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  1. AWeld1

    Boiler Drain

    Gentlemen, We have proposed a Modification of Yard Drain with the concept to reroute the block HP drains into a 150mm diameter common line that connects to the block clean drains tank and to similarly reroute all the IP drains into a common 150mm diameter pipe that connects with the block...
  2. AWeld1

    A Change in weld progression using GTAW

    As per ASME IX QW-405.3 - A change from upward to downward, or from downward to upward, in the progression specified for any pass of a vertical weld, except that the cover or wash pass may be up or down. I understood that a change in weld progression is a nonessential variable but my question...
  3. AWeld1

    Welder Qualification

    Thank you for your responses but I think the above questions was not answered.
  4. AWeld1

    Welder Qualification

    Is ASME IX Table QW-461.9 Performance Qualification — Position and Diameter Limitations (Within the Other Limitations of QW-303) applicable for the Welder and Welding Operator Qualification especially for Plate Welding? In ASME IX Table QW-461.9, is Performance Qualification was also referred...
  5. AWeld1

    F-Number and A-Number

    If "P" stands for pressure in P-No. then "S" for structural in S-No., I would like to know what what does F and A means? As per QW-442 A.No is for the Classification of Ferrous Weld Metal Analysis for Procedure Qualification and QW-432 F-Number is for Grouping of Electrodes and welding rods for...
  6. AWeld1

    Deletion of Backing Gas

    Thank you very much sir. I really appreciate it.
  7. AWeld1

    Deletion of Backing Gas

    Thank you very much. It's now clear. What we did is we made a new WPS using the existing PQR. In the new WPS and deleted backing gas for the above mentioned material. I already reviewed QW-256, what I dindnt notice was that QW-356 was for the welders performance. One more thing, it was also...
  8. AWeld1

    Deletion of Backing Gas

    Is it correct to say that QW-408.8 is only applicable for double V groove and that requiring back weld or for combination weld such as GTAT/SMAW?
  9. AWeld1

    Deletion of Backing Gas

    The base material is 316L 1.2mm plate. I understand that if we are going to weld stainless steel we will need backing gas. But with regard to ASME IX, which one will rule, QW-408.5 or QW-408.8? It was defined also in ASME that backing gas includes argon.
  10. AWeld1

    Deletion of Backing Gas

    GTAW PROCESS is used in this procedure.
  11. AWeld1

    Deletion of Backing Gas

    We have a WPS for Stainless Steel that was supported by PQR with backing gas. We used this WPS to weld plate with thickness ranging from 1.5mm - 2.4mm. If we are going to deleted/remove backing gas and no root gap (square joint), do we need to make a new PQR? As per ASME IX ed. 2013...
  12. AWeld1

    welder certificates

    All applicants may present impressive documents during job application. And for welders, these documents are just secondary. Welders always have a Trade Test in order to prove their welding skill. With regard to the fake certification, I think the company involve must be informed that there...
  13. AWeld1

    WPS without using filler

    We are going to weld 1.2mm stainless steel plate that will be used in Portable Water Reservoir expansion joints. But our client wouldn't want any heat tint. Can we make a wps without using any filler wire? we will just melt the metals that are joint together using lap joint? please see the...
  14. AWeld1

    Straightness

    As per A500 - Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes " 1.2 This tubing is produced in both welded and seamless sizes with a maximum periphery of 64 in. (1626 mm) and a maximum wall of 0.625 in. (15.88 mm). Grade D requires...
  15. AWeld1

    Permissible Imperfections in Flange Facing Finish for Raised Face and Large Male and Female Flanges

    Thank you for the confirmation on how to measure the radial projection. With regards to ASME B16.5, the imperfection shown in the picture would actually fall on the radial projection (3mm) only and not on the redial projection and depth category (1.5mm), is that correct?
  16. AWeld1

    Permissible Imperfections in Flange Facing Finish for Raised Face and Large Male and Female Flanges

    B16.5 - 2003 Table 3 Permissible Imperfections in Flange Facing Finish for Raised Face and Large Male and Female Flanges Greetings! I would like to ask on how to evaluate the flange face imperfection referring to B16.5 - 2003 Table 3 p.61 Please see the attached document and please let me...
  17. AWeld1

    PMI: Limit of Detection (LOD)

    Greetings! I would like to know what LOD means in PMI? How do we judge the readings that shows LOD? For example: Material is P91 the reading is: Titanium: <LOD> 0.0245 ; wherein ASME II , Part A – SA-213/sa-213M (P91–Ti = 0.01 max) How can I explain LOD in the easiest way? THanks.
  18. AWeld1

    Microfissure

    There was a leak in the surface condenser which caused the seawater ingress. How dangerous is these intergranular cracks? Another information is that these intergranular cracking was also present in the tube-to-header weld in the new harp that will be used as a replacement. What causes...
  19. AWeld1

    Microfissure

    Sorry for the late reply, kinda busy this day. Material: same material was used, P22, in this particular issue of microfissure. Operation: base load Visual indication:on the weld root With regards to the measurement, they just sent us the report that the microfissure measures 0.2mm but not...
  20. AWeld1

    Microfissure

    Good Day! I am working in a Power Plant and as we have conducted an in-service Borescope inspection in the tube to header connection, some discontinuity was observed. The HRSG was operating for more than 2 years now. As per our clients report based on the photos taken during the inspection...

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