Stub In & Stub On in Piping

For "stub in," the stub or branch pipe extends to the inside of the main pipe. The hole in the main pipe is (usually) beveled to allow for a full-penetration weld. For "stub on," the stub extends only to the outside of the main pipe. The stub may be beveled, but if not only a fillet weld can be done. "Stub in" is generally stronger, and often much stronger.

Oxyacetylene cutting duration is roughly proportional to distance traversed times thickness of material; not diameter alone.

banu....

Both "STUB-IN" and "STUB-ON" are notoriously weak branch connections on piping systems. Often times, this type of branch connection is restricted to low pressure applications.

Both types are permitted by many of the international codes of construction, but with limitations on thier application. In many of these codes, they are called "UNREINFORCED BRANCH CONNECTIONS".

As I recall, they are banned from B31.3 Category M (lethal) service....

i need some clarification about stub end .

why we use stub end ? whether is to make a connection to polished material or anyother.

please help me to get cleared. am new to this sector.

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So there is more than one person at the facility though the number is indeterminate. Try asking around.

Hello

I look for standard Asme explain stub in or on and when we can use each of them .

Can they used with reinforcing pad (stub in & on) ?

Thank you