Socket weld flange (SW flange), a popular type of pipe flange, was initially developed for use on small-sized high- pressure piping. The fabrication of this type of flange is similar to that of a socket weld flange (WN flange). However, the internal pocket of a socket weld flange (SW flange) allows for a smooth bore and better fluid flow. When provided with an internal weld, the static strength of this flange is equal to slip-on flange, but the fatigue strength is 50% greater than double welding slip on flanges. Smooth bore conditions in such a flange can easily be attained without having to bevel the flange face and, after welding, to reface the socket weld flange as would be required with slip on flanges. For this reason, the internally welded flange is popular in chemical process piping.
Size: 1/8" NB TO 48"NB.
Class: 150#, 300#,400 #,600#,900#, 1500# & 2500 #.
Stainless Steel: ASTM A 182, A 240
Grade: F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L, Duplex Stainless Steel UNS S31803, 2205, Super Duplex Stainless Steel UNS S32750
Carbon Steel: ASTM A 105, ASTM A 181
Alloy Steel: ASTM A 182, GR F1, F11, F22, F5, F9, F91
Nickel Alloys: Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276
Copper Alloys: Copper, Brass & Gunmetal
Flange Facing Types OF Socket Weld Flange (SW Flange):
America Series: Flat face(FF),Raised face(RF),Tongue(T),Groove(G),Female(F),Male(M),Ring type joints face(RJ/RTJ)
Europe Series: Type A(Flat Face),Type B(Raised Face),Type C(Tongue),Type D(Groove),Type E(Spigot),Type F(Recess),Type G(O-Ring Spigot),Type H(O-Ring Groove)
ANSI: ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16.48
DIN: DIN2527, DIN2566, DIN2573, DIN2576, DIN2641, DIN2642, DIN2655, DIN2656, DIN2627, DIN2628, DIN2629, DIN 2631, DIN2632, DIN2633, DIN2634, DIN2635, DIN2636, DIN2637, DIN2638, DIN2673
B.S: BS4504 , BS4504, BS1560, BS10
The recess on the inside diameter of the socket weld flange (SW flange) allows for a good fit of the pipe allowing for a smooth flow of liquid.
Socket welding flanges work well for smaller sizes and higher pressure temperature conditions. They are similar to slip-on flanges, but must specify the schedule of the pipe where they will be used for with socket welds.
Application for socket weld flange (SW flange):
Natural gas,chemical,petroleum,ship building,marine,paper making, metallurgy, electric, power, boiler , etc.
Yaang Pipe Industry, as a first class manufacturer of socket weld flange (SW flange) in China, supplys a variety of stainless steel flanges to satisfy our customers’ specifica requirements, which include different size ,different schedule, different pressure and different finish faces. Our products are produced strictly according to the required standard. Our raw material for threaded flanges all are purchased from big steel companies which can make sure the material in a high quality.
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