Branch Size on Header

Another rule of thumb is (or used to be) that branches must be at least two pipe sizes smaller than the header.

Larger or non-perpendicular branches have areas in the joint of lesser strength, and thus may need to be reinforced, similar to noxxle reinforcement on pressure vessels.

Tornado, I believe that 'rule-of-thumb' has been derived (misinterpreted) from many company standards that state:

If the branch is size-on-size: Use a 'Tee'

If the branch is one or two sizes smaller: Use a 'Reducing Tee'

There is no code limitation - just "good" practice/design/fabrication.

Save yourself the trouble - USE AN OFF-THE-SHELF 'TEE' or even a 'REDUCING TEE'.

I hope the competition is going to use that approach that works for me.

Our objective was to reduce the diameter inches by eliminating the reducing tees and using saddles.

Thanks

PI

Moderated Action: I removed the response post due to slander and inappropriate words.

{toned down response ...}

Yes, for any service that involves temperature, pressure, fatigue, or otherwise flammable/hazardous - your competition does use that approach, namely all large multinational oil companies and EPCs - particularly because of SIFs, thermal stress, and NDE requirements.

Only for benign service are other options qualified, including sweepolets, other 'olets, reinforced stubin, unreinforced stubin, .... allowed.

It seems that you are "shopping" for a code that you think will work for you. That is not right (nor even legal depending on your jurisdiction). Please first determine the code that you are to design to and READ it.

This is all dependent on the assumption that your company or client does not have a 'branch connection' standard.

Use a Bonney Forge weld-o-let. They have the reinforcement designed in. Any good industrial PVF distributor in your area should have them on stock. Cost somewhere around $250-300 - plus your labor for installation.

That kind of price is precisely why the OP wants to avoid using them.

You got it Tornado! Although an occasional tune up is good for the soul.

Everyone Thanks for the input much appreciated.