Heat preservation jacket sleeve convenient to overhaul

The utility model discloses a heat preservation jacket sleeve convenient to overhaul, characterized by: form by pressing from both sides the cover outer tube and pressing from both sides the coaxial suit of cover inner tube, through sealing ring welded fastening and sealed, be formed with the cavity that supplies the heat preservation medium to flow between the two between the two, seted up the inner tube breach on pressing from both sides the cover inner tube, seted up the outer tube breach that the size is greater than the inner tube breach on pressing from both sides the cover outer tube, pipe breach department including the inner tube sealing of tube to wear out from the outer tube breach. The utility model provides a heat preservation jacket sleeve exposes branch pipe interface position in the sight, and can be very convenient observe the branch pipe kneck and whether have a leakage if it to take the repair welding measure fast to take place to leak, makes things convenient for the checksum maintenance,