procurement of 450nb and 300nb sleeve type expansion joint (modified coupling device) for wet and dry ash conveying lines of 2x660 mw, sstpp, mppgcl, dongalia. , 450 nb sleeve type expansion joint & gasket , 450nb sleeve type expansion joint (modified coupling device) for ash disposal line along with specially formulated (developed) rubber gasket. technical specification: size – 450nb medium – wet pressure – up to 30 kg/cm2 operating temperature – up to 60deg. cent. compensation range -+/- 100mm material – m/s medium carbon steel. end connection – welded. maximum slurry concentration – 30% pipes specifications – as per is: 3589 sleeve thickness -13mm , specially formulated (developed) rubber gasket suitable for 450nb sleeve type expansion joint) for ash disposal line. technical specification: shore hardness-65/70+/-5 shore a tensile strength-105 kg/cm2 +/- 5kg/cm2 elongation at break – 390%+/-50% specific gravity – 09250+/-0.1 , 300 nb sleeve type expansion joint & gasket , 300nb sleeve type expansion joint (modified coupling device) for dry fly ash conveying line along with specially formulated (developed) rubber gasket. technical specification: size – 300nb, medium – dry ash, pressure – up to 10 kg/cm2 operating temperature – up to 100deg. cent. compensation range -+/- 100mm material – m/s medium carbon steel. end connection – welded. pipes specifications – as per is: 3589 sleeve thickness & hardness-13mm & 114-135bhn reducer hardness-114-135bhn , specially formulated (developed) rubber gasket suitable for 300nb sleeve type expansion joint) for ash disposal line. technical specification: shore hardness-65/70+/-5 shore a tensile strength-105 kg/cm2 +/- 5kg/cm2 elongation at break – 390%+/-50% specific gravity – 09250+/-0.1