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A105N Carbon Steel Socket Weld Flange

What is a SW flange and what about its specification.

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What is a SW Flange

Socket-weld pipe flanges are typically used on smaller sizes of high pressure pipes. These pipe flanges are attached by inserting the pipe into the socket end and applying fillet weld around the top. This allows for a smooth bore and better flow of the fluid or gas inside of the pipe.

Socket weld flange is designed as the pipe is inserted into it’s bore and single fillet weld on the outside of flange. It is common used for small diameter high-pressure piping system. To some extent, it is smilar to slip on flange.

Forged steel flange is a disc-shaped piece of equipment used to connect a pipe to fittings or valve or other component to form a pipework system. Usually flange has been attached to pipe or tube end to, and then a gasket is inserted in the middle to form a seal. Finally they are joined together with bolts and nuts.

Specification of Forged Steel Flanges

Size Range 1/2″- 3″ / DN15 – DN80
Pressure Rating Class 150, 300, 600, 1500
Standard ANSI / ASME B16.5
Carbon Steel ASTM A105 / A105N
Low Temp Carbon Steel ASTM A350 LF2 / LF3
Pipeline Steel ASTM A694 F42 / 46 / 56 / 60 / 65
Alloy Steel ASTM A182 F11 / 12 / 12 / 5 / 9 / 91 / 92
Stainless Steel ASTM A182 F304 / 304L / 304H, 316 / 316L, 310S, 317, 347, 904L
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