ID (mm) ID (inch) OD (inch) PLIES Working pressure (psi) (bar) 25 1 1-5/16 2 100 7 32 1-1/4 1-5/8 2 100 7 38 1-1/2 1-7/8 2 100 7 51 2 2-7/16 2 100 7 63 2-1/2 3 2 80 5.5 76 3 3-1/2 2 80 5.5 89 3-1/2 4 2 50 3.5 102 4 4-9/16 2 50 3.5