The utility model provides a high pressure flange coils protector, including two semicircular protecting crusts, the junction between two semicircular protecting crusts is equipped with the hinge, theprotecting crust be equipped with the upper surface, the upper surface be equipped with the semicircular pipeline and reserve mouthful, the hinge fixed by movable pin, the protecting crust be 4mm's steel sheet and the reinforcing bar system of welding that the diameter is 5mm by thickness. The utility model discloses the ring flange junction thick liquid that splashes that can prevent to hole among the construction link such as sleeve pipe pressure testing, the slip casting reinforcement of shallow portion, slip casting, hole sealing leads to the fact the filthy and injury to personnel accident of job site health.