What is the minimum distance between two welding joints?

[losmoscas]

I'm looking for your information about minimum distance between two weld joint should be 11/2" (50mm) or 5 times pipe diameter, but I could not find this information on any standard. Are there any standart are telling that this?

[abhijit.koyande1987]

this as per ASME Sec IX-welding code

[polka]

Polka,

What is your design or construction code? Construction code Api 1104

Where is the welded joint? Is it in a pressure equipment, say piping, pressure vessel, etc. or in a storage tank or steel structure? These welds are for air release valves and for other components like valve,clappe or manholes

If in a pressure equipment, is the weld joint a longitudinal weld or a circumferential joint? Not a pressure equipment valves or clappes

What is the degree/type of NDT? 100% x-ray

Cheers,

I tried to answer your questions.

[Lucas2008]

I in your place. I will install a elbolet and valve the elbolet is a fittings that permit you install the branch in the elbow. this solution is not in the the highest point but i think it is a solution.
otherwise you must have minimum 50 mm at weld. this dimension is a thumb rule. The codes indicate the variables that you keep in mind for taht you can determinate this dimension.
Hope this will help you

[tacka]

50 mm is minimum, only if you dont have space, for pipes up to 4" i advise you to go 75-100 mm, and for diameters above 4" use 1x Pipe Dia.

[yanda saputra]

As per ASME B31.3 para 341.4.1.6.B " when a circumferential weld with an interesting longitudinal weld is examined, at least the adjacent 38mm(1.5 Inch) , of each interesting weld shall be Examined"

[go6o]

It depends also to the NDT.
For example when there is UT, need to have min. 100mm distance...