Forged WN/SO/BL Flange Factory

Forged WN/SO/BL Flange  . Bangdong can manufacturer Forged WN/SO/BL Flange  , Carbon steel Pipe Flange , Alloy steel flange , stainless steel flange . A182 Slip On Flanges , A182 Blind flanges etc .  Our flanges are in high quality and well marking , if you have special logos , our technician also can mark it perfectly on the products . 

Flanges usually do MT test  , Dimension test etc .   Please kindly contact freely , will send related test reports for your reference. 

ASME/ANSI B16.5 flange provides
Weld Neck Flange
Slip On Weld Flange
socket weld Flange
threaded Flange
lap joint Flange
Blind Flange

More Details of Bangdong Flanges

There are many different flange standards to be found worldwide. To allow easy functionality and interchangeability, these are designed to have standardised dimensions. Common world standards include ASME (USA), DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean).

Pipe flanges that are made to standards called out by ASME B16.5 or ASME B16.47, and MSS SP-44. They are typically made from forged materials and have machined surfaces. ASME B16.5 refers to nominal pipe sizes (NPS) from ½" to 24". B16.47 covers NPSs from 26" to 60". Each specification further delineates flanges into pressure classes: 150, 300, 400, 600, 900, 1500 and 2500 for B16.5, and B16.47 delineates its flanges into pressure classes 75, 150, 300, 400, 600, 900. However these classes do not correspond to maximum pressures in psi. Instead, the maximum pressure depends on the material of the flange and the temperature. For example, the maximum pressure for a Class 150 flange is 285 psi, and for a Class 300 Flange it is 740 psi (both are for ASTM A105 Carbon Steel and temperatures below 100F).

Flange dimensions are determined by the pipe size and the pressure class required for the application. Flanges are standardized according publications from organizations like ASME, MSS, API and others.

Bangdong is one of the leading manufacturers and exporters of Steel Flanges. Our proficient and skilled team is specialized in manufacturing durable range of Steel Flanges which are available at reasonable rates. Steel Flanges manufactured at our unit using superior quality steel. The Steel Flanges are popular for their rust resistance and robustness. Steel Flanges for the clientele are made available in regular and custom-made specification. Hence we are one of the highly sought after Steel Flanges manufacturer in China.

» ASME/ANSI B16.5 :
WELDING NECK FLANGE, SLIP-ON FLANGE, BLIND FLANGE,HIGH HUB BLIND FLANGE, SOCKET WELD FLANGE, LAP JOINT FLANGE, THREADED FLANGE, RING TYPE JOINT FLANGE.
Pressure Class : 150, 300, 400 , 600 , 900, 1500 , 2500

» ASME/ANSI B16.47 :
WELDING NECK FLANGE, BLIND FLANGE. (SERIES A & B) 
Pressure Class : 75, 150, 300, 400 , 600 , 900

» ASME/ANSI B16.36 : 
(ORIFICE FLANGES) WELDING NECK FLANGE, SLIPON FLANGE, THREADED FLANGE. 
Pressure Class : 300, 400 , 600 , 900, 1500 , 2500

» ASTM/ANSI B16.48:( Figure-8 blanks) :

Pressure Class : 150, 300, 400 , 600 , 900,1500, 2500

» MSS SP44 : 
WELDING NECK FLANGE, BLIND FLANGE.
Pressure Class :300, 400 , 600 , 900

» API 6A : 
WELDING NECK FLANGE, THREAD FLANGE,BLIND FLANGE.
Pressure : 2000Psi, 3000Psi, 5000Psi, 10000Psi, 15000Psi, 20000Psi, 25000Psi

» Material :
ASTM A105; ASTM A350, A694 F42/F46/F52/F60/F65
ASTM A182 F304/304L,F316/316L, F321, F310,
ASTM A 182 F51/F53/F55

Flange Details

Welding Neck Flange

Weld neck pipe flanges attach to the pipe by welding the pipe to the neck of the pipe flange. This allows for the transfer of stress from the weld neck pipe flanges to the pipe itself. This also reduces high stress concentration at the base of the hub of the weld neck pipe flanges. Weld neck pipe flanges are often used for high pressure applications.

Threaded (Screwed) Flange

Screwed or Threaded flanges are attached to the pipe like any other screwed fittings, and may be back-welded to seal the joint between pipe and flange. Although still available in most sizes and pressure ratings, screwed fittings today are used almost exclusively in smaller pipe sizes and at low pressures.

Slip-On Flange

Slip on pipe flanges actually slip over the pipe. These pipe flanges are typically machined with an inside diameter slightly larger than the outside diameter of the pipe. Slip on pipe flanges are secured to the pipe with a fillet weld at the top and the bottom of the slip on pipe flanges.

Compact Flange

A compact flange, similar to a swivel ring flange, is a two-piece constructed flange used extensively for offshore pipelines, offshore industry applications and onshore and sub-sea applications. Its double sealing action prevents hydrocarbon releases to address health and safety issues and concerns.

Spectacle Blind Flange

A spectacle blind is a safety device used to isolate a section of line or piece of equipment when the line or equipment needs to be inspected or removed from service. It is different than a valve in that the blind is a permanent or long term isolation device.

Orifice Flange

An Orifice Flange is intended for use instead of standard pipe Flanges when an orifice plate or flow nozzle must be installed. Pairs of pressure tapings are machined into the Orifice Flange, making separate orifice carriers or tapings in the pipe wall unnecessary.

Socket Welding Flange

Socket Welding flanges have counter bore is slightly larger than the Outer Diameter of the matching pipe, allowing the pipe to be inserted. A restriction is built into the bottom of the bore, which acts as a shoulder for the pipe to rest on, and has the same ID of matching pipe.

Lap Joint Flange

A Lap Joint Flange is usually used in conjunction with Lap Joint Stubs. Lap Joint Flanges in carbon or low alloy steel piping systems are best used when frequent dismantling for inspection and cleaning is required. The use of Lap Joint Flanges at points where severe bending stress occurs should be avoided.

Blind Flange

A Blind Flange has no bore, and is used to close ends of piping systems. A blind flange also permits easy access to a line ones it has been sealed. The blind flange is sometimes machined to accept a pipe of the nominal Size to which reduction is being made. The reduction can be either threaded or welded.

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