bids are invited for compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 2500 rating for the burst pressure 164 kgf per cm2 g at 323oc , compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 2500 rating for the burst pressure 175 kgf per cm2 g at 323oc , compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 1500 rating for the burst pressure 78 kgf per cm2 g at 280oc , compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 1500 rating for the burst pressure 85 kgf per cm2 g at 280oc , compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 1500 rating for the burst pressure 84 kgf per cm2 g at 285oc , compression loaded reverse buckling rupture disks, pre torque safety heads along with accessories of size 1 and half inches nb of 1500 rating for the burst pressure 90 kgf per cm2 g at 285oc total quantity : 8