supply of isi marked galvanised mild steel tubes with isi marked socket ( g.i. pipe ) , isi marked galvanised mild steel tubes with isi marked socket ( g.i. pipe ) , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 15 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 20 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 25 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 32 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 40 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 50 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 65 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 80 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 100 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 125 mm nb , medium class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs length, is; 1239 ( part-1 ) 2004 with uptodate amendment with isi marked socket / socketed on one end and the other end protected with a plastic thread protector. size:- 150 mm nb , 3mtr. long riser pipe medium class: isi marked galvanised mild steel tubes is: 1239 ( part-1 ) 2004 with uptodate amendment with isi marked seamles socket. socketed on one end and other end protected with plastic thread protector. size-32mm nb , 3 mtr. long riser pipe medium class: isi marked galvanised mild steel tubes is: 1239 ( part-1 ) 2004 with upto date amendments with isi marked seamless socket. socketed on one end and other end protected with plastic thread protector. size-65mm nb , heavy class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs. long is: 1239 ( part-1 ) 2004 with upto date ammendments. with isi marked socket / socketed on one end and other end protected with plastic thread protector.size: 50 mm nb , heavy class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs. length is: 1239 ( part-i ) 2004 with upto date ammendments. with isi marked socket / socketed on one end and other end protected with plastic thread protector size: 65 mm nb , heavy class: isi marked galvanised mild steel tubes, erw / hfiw / hfw type screwed, 4 to 7 mtrs. length is: 1239 ( part-1 ) 2004 with upto date ammendments. with isi marked socket / socketed on one end and other end protected with plastic thread protector size: 80 mm nb