I am tendering for a project and need to understand more about the standards laid out in the above BS. The tender specification calls for work to be carried out by welders which are coded to the above. However joints are to BS2971 - which I understand is a lower code ? Could someone offer some advice as to what is needed to meet the BS-EN287 and also if there are welders available who could price such work. Many thanks Extract from the tender specification: Pipework will be in heavy weight black steel, and have welded joints to BS 2971 Specification for Class II welding of carbon steel pipework for carrying fluids. Welders to be coded to BSEN 287 Part 1 (ISO9606). NB: All Welded joints to be MIG welded, and provided with welders unique mark adjacent each joint.