a reelable mechanically lined pipe having at least a liner and an outer pipe , the outer pipe having an outer diameter , dh , with the mlp formed from a plurality of pipe joints having conjoining girth welds , wherein the ends of each pipe joint terminate with clad overlay welds having a length in the range l min = 100 mm and l max = 4d h , and wherein the liner thickness , t , is equal to or less than a value calculated by formula i as defined .