Orifice Flanges

Orifice Flanges

Orifice Flanges Manufacturers, Exporters & Suppliers across the Globe.

446 Orifice Flanges, 347/347H Orifice Flanges, 321/321H Orifice Flanges, 317/317L Orifice Flanges, 316/316L Orifice Flanges, 310/310S Orifice Flanges, 04/304L Orifice Flanges.

Alloy Steel, Inconel Orifice Flanges, Copper Nickel Alloy, Carbon Steel, Duplex steel, Hastelloy, Titanium, Alloy 20, Monel & Stainless Steel.

The functions of an Orifice Flange is to provide access to a line for metering of gases or liquids. An Orifice Plate is clamped between a pair of flanges when installed in a line & the whole assembly is known as an orifice flange union. Jack-screws within the assembly facilitates the removal of the orifice plate. In the orifice plate, the metering device, consists of a thin plate with a concentric, square edge & circular hole in the center. Two different pressure tap-holes are drilled in each flange to measure pressure difference through the orifice.


Material of ConstructionStandard Grades
Stainless Steel Orifice Flanges ASTM A240, A182
201, 202, F 304, 304L, 304H, 309S, 309H, 310S, 310H, 316, 316Ti, 316H, 316L, 316LN, 317, 317L, 321, 321H, 347, 347H, 904L
Carbon Steel Orifice Flanges ASTM A105 Gr. F70,65,60,56,52,46,42
Alloy Steel Orifice Flanges ASTM A182 F91,F22,F11,F9,F5,F1
Nickel Alloy Orifice Flanges ASTM SB564, SB472, SB162, SB160    Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Nickel 200 (UNS No. N02200), Inconel 800 (UNS No. N08800), Alloy 20 (UNS No. N08020), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276)
Copper Alloys Orifice Flanges ASTM SB151, SB152, SB 61, SB62   UNS No. C 71500 (Cu-Ni 70/30), C 70600 (Cu-Ni 90/10), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200
Low Temperature Carbon Steel Orifice Flanges ASTM A350 LF3, LF2
Duplex Steel Orifice Flanges ASTM A240, A182
UNS F 61, F 60, F 55, F 53, F51, F 45, F 44