ASME B31.8 - Welding

[visitor]

When welding a sleeve on a pipeline (Type B reinforcing sleeve, or TDW Spherical 3-way tee, etc.) and the sleeve has a wall thickness much thicker than the original pipeline (or even the thickness necessary for the pressure design), can you bevel the end of the sleeve to reduce the thickness at the end fillet welds? The weld size (leg) should be at least "t" but not more that 1.5t.

- I suppose the answer might be different for a reinforcing sleeve (like an Armadillo or Allen Edwards) than a shell like a TDW Spherical 3-way tee.

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Also, if you are welding up the longitudinal seams of a sleeve and the manufactured thickness far exceeds the amount required, can you bevel back the top at a steeper angle (say 60 to 75 degrees) and just weld out through the original bevel (probably 30 to 37.5 degrees)?

 

[CC9513493]

Dear Engr
You can Consulting API 1104 last edition or API 1107

If this Fitting It works only as Sleeve Encirclement you use backing plate External only with Fillet Weld.If this Works as Tee Encirclement it is neccesary to warranty full penetation but you can use backing pkate in order to evit to welding on metal pipe,

Regards
Jorge