How to Prepare a pWPS?
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Example situation for filling pWPS. CASE 1
We have to weld a pipe to pipe joint using GTAW welding. The material of the pipe is SA106 Gr B, 2" X Sch 40. Prepare the pWPS (Proposed Welding Procedure Specification) for the same.
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Previous Blog:
https://hareeshkv.blogspot.com/2018/07/asme-bpvc-section-ix-weldingtraining_22.html
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Please see the format in the previous blog for number references.
Table QW-451.1
(Continuous…);
3. Maximum thickness ‘t’ of deposited weld
metal qualified, in (mm)
a.
In our case it is 2t; that is 2x3.91mm=7.82mm.
This ‘t’ is calculated based on the process welded on a joint. If a joint is
welded with 2 process, then 2t will be applicable to both the process
b.
Suppose we welded a base material of
10mm by GTAW (4mm using gtaw – Root and Hotpass) and SMAW(6mm using smaw). The
range of weld metal qualified will be ; For GTAW: 2 x 4=8mm; For SMAW 2 x 6
=12mm
4. Type and number of tests required
(Tension and Guided -Bend Tests)
a.
Tension, Side bend, Face Bend and Root
bend tests as required are mentioned in this columns.
Will continue in next blog....
Disclaimer: Photos are taken from different websites. If this violates any copyright rules this will be removed. Please inform me if any of the photos or contents violates copyright rules. (through 13hareesh13@gmail.com). This blog is meant for educational purpose only. If it is used for any other means without the written consent from the author, the author will not be responsible. Author does not guarantee the accuracy of data used in this blog.All the information, data, photo/image, calculations presented in this blog should be used at the sole risk of the user. The blogger is not liable or responsible in any way for any damage, losses or costs arising from use of the blog for any purpose whatsoever or whosoever it may be. The blog is to be used at your sole risk and responsibility.
Disclaimer: Photos are taken from different websites. If this violates any copyright rules this will be removed. Please inform me if any of the photos or contents violates copyright rules. (through 13hareesh13@gmail.com). This blog is meant for educational purpose only. If it is used for any other means without the written consent from the author, the author will not be responsible. Author does not guarantee the accuracy of data used in this blog.All the information, data, photo/image, calculations presented in this blog should be used at the sole risk of the user. The blogger is not liable or responsible in any way for any damage, losses or costs arising from use of the blog for any purpose whatsoever or whosoever it may be. The blog is to be used at your sole risk and responsibility.
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