Raised Face Flanges Manufacturers, Exporters & Suppliers in India.

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

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

The Raised Face (RF) type is the most applied flange face, and is easily to identify. It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face.

Specifications covering the manufacture and dimensions of flanges:

ASTM specifications regulate approved raw materials for which flanges can be made and specifications .

For stainless flanges are:
ASTM A.182 – Forged or Rolled Alloy Steel Pipe Flanges & Fittings for high temperature service.

The standards govern the dimensions and tolerances to which fitting are manufactured:

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

The ASME Code is not a standard as such but section VIII provides the procedure for calculating dimensions For all pressurised vessels flanges. The following are not flange specifications but they influence the manufacture of forged steel flange

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


Material of Construction Standard Grades
Stainless Steel Raised Face Flanges ASTM A182 , A240 F 304, 304L, 304H, 316, 316Ti, 316H, 316L, 316LN, 309S, 309H, 310S, 310H,317, 317L, 321, 321H, 347, 347H, 201, 202, 904L
Carbon Steel Raised Face Flanges ASTM A105 Gr. F42,46,52,56,60,65,70
Alloy Steel Raised Face Flanges ASTM A182 F1,F5,F9,F11,F22,F91
Nickel Alloy Raised Face Flanges ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020),
Copper Alloys Raised Face Flanges ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200,
Low Temperature Carbon Steel Raised Face Flanges ASTM A350 LF2 , LF3
Duplex Steel Raised Face Flanges ASTM A182, A240 UNS F 44, F 45, F51, F 53, F 55, F 60, F 61