Where to get high quality expander flanges?

What is an expander flange?

Expander flanges, or expanding flanges, are used to increase the bore of the pipeline from a specific point to another or to connect pipes to other mechanical devices such as pumps, compressors, and valves that have different inlets sizes. The expanding flange represented in the picture is a welding neck flange with a larger bore on the non-flanged end.
Expander flanges can be used to increase the run pipe bore only by one or maximum two sizes and not more (example: from 2 to 3 or maximum 4 inches). Expander flanges are cheaper (and lighter) solution to using a combination of a butt weld reducer and a standard flange (which is the standard solution for pipe bore increases above 2 sizes). The most common materials for expanding flanges are A105 (high-temp. carbon steel), A350 (LTCS) and ASTM A182 (stainless steel and above). Pressure ratings and dimensions of expanding flanges are in accordance with the ANSI/ASME B16.5 specification and are available with raised or flat face (RF/FF).
Expander Flange 3 1 - Where to get high quality expander flanges?

Expander flanges are also known as a cost effective alternative to using a separate reducer – welding neck flange combination. The expander flange is available in a range of sizes and materials.

An expander flange is similar to a weld neck flange but with the hub expanding to a larger size (one or two sizes). If you have limited space or just need to connect to a larger pipe size, it provides a convenient way for equipment, pumps and valves. It can replace the use of a flange and reducer. Pressure ratings and dimensions are in accordance with ANSI/ASME B16.5.

Dimensions of Expander Flanges

Dimensions of Expander Flanges - Where to get high quality expander flanges?

It’s compact size saves space when compared to a reducer-welding neck flange. This flange has a raised face.

Only one butt-weld is needed to install the Expander Flange Very cost effective and competitively priced.

Materials Of Expander Flanges

Carbon Steel
  • ASTM A105, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2
  • ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70
Stainless Steel
  • ASTM A182 F304/304L, F316/316L, F316H, F310, F321, F44 (UNS S31254)
  • ASTM A403 WP316/316L
  • ASTM A403 WP304/304L
  • ASTM A182 F304, F304L, F316, F316L, F321
Alloy Steel
  • ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2
  • ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70
  • ASTM A182 F1, F5a, F9, F11, F12, F22, F91
Material
Test basis / Requirements
Delivery Condition
 C 22.8 (1.0460)  DIN 17243: 01.87 + VdTUEV – WB 350/3: 2009
  DIN 17243: 01.87
  VdTÜV – WB 350/3: 2009
 +N
 P250GH (1.0460)  DIN EN 10222-2: 04.2000
  National Annex
 +N
 P245GH (1.0352)  EN 10222-2:1999-12 + AC : 2000-02
 +N
 A105N / C21  ASTM A105/A105M-05/ ASME BPVC Sec.2 Part.A:04
  + VdTUEV399/3: 1996-09
  + NACE MR 0175: 2000
 +N
 A105N  ASTM A105/A105M-05/ ASME BPVC Sec.2 Part.A:04
  + NACE MR 0175: 2000
 +N
 C21 (1.0432)  VdTUEV – WB 399/3: 1996-09
 +N
 RSt 37-2 (1.0038)  DIN 17100: 1980-01
 +N
 S235JR (1.0038)  DIN EN10025-2: 2005-04
 +N
 16Mo3 (1.5415)  DIN EN10222-2:1999-12 + AC:2000-02
 +N
 WStE355 / TStE355
  (1.0565 / 1.0566)
 DIN EN17103 :1989-10, + VdTUEV-WB 354/3 : 2001-06
 +N or QT
 P355NH  (1.0565)  DIN EN10222-4: 1998 + A1: 2002-12
 +N
 WStE355 / P355NH 
  (1.0565)
 DIN EN17103 :1989-10, + VdTUEV-WB 354/3 : 2001-06
  + DIN EN10222-4: 1998 + A1: 2002-12
  + DIN EN17103 :1989-10
  + DIN EN10222-4: 1998 + A1: 2002-12
 +N or QT
 1.4301 (X5CrNi17-10)  DIN EN10222-5: 2000-02
 +AT
 1.4306 (X2CrNi19-11)  DIN 17440:1996-09
 +AT
 1.4401 (X5CrNiMo17-12-2)  DIN EN10222-5: 2000-02
 +AT
 1.4404 (X2CrNiMo17-12-2)  DIN EN10222-5: 2000-02
 +AT
 1.4432 (X2CrNiMo17-12-3)  DIN EN10222-5: 2000-02
 +AT
 1.4541 (X6CrNiTi18-10)  DIN EN10222-5: 2000-02
 +AT
 1.4571 (X6CrNiMoTi17-12-2)  DIN EN10222-5: 2000-02
 +AT
 1.4541 / F321  DIN EN10222-5: 2000-02 / +ASTM A 182/A 182M :2005
 +AT
 1.4571 / F316Ti  DIN EN10222-5: 2000-02 / +ASTM A 240
 +AT
 1.4404 / F316L  DIN EN10222-5: 2000-02 / +ASTM A 182/A 182M :2005
 +AT
 1.4306 / F304L  DIN 17440.1996-09 / +ASTM A 182/A 182M : 2005
 +AT
 1.4307 / F304L  DIN EN10222-5: 2000-02 / +ASTM A 182/A 182M :2005
 +AT
Flange
Test basis / Requirements
 DIN, Carbon Steel  DIN2519:1991-06
  + AD2000-W9: 02.04; -W13/ TRD107;TRB100;
  + Directive 97/23/EG Annex I, Chap. 4.3: 1998-02
 DIN, corrosion-resistant Steel  DIN2519:1991-06
  + AD2000-W9: 02.04; -W2; -W10 / TRD107; TRB100;
  + Directive 97/23/EG Annex I, Chap. 4.3: 1998-02
 DIN EN 1092-1, Carbon Steel  DIN EN 1092-1: 2008-09
  + AD2000-W9; -W13/TRD107;TRB100
  + Directive 97/23/EG Annex I, Chap. 4.3: 1998-02
 DIN EN 1092-1, Stainless Steel  DIN EN 1092-1: 2008-09
  + AD2000-W9; -W2; -W10/ TRD107; TRB100
  + Directive 97/23/EG Annex I, Chap. 4.3: 1998-02
 ANSI  ASME B16.5:2003
  ASME B16.47:2006
Applications Of Expander Flanges

The expander flange can be used to connect pipe to pumps, compressors and Valves.

  • Expander Flanges are used in Chemical and petrochemical processing.
  • Expander Flanges are used in electronics. Expander Flanges are used in processing equipment for maintaining product purity in handling foods, synthetic fibers.
  • Expander Flanges are used in marine and offshore engineering.
  • The expander flange is available in a range of sizes and materials.

Source: China Expander Flanges Manufacturer – Yaang Pipe Industry (www.metallicsteel.com)

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

If you want to have more information about the article or you want to share your opinion with us, contact us at sales@metallicsteel.com

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References:

  • https://www.yaang.com/expander-flanges-1.html
  • http://www.wermac.org/flanges/flanges_special_long-welding-neck_weldo-nipo_expander_reducing.html
  • https://www.steeljrv.com

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