How To Weld Pipe To Slip On Flange

Slip on flange has to connect with a pipe firstly then connect a fitting. They are generally forged type with Hub.

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

If i remember correct you cant use slip on flanges on type M pipe systyems under ASME B313.

How to weld pipe to slip on flange. The calculated strength from a Slip On flange under internal pressure is of the order of two-thirds that of Welding Neck flanges and their life under fatigue is about one-third that of the latter. Slip-On Flange is suitable for low pressure and temperature application. These flanges are also knows as ANSI Flange or ASME B165 Flange.

The first weld is at this point a fillet weld around the end of the pipe wall joining the end of the pipe and the interior opening of the flange hole. One of the ways in which the flange is fastened is by screwing the flange pins in position to hold the pipe. They can also be fabricated from plates but without Hub.

Without a neck for the pipe to rest on it is necessary to double weld the connection with the pipe. Nondestructive testing after welding is not the same. In the zoomed in view of a pipe spool youll see the pipe isnt actually going inside the flange like it should for a slip fit.

2 is very important. Note for Slip-on flange ASME B313. Below are the flanges based on the pipe attachments.

On a proper slip joint flange the second weld is on the outside of the pipe on the back side of the bolt flange reinforcement between the outside of the pipe and the bolt flange reinforcement ring. See picture on the right. Then we weld the outside of the flange to the pipe Tig root 18 ER70s2 and cover w 7018.

Heres a picture of the pipe layout. Currently we recess the pipe about 18 to 14 in from the face of the flange and Tig weld the inside w 18 ER70s2. This will create a strong seal between the pipe and flange.

Depends what code your welding to whether its allowed or not Joe. How do slip-on flanges work. The connection with the pipe is done with 2 fillet welds as well at the outside as also at the inside of the flange.

If slip-on flanges are single welded the weld shall be at the hub. The weld seam connecting slip-on flange with pipe connected is class C. In this case it is a double weld both inside and outside thus providing the durability they need to avoid leaks.

However it is only recommended in sizes below 4. In most cases you will be welding the flange to the end of the pipe. Right now the pipe ends where the flange begins.

Both the inside and outside of the pipe is welded on the slip on flange. On a socket weld its 116 and can be established with a special spring. SO flanges slip over pipes and are designed to bit slightly bigger on the inside than the pipe.

By Jim Hughes Date 05-16-2011 1153. Was wondering about the correct way to weld slip on flanges. These flanges are welded on inside as well as outside to the pipe.

2 fillet welding required for SO flange one inside and one outside of flange. Its a slip flange so the pipe slides into the flange a certain distance depending on the size of pipe. When welding a slip-on flange the pipe or fitting is set back from the face of the flange a distance equal to the wall thickness -0 116.

The next step on the path toward completing a successful piping system is the drawing. Need for venting space between welds 3. Slip-on flanges must be slid into the pipe before welding.

Slip-On flange has a hole with matching outside diameter of pipe from which pipe can pass. The flange is placed on pipe and fillet welded from both inside and outside. F308 FLANGES AND GASKETS F3082 Specific Flanges.

For this 2 fillet welds are used on the outside as well as the inside of the flange. This assembly produces similar resistance to internal pressure and fatigue as the slip-on flange above. SLIP-ON FLANGES T 14 X T T 14 MAX 14 X T 008 T MIN T SLIP-ON FLANGES 14 X T 14 X T 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.

Slip-on flange nominal pressure is. Ive welded countless slip on flanges to reducers 90s tees etc. Classification of flanges based on pipe attachment 11 Slip-on Flanges.

06---40MPa and welding neck flange nominal pressure is. This type of flange. Consulting an experienced pipe distributor is the best place to start when selecting the proper flange.

Use a welder to weld the inside and outside of the flange to the pipe. Obviously the level of neck flange of adaptation to the stress is relatively lower. Determine where you will be welding the flange to the pipe.

Should be avoided where many large temperature cycles are expected particularly if the flanges are not insulated. Once the pins hold the flange in place the flange slightly tapped using a hammer to ensure its face is flush with the end of the pipe. The most important step in.

Slide the slip-on flange onto the pipe using your hand. A space shall be reserved between the end of the pipe and the end of the flange during welding work to avoid damage the flange face. This is where a socket weld assembly is a good choice.

It is used to insert the pipe into the inner hole of flange as the flange inner diameter is little bigger than the pipes outer diameter pipe and flange could be connected by lap welding at the top and bottom of the flange. By joe pirie Date 04-26-2011 1739. ASME B313 2004 Appendix F Precautionary Considerations.

A disadvantage of the slip on flange is that firstly a pipe must always be welded and then just a fitting. Their pressure resistance is rated at approximately 23 of that of a welding neck flange. The offset between welds cannot be greater than 18.

This flange will not resist shock and vibration as well as a weld-neck flange 2. For welding Neck and Lap Joint Stub and Flange applications an initial root gap. Socket weld flanges are connected to pipes using a single fillet weld executed on the outer side of the flange different from the slip-on flange type that requires two welds.

The pipe is generally inserted all the way inside the slip on flange leaving only the gap equivalent to wall thickness of pipe. Unlike welding neck flanges this flange does not have a neck to rest on the pipe and therefore double welding is necessary. They connect to the pipe through a fillet weld at the flange top and bottom.

Weld Neck Flange Expander Flange Lap Joint Flange.

Pin On Mechanical Symbols