Re: [MW:32080] SMALL DIAMETER PROCEDURE QUALIFICATION AS PER ASME SEC IX

We did some instrument tubing similar to your application

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On Sat, 20 Mar 2021 at 10:48 am, Vishwas Keskar

<vvkeskar123@gmail.com> wrote:

Thanks  all ,

Its Customer specific requirements that each Production joint size   shall require PQR.

We deployed as a team for test piece preparation . We Cut those  small pipes  into   half sections  using hexaw blades in our workshop and then pressed to make these into Flat Strip , We sent these test pieces to lab for further testing.

Face and root bend test set is satisfactory

Have to go extra mile for this. But at the end its happy ending

Vishwas 

On Fri, Mar 19, 2021 at 2:09 PM George Dilintas <dilintas@gmail.com> wrote:

Diameter is not an essential variable for PQR. Why you torture your self?

Στις Πέμ, 18 Μαρ 2021 στις 5:07 π.μ., ο/η Vishwas Keskar Welding Manager WELDING <vvkeskar123@gmail.com> έγραψε:

Dear Experts ,

PQR is to be qualified  for 

6.35 mm OD X 0.89 mm thickness 

Welding Process - Autogenous Fusion - GTAW Orbital WELDING 

Code - ASME SEC IX 

Material - SA 213 TP316L

Tensile test - 2nos 

Face bend test - 2nos

Root bend test - 2nos 

Full section tensile test is carried out and found satisfactory 

Bend test samples can not be prepared due to less thickness(0.89mm) and small diameter (6.35mm).  Pipe Sectioning  as per permitted by ASME  for small diameter is tried  but could not do it .

When tried to  cut into sectioning for  bending test piece preparation , pipe is getting bent and sectioning is not possible .

 Experts , Pl. help how to go about bend testing or any other way forward 

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis

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