Joining of lined pipes

A method for joining plastic lined metal pipeline sections to form a plastic lined metal pipeline for carrying high pressure fluids and slurries, the method comprising:

• lining a metal pipeline section that has a meal flange at one end with a plastic liner such that some of the liner extends beyond the flange end of the pipeline section;
• electrofusion joining an annular plastic member onto the outside of the portion of plastic liner which extends beyond the flange end of the metal pipeline section;
• if the liner extends beyond the annular plastic member, trimming the liner to be substantially flush with the annular plastic member,
• performing the above steps on another pipeline section that has a metal flange at one end;
• positioning the plastic members of both lined pipeline sections substantially adjacent to each other and substantially in axial alignment with each other,
• securing a containment ring around both annular plastic members to restrain any outward movement of the plastic members when in use;
• and
• securing the annular metal flanges to each other such that the annular plastic members are compressed between the metal flanges.