malleable cast iron pipe fittings sockets isi marked to is 1879 2010 with latest amndt galva nised table no of iss 6 1 designation m 2 sizes 1 2 warranty period 30 months after the date of delive ry quantity tolerance 5 age item category normal total po value variation permitted max 8 lacs malleable cast iron pipe fittings sockets isi marked to is 1879 2010 with latest amndt galva nised table no of iss 6 1 designation m 2 sizes 1 2 warranty period 30