Stainless Steel Pipe Fittings

Socket Weld Flanges By

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Socket Weld Flanges By
Socket Weld Flanges, popular types 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 slip-on flange. However, the internal pocket of a socket weld 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 re-face 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. The counter bore is sightly larger than the Outer Diameter of the matching pipe, allowing the pipe to be inserted. A restriction is built into the bottom of the bore, which acts as a shoulder for the pipe to rest on, and has the same I.D. of matching pipe. The flow is not restricted in any direction.
Key Features:
The recess on the inside diameter of the socket weld 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.
Standard facing:
Raised face, ring – type, flat face, male – female, tongue – groove.welded both inside and out to provide sufficient strength and prevent leakage.They are ideal for low pressure applications.
Uses of socket weld flanges:
•   They are ideal for small diameter applications.
•   They are used for high pressure applications.
•   Socket weld flanges have an internal recess on the inside diameter which allow for a smoot flow of the process fluid.
•   They create a smooth bore with the proper welding and grinding.

•   Flange dimensions to ANSI B16.5. Dimensions “B” & “D” includes raised face thickness.
•   Bore (SCH) “C” purchasess to Specity. 
•   Larger outlet sizes are avilable on applications.
•   ANSI 150# / 300# 2mm Raised Face. 
•   ANSI 600# / 2500# 7mm Raised Face.
Materials : Nickel Alloy Socket Weld Flanges
• ASTM / ASME SB 564 / 160 / 472 
• UNS 10276 (HASTELLOY C 276 Socket Weld Flanges)
• UNS 2200 (NICKEL 200 Socket Weld Flanges)
• UNS 2201 (NICKEL 201 Socket Weld Flanges)
• UNS 4400 (MONEL 400 Socket Weld Flanges)
• UNS 8020 (ALLOY 20 Socket Weld Flanges)
• UNS 8825 INCONEL 825 Socket Weld Flanges)
• UNS 6600 (INCONEL 600 Socket Weld Flanges)
• UNS 6601 (INCONEL 601 Socket Weld Flanges)
• UNS 6625 (INCONEL 625 Socket Weld Flanges)

Copper Alloy Socket Weld Flanges 
ASTM / ASME SB 61 / 62 / 151 / 152.
C 70600 (CU -NI- 90/10) – Cupro Nickel Socket Weld Flanges 
C 71500 (CU -NI- 70/30) – Copper Nickel Socket Weld Flanges
UNS NO. C 92200, UNS NO. C 83600, UNS NO. UNS NO C 10100,
C 10200, C 10300, C 10800, C 12000, C 12200

Duplex Stainless Steel Socket Weld Flanges 
ASTM / ASME A/SA 182 UNS F 44, F 45, F51, F 53, F 55, F 60, F 61.

Alloy Steel Socket Weld Flanges – AS Socket Weld Flanges
ASTM SA 182 F1/F5/F9/F11/F22/F91

Carbon Steel Socket Weld Flanges – CS Socket Weld Flanges 
ASTMA 105 Gr. F42/46/52/56/60/65/70

Low Temperature Carbon Steel Socket Weld Flanges – LTCS Socket Weld Flanges
A350 LF2/A350 LF3

Value Added Services
• Hot Dip Galvanizing • Electro polish

Test Certificate
Mill Test Certificate as per EN 10204 / 3.1B

Duplex Stainless Steel : Duplex Stainless Steel Socket Weld Flanges
ASTM A 182 – Socket Weld Flanges
F 51 UNS S31803 Socket Weld Flanges
S32750 Socket Weld Flanges
S31500 Socket Weld Flanges
ASTM / ASME A/SA 182 UNS Socket Weld Flanges
F 44 Socket Weld Flanges
F 45 Socket Weld Flanges
F51 Socket Weld Flanges
F 53 Socket Weld Flanges
F 55 Socket Weld Flanges
F 60 Socket Weld Flanges
F 61 Socket Weld Flanges
Carbon Steel Socket Weld Flanges – CS Socket Weld Flanges 

ASTM A105 Socket Weld Flanges
ASTM A 694-F42 Socket Weld Flanges
F46 Socket Weld Flanges
F52 Socket Weld Flanges
F60 Socket Weld Flanges
F65 Socket Weld Flanges
F70 Socket Weld Flanges

Copper Nickel Socket Weld Flanges – Cu-Ni Socket Weld Flanges

Source: Source: Zhejiang Yaang Pipe Industry Co., Limited (

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