram in order to roughly secure the adjoining flange.
- Check alignment of flange faces and gasket before tightening.
- Tighten nuts to finger tight.
- Insert remaining bolts or remove tighten nuts to finger tight.
- Remaining Bolts should be tightened in the correct sequence and to the appropriate torque.
- Finish with one final pas by providing torque in a clockwise direction.
- Tighten to 100% of estimated torque using the same sequence
