... quality flanges in all desired standards . All of are flanges are manufactured taking in to account ... , F6, F9, F7, F11, F12, F21, F22 Stainless Steel : 304,304H,304L,310,310 S,321,321H, 316Ti ... Pipe Size (NPS)Outside Dia of Flange 'O'Thickness of Flange 'C'Dia of Hub 'X'Length Through Hub ... NeckSlip on Socket WeldingLappedWeld Neck Socket WeldingDepth of Socket1/2''88.911.230.22615.74815. ...