Stub On Connection Tollerance
Stub On Connection Tollerance
(OP)
Connection is Stub on between tube and header.
Tube ID is 69.1 mm and hole diameter is header is 50 mm.
Code of construction is ASME Section I.
Joint is full penetration weld as per Figure PW-16.1(a) but without backing strip.
So there is a mismatch of tube ID and Hole ID 69.1-50=19.1 mm.
Is this joint is acceptable?
Tube ID is 69.1 mm and hole diameter is header is 50 mm.
Code of construction is ASME Section I.
Joint is full penetration weld as per Figure PW-16.1(a) but without backing strip.
So there is a mismatch of tube ID and Hole ID 69.1-50=19.1 mm.
Is this joint is acceptable?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN





RE: Stub On Connection Tollerance
Why don't just you make the hole bigger?
RE: Stub On Connection Tollerance
Acceptable per 'general workmanship' or 'will function as designed' -- NO
RE: Stub On Connection Tollerance
We cannot make the hole bigger because we have placed the order for the header. Longitudinal Ligament efficiency governs the design in our case, we cannot decrease ligament efficiency by making the hole bigger.
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN