The difference between butt welded pipe fittings and socket welded pipe fittings, how we can choose the suitable pipe fittings

The difference between welded pipe fittings and socket welded pipe fittings, ow to choose suitable pipe fittings during use?

As we all know, the pipe fittings used in industrial pipelines are divided into three types according to the connection mode: butt welding pipe fittings, socket welding pipe fittings and threaded pipe fittings. Now we introduce the difference between butt welded fittings and socket welded fittings.

The standard of butt welded pipe fittings is ANSI/ASME B16.9, they are used in pipeline to change direction, branch or change the diameter of the pipe or butt welded with the steel pipe. The types are elbows, tee, reducer and cap. The size is from 1/2 inch to 48 inches, and the pressure rating is from CLASS150 to CLASS2500. It is the most commonly used type in industrial pipelines.

The standard of socket welded pipe fittings is ANSI/ASME B16.11, they are used for small-caliber pipelines. It is necessary to insert the socket welded pipe fittings into the recessed area of the valve, pipe fittings or flanges for electric welding. Type is elbow, tee, cap, reducer,  union, nipple, socket, bushing and cross and other types. The cost of using socket welded pipe fittings is lower than that of butt welded pipe fittings. Usually the pipe size is below DN40 (Eathu can produce socket weld pipe fittings size from 1/8" to 6"), and the working pressure is 3000LBS, 6000LBS and 9000LBS.

In welding technology, the fillet weld formed by socket welding is the butt weld formed by butt welding. The strength and stress condition of the butt welding seam is better than that of the socket, so it is better to use butt welding in the occasions with higher pressure levels or in the harsh conditions of use. Usually the working pressure level is lower and most of the smaller specifications are used for socket welded pipe fittings, and for the high working pressure level, butt welded pipe fittings are generally used. Socket welded pipe fittings on high-pressure pipelines need to be 100% tested for flaw detection after installation to ensure that there is no leakage.

In short, the biggest difference between butt welded pipe fittings and socket welded pipe fittings is the difference in welding methods and pipeline sizes. The customers need to choose suitable fittings when use. Eathu can provide both butt welded pipe fittings and socket welded pipe fittings, we welcome your inquiry for them, email is info@eathu.com, skype/whatsapp/mob is +86 132 1015 3062.