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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

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