A thermally insulated pipe junction comprising a first pipe having a male joinable end and a second pipe having a female joinable end, the first pipe comprising: a first outer pipe wall; a first inner pipe wall substantially parallel to the outer pipe wall and configured to contain a fluid within the pipe; the first inner pipe wall comprising a first body portion and a first connection portion extending therefrom; a first thermal insulation layer provided between the first outer pipe wall and the first body portion; the male joinable end comprising: the first connection portion which terminates in a first connection component, and a transition region where the first outer pipe wall tapers inwardly to meet the first connection portion of the inner pipe wall; and the second pipe comprising: a second outer pipe wall; a second inner pipe wall substantially parallel to the second outer pipe wall and configured to contain a fluid within the pipe; the second inner pipe wall comprising a second body portion and a second connection portion extending therefrom; a second thermal insulation layer provided between the second outer pipe wall and the second body portion; the female joinable end comprising: the second connection portion which terminates in a second connection component engaging the first connection component, and an intermediate surface connecting the second inner pipe wall to the second outer pipe wall such that both the second outer pipe wall and the intermediate surface extend over the second connection component; wherein, the intermediate surface extends over at least a part of the first connection portion and characterised in that: any of the outer pipe wall of the transition region extending within the intermediate surface is tapered continuously up to the first connection portion. a first outer pipe wall; a first inner pipe wall substantially parallel to the outer pipe wall and configured to contain a fluid within the pipe; the first inner pipe wall comprising a first body portion and a first connection portion extending therefrom; a first thermal insulation layer provided between the first outer pipe wall and the first body portion; the male joinable end comprising: the first connection portion which terminates in a first connection component, and a transition region where the first outer pipe wall tapers inwardly to meet the first connection portion of the inner pipe wall; the first connection portion which terminates in a first connection component, and a transition region where the first outer pipe wall tapers inwardly to meet the first connection portion of the inner pipe wall; a second outer pipe wall; a second inner pipe wall substantially parallel to the second outer pipe wall and configured to contain a fluid within the pipe; the second inner pipe wall comprising a second body portion and a second connection portion extending therefrom; a second thermal insulation layer provided between the second outer pipe wall and the second body portion; the female joinable end comprising: the second connection portion which terminates in a second connection component engaging the first connection component, and an intermediate surface connecting the second inner pipe wall to the second outer pipe wall such that both the second outer pipe wall and the intermediate surface extend over the second connection component; the second connection portion which terminates in a second connection component engaging the first connection component, and an intermediate surface connecting the second inner pipe wall to the second outer pipe wall such that both the second outer pipe wall and the intermediate surface extend over the second connection component; wherein, the intermediate surface extends over at least a part of the first connection portion and