| 摘要 |
A connection comprising first and second lined tubular members 101,102 having a coincident bore 113,114 and a protective ring 115, the first lined tubular member 101 having a pin end 2 and the second lined tubular member 101,102 having a box end 4, each lined tubular member 101,102 comprising a tubular body 3,5, an annular liner 103,104 and a mortar filled annulus 107,108 there between, characterised in that said cement filled annulus 107,108 has an annular recess 111,112 in at least one of the pin end 2 and box end 4 for receiving a part of the protective ring 115. The protective ring 115 may comprising flanges (fig 4, 118,119) with pointed distal ends (fig 4, 125, 126) to be received within grooves 111,112. Where in use the protective ring 115 reduces the flow of corrosive fluids to the mild steel of the tubular members 101, 102 while allowing for changes in dimensions due to temperature fluctuations. |
