Sch 10 Stainless Steel Weldolet 2

[shughes123]

hello..
Is it recommended to use Sch 10 Stainless Steel Weldolet? and is there any specific term for these types of weldolets which are thin walled?

 

[europipe]

Know the dilemma, it's a too massive block of material,
not good for the stress in the material.
maybe You can better use a piece of sch.40s or 80s., lenght approx. 3".
Saw the elbolets, that's terrible.

 

[shughes123]

whats this Sch 10 weldolet of SS called

 

[DSB123]

as Europipe says "its a fair lump of material" to be welded onto another Sch10 pipe.Generally the fabricators do not fully weld these items out as is required to be able to use the Code SIF's. So in reality in your Stress analysis you cannot assume the Code SIF's for a weldolet as the finished branch does not conform to the requirements of "fully welded out"

 

[europipe]

Sorry, Ethisham, I meant a piece of pipe sch40 or 80, 3" long.
Don't know wether it has a name.
Some firms give it a name like 'company'-olet

 

[moltenmetal]

A butt welding "pipet" is another option. But a stub-in with a piece of heavier schedule pipe (if necessary) as reinforcement is the most practical solution. 3000# o-lets, when welded to fill the factory weld bevel, are guaranteed to turn sch10S pipe into a banana. They're even known to turn sch40 pipe into a banana on occasion.

 

[shughes123]

Thanks guys...I had heard a specific name about this type of weldolet particularly of SS material....

 

[Duwe6]

ehtisham,l if there was such a thing, a bunch of us would be buying them [including me] As usual moltenmetal got it exactly right - an o'let is "integrally-reinforced 3000# welding fitting" and will turn any Sch10 pipe it is attached to into a banana.

The 'hot setup' is to use a set-on piece of pipe for your branch connection, per europipe. The rule-of-thumb is to drop down at least 2 sizes and go up at least one wall thickness. Thus on a 4NPS sch10 pipe header, the biggest branch you could set-on directly [no o'let used] would be 2NPS. And I would use 2NPS Sch40 [2 pipe schedules thicker]. With a full-penetration weld and a generous reinforcing fillet around this piece of 2NPS, it will have the same pressure rating as your 4NPS Sch10 header. This stub of thicker pipe only needs to be about 2 - 4 pipe diameters long, but 3 - 6 inches is 'more pleasing to the eye' on the 1/2, 3/4, and 1NPS branch connections.

 

[DekDee]

Have a look at page 40 of the Bonney Forge Catalogue - there are Sch 5s and Sch 10s noted, they are called Flexolets.
Whether they are practical or not ? I have seen plenty of bananas before.
Cheers,
DD

 

[moltenmetal]

The BW pipets and flex-o-lets are great in a catalog, but tough to get your hands on in a reasonable period of time unless you stock them yourself. Chunks of pipe one schedule up are no problem.