Raised Face Flanges

Raised Face Flanges

Raised Face Flanges Manufacturers, Exporters & Suppliers in India as well as in various other countries worldwide.

304/304L Raised Face Flanges (RF), 310/310S Raised Face Flanges (RF), 316/316L Raised Face (RF) Flanges , 317/317L Raised Face (RF) Flanges , 321/321H Raised Face (RF) Flanges, 446 Raised Face Flanges, 347/347H Raised Face Flanges (RF).   

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

The Raised Face (RF) Flange type is the most commonly used flange face and it is easy to identify. It referred to as raised face because the gasket surfaces are raised above the bolting circle faces.

Specifications covering the manufacture & dimensions of flanges:

ASTM SPECIFICATIONS:

ASTM specifications regulates approval of raw materials for which flanges can be made as well as its specifications.

For stainless flanges it is:
ASTM A.182 - Forged or Rolled Alloy Steel Pipe Flanges & Fittings are mostly used for high temperature services.

ANSI AND MSS SPECIFICATIONS:
The standards governed to the dimensions and tolerances to which fittings are manufactured:

  • MSS SP.6 - Flange Facings
  • MSS SP.25 - Marking of flanges
  • ANSI B. 16.5 - Steel Pipe Flanges & Flanged Fittings (½ inch to 24 inch nominal diameter)
  • MSS SP.39 - Nuts & Bolts for Flanges
  • API-605 - Large Diameter Flanges for petroleum Usage. (Over 24 inch diameter)
  • MSS SP.44 - Large Diameter Pipeline Flanges. (Over 24 inch diameter)

The ASME Code is not as such a standard process of calculation as such but section VIII provides the procedure for calculating dimensions for all pressurized vessel flanges.

The following below are not flange specifications, they only influence the manufacture of forged steel flange.

  • ANSI B. 36.19 - Standard for Stainless Steel Pipes
  • ANSI B. 31.10 - Code for Pressure Piping
  • ANSI B. 36.10 - Standard for Wrought Steel pipes
  • ANSI B. 31.8 - Gas Transmission & Distribution of Piping systems
  • ANSI B. 31.7 - Nuclear Power Piping System
  • ANSI B. 31.5 - Refrigeration Piping System
  • ANSI B. 31.4 - Oil Transportation Piping
  • ANSI B. 31.3 - Petroleum Refinery Piping
  • ANSI B. 16.10 - Valve Dimensions Face and End
  • ANSI B. 16.11 - Forged Fittings Socket Weld and Threaded Weld


Material of ConstructionStandard Grades
Stainless Steel Raised Face Flanges ASTM A240, A182
201, 202, 304L, F 304, 304H, 309S, 309H, 310S, 310H, 316, 316Ti, 316H, 316L, 316LN,  317, 317L, 321, 321H, 347, 347H, 904L
Carbon Steel Raised Face Flanges ASTM A105 Gr. F70,65,60,56,52,46,42
Alloy Steel Raised Face Flanges ASTM A182 F91,F22,F11,F9,F5,F1
Nickel Alloy Raised Face Flanges ASTM SB564, SB472, SB160, SB162   Nickel 201 (UNS No. N02201), Nickel 200 (UNS No. N02200), Monel 400 (UNS No. N04400), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Monel 500 (UNS No. N05500), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625),
 Inconel 601 (UNS Alloy 20 (UNS No. N08020), No. N06601), Hastelloy C 276 (UNS No. N10276)
Copper Alloys Raised Face Flanges ASTM SB151, SB152, SB 61, SB 62  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 Raised Face Flanges ASTM A350 LF3, LF2
Duplex Steel Raised Face Flanges ASTM A240, A182
UNS F 61, F 60, F 55, F 53, F51, F 45, F 44