[MW:14723] Re: User acceptance of 45° Elbows

Where are you carrying out the inspection -- is it at the supplier's shop?

 

They would normally have two plates joined at right angles and machined accurate for angle and flatness.

 

The elbow with one of its ends is placed on the horizontal plate and the other end is made to meet the vertical plate's inner face.

 

Now you can actually measure or use sizewise pre-marked lines (on both the faces) to see the centre to end distance, i.e. like a gauge. This also makes it possible to check the squareness of the end.

 

However, it has its own limitations of weight, mobility, size range, wear & tear, corrosion and such other things.

 

If anybody knows any other method, pl. do share.

 

Regards

BM

 
On Friday, June 29, 2012 10:05:19 AM UTC+5:30, M. Ali Halai wrote:

Dear Experts,

 

We are usually engaged in carrying out the user acceptance inspection of various piping and fittings. Out of those, butt weld end elbows are inspected as per ASME B 16.9.

 

Now particularly the 45° Elbows are very hard to inspect due to the fact that the center to end distance given in the code cannot be easily measured as the elbow cannot stay flat on the ground and rotates according to its center of mass.

 

One way we discovered was to join two elbows end to end and measuring the face to face and comparing it to the dimensions of 90° Elbow, but still chances of error remain.

 

Any comments / suggestions are much appreciated.

 

 

Regards,

 

Muhammad Ali

On Friday, June 29, 2012 10:05:19 AM UTC+5:30, M. Ali Halai wrote:

Dear Experts,

 

We are usually engaged in carrying out the user acceptance inspection of various piping and fittings. Out of those, butt weld end elbows are inspected as per ASME B 16.9.

 

Now particularly the 45° Elbows are very hard to inspect due to the fact that the center to end distance given in the code cannot be easily measured as the elbow cannot stay flat on the ground and rotates according to its center of mass.

 

One way we discovered was to join two elbows end to end and measuring the face to face and comparing it to the dimensions of 90° Elbow, but still chances of error remain.

 

Any comments / suggestions are much appreciated.

 

 

Regards,

 

Muhammad Ali

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