| 摘要 |
In order to reduce or remove the potential risk of heat damage in the absence of cooling jackets when joining lined pipe sections, each lined pipe section 3, 5 is provided with an insulatory sleeve 23, 25 which is disposed between the host pipe 7, 9 and the respective liner 11, 13. The sleeves 23, 25 do not extend the full length of the lined pipe sections, but are located in an end of the host pipes 7, 9. The pipes are welded together at their ends. The insulator sleeves 23, 25 can be first located in the ends of the host pipes 7, 9 then the carbon steel pipes lined by drawing the liners 11, 13 through via a reduction die to reduce their external diameter. When pulling tension on the liners 11, 13 is removed, the liners 11, 13 revert towards their original dimensions resulting in a tight fitting against the internal surface of the host pipes 7, 9, and a tight fit against the internal surface of the insulatory sleeves 23, 25 near the ends of the host pipes which holds them in place and, optionally, compresses the insulation material. |
