This is a Flange without a bore and is used to shut off a piping system or vessel opening. It also permits easy access to vessels or piping systems for inspection purposes. DIMENSION SPECIFICATIONS AS PER THE INTERNATIONAL STANDARD ASTM, ASME, API, AISI, BS, ANSI, DIN, JIS, MSSP, NACE SIZE : ½" to 60" (As Per Customer Requirement) CLASS : 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS DIN Standard ND-6,10, 16, 25, 40 Etc. MATERIAL GRADE : Carbon Steel Blind Flange : ASTM A105, ASTM A 694 F42 Low Temperature Carbon Steel Blind Flange : A350 LF2/A350 LF3 Copper Alloys Blind Flange : ASTM / ASME SB 61 / 62 / 151 / 152 C 70600 (CU -NI- 90/10) C 71500 (CU -NI- 70/30) UNS NO. C 92200, UNS NO. C 83600,UNS NO C 10100 C 10200, C 10300, C 10800, C 12000, C 12200 Nickel Alloys Blind Flange : Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22, C276 Duplex Blind Flange : ASTM A 182 UNS F 44, F 45, F51, F 53, F 55, F 60,F 61 Stainless Steel Blind Flange : ASTM 182 F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316TI, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L Alloy Steel Blind Flange : ASTM SA 182 F1/F5/F9/F11/F22/F91