[Class : 6] Metal Pipes Included In Class 6; Stainless Steel Pipes And Tubes; Elbows Of Metal For Pipes; Branching Pipes Of Metal; Metal Pipe Fittings; Rosettes Being Metal Pipe Fittings; Pipe Fittings [Junctions] Of Metal; Metal Fittings For Rigid Pipes; Metal Fittings For Compressed Air Lines, Metal Fittings For Flexible Pipes.