Dear Mr. Sankaran, Thanks for the reply and your understanding. rgds, Sridhar. On Mon, 4 May 2026 at 15:18, Ashishranjan - Domech Fabricators Pvt.Ltd. < planningdfplril@gmail.com > wrote: Yes, you can use multiple PQRs to support a single WPS under AWS as well but it’s handled a bit differently than in ASME Section IX, and you need to be careful about how you justify it. Regards, Ashish Ranjan +91 9555864374 Save a tree...Please consider your environmental responsibility. Before printing this e-mail message, ask yourself whether you really need a hardc opy. " Confidentiality Warning : This message and any attachments are intended only for the use of the intended recipient(s), are confidential and may be privileged. If you are not the intended recipient, you are hereby notified that any review, re-transmission, conversion to hard co...
What the Macro Suggests From the image: Fusion is occurring on the upper groove walls. Root area shows an unfused triangular gap / cold lap zone . Weld metal is flowing around the joint rather than penetrating fully to the root. This is typical when the arc cannot adequately reach the root face or root land. Likely Causes 1. Amperage Too Low for Root Pass 82 A for first pass on a restrained joint with 50 mm thick tubesheet may be too low, especially if heat is rapidly absorbed by the heavy SA-516 tubesheet. The tubesheet acts as a heat sink , pulling heat away from the root. 2. Groove Design / Root Land Too Heavy If the groove has: narrow included angle excessive land/root face insufficient tube projection or mismatch then penetration becomes difficult at lower amps. 3. Arc Position / Torch Angle If arc is focused too much on filler or upper bevel edges rather than root corner, fusion at the bottom will be poor. 4. Travel Speed Too F...