Orifice Flange

What is an orifice flange?

Orifice flanges are used with orifice meters for the purpose of measuring the flow rate of either liquids or gases in the respective pipeline.There are three types orifice flanges according to their connecting type:welding neck orifice flange,slip on orifice flange and threaded orifice flange.The traditional orifice flange assembly consists of a pair of flanges, orifice plate, bolts, nuts, gaskets, jacking screws and plugs. Jacking screws ensure the easy removal of the primary flow element.

ANSI ASME B16.36 welding neck orifice flanges

They are similar almost in every aspect to each respective flanges,the only difference is that orifice flanges have holes in each side of the flange perpendicular to the bolt holes.These holes act as instrumentation outlets for such things as pressure gauges,flow speedometers ect,and that can be threaded or socket in a variety of sizes.Another smaller holes is made among the bolt hole pattern to accommodate a jack screw to assist in separating the flanges after installation or for other inspection services.

The sealing face of the orifice flange could be Raised Face(RF) or Ring Type Joing (RTJ).

Specifications of orifice flange:

Size: 1″-24″

Haihao Group can provide a variety orifice flange,as follows:

• ANSI/ASME B16.36 class 300 welding neck RF orifice flange
• ANSI/ASME B16.36 class 300 welding neck RTJ orifice flange
• ANSI/ASME B16.36 class 300 slip on orifice flange
• ANSI/ASME B16.36 class 300 threaded orifice flange
• ANSI/ASME B16.36 class 400 welding neck RF orifice flange
• ANSI/ASME B16.36 class 400 welding neck RTJ orifice flange
• ANSI/ASME B16.36 class 600 welding neck RF orifice flange
• ANSI/ASME B16.36 class 600 welding neck RTJ orifice flange
• ANSI/ASME B16.36 class 900 welding neck RF orifice flange
• ANSI/ASME B16.36 class 900 welding neck RTJ orifice flange
• ANSI/ASME B16.36 class 1500 welding neck RF orifice flange
• ANSI/ASME B16.36 class 1500 welding neck RTJ orifice flange
• ANSI/ASME B16.36 class 2500 welding neck RF orifice flange
• ANSI/ASME B16.36 class 2500 welding neck RTJ orifice flange

Materials of orifice flange:

Haihao Group manufacture orifice flanges with various materials,such as carbon steel,stainless steel and alloy steel.

Carbon steel orifice flange:

• ASTM A105 orifice flange
• ASTM A350 LF2 orifice flange
• SS400 orifice flange
• P235GH orifice flange
• P250GH orifice flange
• C22.8 orifice flange
• Q235 orifice flange

Stainless steel orifice flange:

• ASTM A182 F304 orifice flange
• ASTM A182 F304L orifice flange
• ASTM A182 F316 orifice flange
• ASTM A182 F316L orifice flange
• ASTM A182 F321 orifice flange
• ASTM A182 F347 orifice flange

Alloy steel orifice flange:

• ASTM A694 F42 orifice flange
• ASTM A694 F46 orifice flange
• ASTM A694 F52 orifice flange
• ASTM A694 F56 orifice flange
• ASTM A694 F60 orifice flange
• ASTM A694 F65 orifice flange
• ASTM A694 F70 orifice flange
• ASTM A182 F5 orifice flange
• ASTM A182 F9 orifice flange
• ASTM A182 F11 orifice flange
• ASTM A182 F12 orifice flange
• ASTM A182 F22 orifice flange
• ASTM A182 F91 orifice flange

Haihao Group is committed to providing high quality flanges and service with on–time shipments to customer. Our products are mainly for Petroleum, natural gas, petrochemical, shipbuilding, Power generation, pulp and paper industries.Haihao Group is produced strictly in accordance with the international standard of ASME/ANSI,BS,DIN,EN,JIS,GOST,UNI,ISO and specifications.We do many specials and will help you design and specify the flange that best fits your needs.Email:sales@haihaogroup.com