Gi Galvanized Mild Steel Tubes Electrical Resistance Welded (Erw) High Frequency Induction Welded (Hfw)/Hot Finished Welded (Hfw) Conforming To Is-1239 (Part-I)/1990 (Fifth Rev) With Amdt. O 1 To 5 Screwed At Both Ends As Per Is: 554/1985 Socketed At One End And Other End Protected With Plastic Thread Protector The Socket Conforming To Is-1239 (Part-Ii)/1992 (Fourth Rev) With Amdt No.1 In Random Lengt H Of 4 To 7 Mtrs G-I Pipe Shall Be Duly Isi Marked As Per Statutory Requirement Nominal Bored Dia Is 40 Mm Medium Grade Is 1239-68 Part- C Class [ Warranty Period: 30 Months After The Date Of Delivery ] ]