supply of mild steel pipe of 25mm nominal bore, black, heavy grade, (hfs) with plain ends in standard lengths of 6 mtrs. to is : 1239, (part-1) - 2004 with amendments 1 to 5 - for coaching stock.mild steel pipe of 25mm nominal bore, black, heavy grade, (hfs) with plain ends in standard lengths of 6 mtrs. to is : 1239, (part-1) - 2004 with amendments 1 to 5 - for coaching stock.,mild steel pipe of 25mm nominal bore, black, heavy grade, (hfs) with plain ends in stan dard lengths of 6 mtrs. to is : 1239, (part-1) - 2004 with amendments 1 to 5 - for coaching stock. [ wa rranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]