CONDITION
|
POSSIBLE CAUSES
|
RECOMMENDATIONS
|
Missing or improper O-ring |
Assembly or re-assembly oversight |
Replace with proper O-ring and re-tighten connection using incremental alternating tightening procedure |
O-ring pinched or extrude |
Improper tightening procedure |
Replace O-ring and re-tighten connection using incremental alternating tightening procedure (See Flange Port Assembly) |
Evidence of yielded or cracked flange head, tube or hose end |
Mis-aligned tube or hose connection |
Re-bend or re-route hose/tube lines to eliminate misalignment |
Components do not mate or gap is too large |
Proprietary flange or pressure series matching problem |
Identify all components — most proprietary flanges use standard Code 61/62 bolt patterns and threads, but usually they are not interchangeable |
Port has severe scratches or nicks in seal area |
Mis-handling or abuse |
Resurface the port to remove scratches and nicks |
Clamp halves are bent |
Over-pressurization or over-torque |
Replace clamp halves and tighten to proper torque |
Bolts are bent |
Bolts are too weak or over-torqued |
Replace bolts with grade 5 or better; re-tighten to proper torque |