CONNECTION PART COVER, PRODUCTION METHOD OF THE SAME, CONNECTION SYSTEM, AND PROTECTION METHOD OF CONNECTION PART

To provide a connection part cover the heat-retaining property of which is high, and a wave-shaped cladding tube of which is less likely to come off from the connection part cover, to provide a production method of the same, and to provide a protection method of a connection part.SOLUTION: A connection part cover 1 for protecting a connection parts of inner tubes (61, 62) cladded by wave-shaped cladding tubes (71, 72) includes a pair of half-split cylindrical bodies (10A, 10B). A plurality of ribs extending in a circumferential direction at a pitch same as a pitch of valley parts of the wave-shaped cladding tubes are formed in inner surfaces of parts constituting cladding tube storage parts (20, 30) of the half-split cylindrical bodies. When the pair of half-split cylindrical bodies are in a closed state, the ribs of the pair of corresponding half-split cylindrical bodies are connected to make an annular shape, and are continuously engaged with the valley parts of the wave-shaped cladding tubes.SELECTED DRAWING: Figure 2 【課題】連結部の保温性が高く、連結部用カバーから波形被覆管が抜けにくい連結部用カバーとその製造方法、及び連結部の保護方法を提供する。【解決手段】波形被覆管（７１、７２）に被覆されている内管（６１、６２）の連結部を保護する連結部用カバー１であって、一対の半割円筒体（１０Ａ、１０Ｂ）を備え、各半割円筒体の被覆管収容部（２０、３０）を構成する部分の内面に、波形被覆管の谷部と同じピッチで各々周方向に延びる複数のリブを形成し、一対の半割円筒体を閉状態としたとき、対応する一対の半割円筒体のリブが連結して環状をなして波形被覆管の谷部に連続して係合するように構成する。【選択図】図２