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Socket Weld Flange

Socket weld flange simplified as SW flange, it has a recessed area (like a shoulder) in the flange bore, this shoulder serves as a guide to set the depth of the pipe that inserted to the flange. Socket welding flange initially designed for high pressure small diameters piping system.

Available Material:

Standard:
Carbon steel ASTM A105, ASTM A350 LF1/2, ASTM A181
Alloy steel ASTM A182 F5, F9, F11, F22, F91
Stainless steel ASTM A182 F304/L, F316/L
Outer Diameters: 1/2 inch to 24 inch, up to 2500#
Special made: 24'' to 60'', up to 900#
Wall Thickness: Schedule 40 to 160
Pressure Ratings: Class 150 to Class 2500
Face Type: RF, RTJ

How to Use

Insert the pipe end into socket weld flange, until the pipe bottom touch the shoulder area, pull back 1.6mm (1/16'') distance of the inserted pipe then do fillet welding. The point is to create a expansion gap (1 fillet weld) between the flange and the pipes or fittings.

How is Socket Welding Flange Generated

The socket welding flange was firstly to use for stainless steel superheater, due to avoid cracking defects caused by thermal stresses in heating processes, and after years development it became a standard applications for all types of material.

Advantages

Socket weld flange could replace threaded flange, to minimize the risky of leakage.
No need to beveling before welding.
Welding work outside of the pipe, will not penetrate the pipe

Materials

Carbon Steel: ASTM A105. ASTM A350 LF1. LF2, CL1/CL2, A234, S235JRG2, P245GH P250GH, P280GHM 16MN, 20MN ,20# and so on.
Stainless Steel: ASTM A182, F304/304L, F316/316L and so on.
Alloy Steel: A182 F11, A182F22, A182F12, A182 F5, A182F91, A182 F9 and so on.

Material

ASTM

Carbon steel: (ASTM A234WPB,,A234WPC,A420WPL6.
Stainless steel: (ASTM A403 WP304,304L,316,316L,904l,321. 1Cr18Ni9Ti, 00Cr19Ni10,
Alloy Steel: A234WP12,A234WP11,A234WP22,A234WP5, A420WPL6,A420WPL3

DIN

Carbon steel: St37.0,St35.8,St45.8
Stainless steel: 1.4301,1.4306,1.4401,1.4571
Alloy steel: 1.7335,1.7380,1.0488(1.0566)

JIS

Carbon steel: PG370,PT410
Stainless steel: SUS304,SUS304L,SUS316,SUS316L,SUS321
Alloy steel: PA22,PA23,PA24,PA25,PL380

10#,20#,20G,23g,20R,Q235,16Mn, 16MnR,1Cr5Mo,12CrMo, 12CrMoG, 12Cr1Mo

Types

Slip On Plate Flange/Plate Flange , Slip On Hub Flange/Bossed
Welding Neck Flange/WN flange/ Loose Flange/Lapped Flange /Backing Flange
Blind Flange/Blank flange, Lap Joint Flange /LJ Flange
Socket Weld Flange/SW Flange Threaded Flange/Screwed Flange
Loose Flange/Lapped Flange Backing Flange RTJ /o-Ring
Custom Flange/Special Flange Hot/Cold/Electro Gavanized Flange