supply of check valve , supply of items as per following specifications , swing type carbon steel supply of check valve with flanged end . size: 2x300# . moc: 1 . body: astm a216 gr . wcb 2 . top cover: astm a216 gr . wcb 3 . disc: astm a 217 ca15 / 13% cr facing on wcb 4 . seat ring: astm a 217 ca15 / a 515 gr . 70 with 13% cr facing . 5 . hinge pin & split pin: aisi 410 6 . bolt/stud: astm a 193 b7 7 . nut : astm a 194 2h note: 1 . valve shall be designed & manufactured as per api 6d /bs 1868 . 2 . face to face distance of flanged end shall be as per asme b 16 . 10 . 3 . end flange dimensions shall be as per asme b16 . 5 . 4 . valve shall be tested as per api 598 . 5 . party shall submit the material test certificate along with material supply . 6 . party shall submit the hydro test certificate along with material supply . 7 . party shall give the guarantee for material and workmanship of valve for 12 months from the date of installation or 18 months from the date of supply , whichever is earlier . , supply of check valve 3 150# , end connections 150# rf flange as per ansi b 16 . 5 , type: swing supply of check valve , material: body and cover astm a 216 wcb , cove r stud/ nuts: a193 b7/ a194 2h , hinge pin aisi 410/ a 182 f6 , disc & bo dy seat , ring: a217 ca-15 or a216 wcb+13% cr facing , design as per bs 18 68 testing as per api 598/bs 5146 , face to face asper ansi b 16 . 10