Blind pipe flanges are used to seal the end of a piping system or pressure vessel openings to prevent flow. Blind pipe flange are mainly used for pressure testing the flow of liquid or gas through a pipe or vessel. Blind pipe flanges also allow easy access to the pipe in the event that work must be done inside the line. Blind pipe flange are also used for high pressure applications.

Blind Flanges Product Range
Range
½" (15 NB) to 48" (1200NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. Available with NACE MR 01-75

Stainless Steel Blind Flanges
Grade : 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 L, 317, 317L, 321, 347, 347 H, 409, 410, 410S, 420, 430L

Duplex Steel Blind Flanges
Grade : 2205 (UNS No. S31803), 2507 (UNS No. S32750)

Nickel Alloy Blind Flanges
Grade : Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)

Copper Alloy Blind Flanges
Grade : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)

Variations:

Face finish : Raised face (RF) – Flat face (FF) – RTJ – -
Variations : Spectacle Blind

Standards:
ASTM A182 – ASME SA182 – `Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings`

ASME B16.5 – `Pipe Flanges and Flanged Fittings`
ASME B16.36 – `Orifice Flanges`
ASME B16.47 – `Large Diameter Steel Flanges NPS26 Through NPS60′

MSS SP-6 – `Standard Finishes for Contact Faces of Pipe Flanges and Connecting End Flanges of Valves and Fittings`

Dimensions

Diameter : 1/2" à 24"

Pressure class : 150# – 300# – 600# – 1500#