Flanges according to ASME B16.47, B16.5
Steel plain welding flanges
Flanges ANSI/ASME Slip On (Flange SO)
DN: 1/2″–60″.
Class: 150–1500, for 1500 lbs only 1/2″–2 1/2″ (ANSI B 16.5); 75–350 (ANSI B 16.47)
Steel threaded flanges
ANSI/ASME Threaded (Screwed, ST) Flanges
DN: 1/2″–3″.
Class: 150–1500, for 1500 lbs only 1/2″–2 1/2″ (ANSI B 16.5).
Weld neck steel flanges
ANSI/ASME Welding Neck Flanges (WN, Weld Neck)
DN: 1/2″–60″.
Class: 150–2500 (ANSI B 16.5); 75–900, for 900 lbs only 26″–48″ (ANSI B 16.47).
Lapped joint flanges (lap-jointed flanges, loose flanges)
Flanges ANSI/ASME Lap Joint (LJ, Lapped Flange)
DN: 1/2″–24″.
Class: 150–1500, for 1500 lbs only 1/2″–2 1/2″ (ANSI B 16.5).
Socket weld flanges (splayed flanges)
ANSI/ASME Socket Weld Flanges (SW)
DN: 1/2″–24″.
Class: 150–1500, for 1500 lbs only 1/2″–2 1/2″ (ANSI B 16.5).
Steel blind dicks
Flange ANSI/ASME Blind (Blank)
DN: 1/2″–60″.
Class: 150–2500 (ANSI B 16.5); 75–900, for 900 lbs only 26″–48″ (ANSI B 16.47).
Sealing surface
RF
for classes 150, 300
Raised face (Male connector for 150 and 300 grades)
RF
for grades 400 and higher
Raised face (Male connector for 400 and higher)
SM
Small male face (Narrow male connector for 300 grade and higher)
SF
Small female face (Narrow female connector for 300 grade and higher)
LM
Large male face (Wide male connector for 300 grade and higher)
LF
Large female face (Wide female connector for 300 grade and higher)
ST
Small tongue face (Narrow tongue for 300 grade and higher)
SG
Small groove face (Narrow groove for 300 grade and higher)
LT
Large tongue face (Wide tongue for 300 grade and higher)
LG
Large groove face (Wide groove for 300 grade and higher)
RJF
Ring joint face (Octagonal or oval gasket for 150 grade and higher)
GP240GR; GP240GH; GP280GH; G20Mo5; G17Mn5; G20Mn5; P250GH; St-22; C22; Ck22; S44.2; St44.3 and others
510D1; S355J2G3; St52-3 G; S325G; St52-3B; 42Cr4 and others
G17CrMo5-5; G17CrMo9-10; GX23CrMoV12-1; G9Ni10; G9Ni14; 13CrMo4-5; 13CrMo4-4; 14CrMo4-5; 24CrMoV5-5; 15CrMoV5-10 and others
GX2CrNi19-11; GX5CrNi19-10; GX5CrNiNb19-11; GX2CrNiMo19-11-2; GX2NiCrMo28-20-2; GX5CrNiMo19-11-2; GX5CrNiMoNb19-11-2; X4CrNiMo17-13-3; X6CrNiTi18-10; X10CrNiMoTi 18-10; X10CrNiMoTi 18-12 and others
GX15CrMo5; 12CrMo19-5; X16CrMo5-1 and others
