How To Weld A Pipe To A Flange

It is not recommended for high-pressure applications. They are usually used in small bore piping where the piping specification is socket weld.

Pin On Stainless Steel Flange

The X measure on the image are approximately.

How to weld a pipe to a flange. Pipe to flange welding machine. API Std 1104 Standard for Welding of Pipelines and Related Facilities calls for a 116 space. The point is to create a expansion gap 1 fillet weld between the flange and the pipes or fittings.

According to ASME B311 to execute a flanged connection using a socket weld flange the pipe shall be at first inserted in the socket of the flange until it reaches the bottom of the flange then it should be lifted by 16 mm and finally welded. For welding Neck and Lap Joint Stub and Flange applications an initial root gap spacing between pipe and flange should be 116 to 18. Currently we recess the pipe about 18 to 14 in from the face of the flange and Tig weld the inside w 18 ER70s2.

The diameter of the slip-on flange is larger than the outer diameter of the pipe on which it is fitted. They are not used in severe services due to stagnation of fluid at the socket. ASME B311 1998 1273 Preparation for Welding E Socket Weld Assembly says.

The connection with the pipe is done with 2 fillet welds as well at the outside as also at the inside of the flange. Fillet welding is done from outside on the pipe. Ideal for smaller pipe diameters in low-temperature and low-pressure scenarios socket-weld flanges feature a connection in which you place the pipe into the flange and then secure the connection with a single multi-pass fillet weld.

Set in the pipe enough from the face so you dont melt the edge of the gasket face max of. Socket-Welded Flanges can be FF or RF. A pipe flange connects piping and components in a piping system by use of bolted connections and gaskets.

This makes this style simpler to install than other welded flange types while avoiding the. Socket-Weld Flanges has a female socket in which the pipe is fitted. Go with a double fillet weld with the weld legs the pipe wall thickness.

This space is necessary to do not damage the flange face during the welding process. The counter bore allows the pipe to fit into the socketcounter bore. Generally it is used in small bore piping and only suitable for low pressure and temperature application.

ASME B311 Preparation for Welding E Socket Weld Assembly saysIn assembly of the joint before welding the pipe or tube shall be inserted into the socket to the maximum depth and then withdrawn approximately 116 16 mm away from contact between the end of the pipe. When welding a flange fitting or a piece of pipe together the gap spacing for welding them is established by the Welding Qualification. In assembly of the joint before welding the pipe or tube shall be inserted into the socket to the maximum depth.

WELDING ELECTRODES AND FILLER METALS Materials Table 1 Welding process for different materials Storage Facilities PREPARATION OF PARENT METAL Edge Formation Cleaning Weld Preparation Branch Connections ASSEMBLY FOR WELDING Alignment of Pipes Branches Flanges and Fittings Tack Welding WORKMANSHIP. Then we weld the outside of the flange to the pipe Tig root 18 ER70s2 and cover w 7018. Welding Neck This flange again places the weld in an area away from the flange face and offers more strength against pressure and heat.

Insert the pipe end into socket weld flange until the pipe bottom touch the shoulder area pull back 16mm 116 distance of the inserted pipe then do fillet welding. Wall thickness of pipe 3 mm. Socket Weld Flange - This is similar to a slip-on flange except they have a bored and counter bore.

These flanges were first designed for small diameter high pressure pipe. This pipe to flange welding machine is simultaneously welding the inner and outer welds on both ends means 4 torches simultaneously welding of the pipe to create the connection between the pipe and the flange. The bore of the flange is the same diameter as the inside of the pipe.

The cost of flange and fabrication is moderate. The hole alignment is independent from the welding process and this means welders cant distort the face of the flange with hisher work. On a socket weld its 116 and can be established with a special spring.

METHODS OF WELDING FLANGES TO PIPE The methods used in welding flanges to pipe will vary according to the type of flange and are basically the same as those used in standard welding practices. The flanges are then fastened in place by two fillet welds. Socket welded flanges shall be specified with connection pipe thickness to ensure proper bore dimensions.

How is Socket Welding Flange Generated. Most commonly used flanges are weld neck flange slip on flange blind flange socket weld flange threaded flange and lap joint flange RTJ Flange. These Flanges are welded only on outside of the Pipe.

The connection with the pipe is done with 1 fillet weld at the outside of the flange. One fillet weld is executed on the inside and another on the outside of the flange cavity.

Fit Up Jig For Tacking Slip On Flanges I Made At Work Welding Projects Shed Projects