A Socket Weld Flange is similar to slip-on flanges, however, socket welds have an internal recess on the inside diameter to allow for a smoother flow of the process fluid.  The positive of this is that is creates a smooth bore with the proper welding and grinding.They 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.

A182 F304 ANSI B16.5 SW Flange

Material:

Carbon steel: ASTM A105,ASTM A105N,GB 20,C22.8 etc.

Alloy steel: ASTM A305 LF2,CL1/CL2,ASTM A182 F5,F9,F11,F12,F22,F91.

Stainless steel: ASTM A182 F304,F304L,F316,F316L,F321 etc.

Low temperature steel: ASTM/ASME A350 LF2.

High performance steel: ASTM/ASME A694 F42 , F52, F56, F60, F65, F70

Standards

ASME ANSI B16.5,ASME ANSI B16.47.

API 605,API 6L.

MSS SP 44

CSA Z245.12

EN1092-1,EN1759-1.

DIN2630,DIN2631,DIN2632,DIN2633,DIN2634,DIN2635,DIN2636,DIN2637,DIN2638.

BS1560,BS 4504,BS 10.

AFNOR NF E29-200-1

ISO7005-1

AS2129

JIS B2220

UNI 2276. UNI 2277.UNI 2278 .UNI 6089 .UNI 6090

Application for Socket weld flange:

Natural gas,chemical,petroleum,ship building,marine,paper making, metallurgy, electric, power, boiler , etc.