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Hi everyone, I'm currently working with EEMUA 158, but I’m finding the qualified diameter range a bit confusing. Could anyone help clarify how it actually works? 1. If the diameter of the tubular is below 508mm and not within ±50% of the diameter qualified; => PQR with OD = 453mm (<508mm)...

@kingnero Thanks bro. I searched for LB-52U already. But I just got as posted photo. For other manufacturer such as Hyundai, Lincoln, Oxford,...,they mentioned quite clear, but not Kobelco.

@MintJulep Thank you so much for your advice. Sure that LB-52U must be baked (dried) before using except the vacuum packed electrode.

@MintJulep Appriciated your reply. Can you please advice me what high humidity value is? Because client request me mention the detail of temperature and humidity value in the procedure.

Hi guys, I got the Safety Data Sheet of Kobelco LB-52U welding consumbale, and it mentioned the storage condition of LB-52U like this: How can we set-up a room without humidity? Is there anything wrong here? Can you please share me the experience to storage of LB-52U? What is temperature and...

@bruv, Great! Many thanks bro. Is there any heat treatment required when welding @bruv? Can you please me more detail of it.

@btrueblood @EdStainless Thanks a lot for your guidance and advice. I'll look into that information.

Hi experts, I’m working on creating a pWPS and PQR for welding ASTM B148 C95800, and it’s my first time dealing with this material. Could you please suggest the best filler metal for the GTAW welding process? Thanks a lot for your help!

@Fahad Thanks for your response. About MDMT of this job: we just prepare and develope the PQR/WPS for company first, and then we can show to client for projects in near future. So we do not know the MDMT for a specific job. "I have question, why third option Fusion line + 2 CVN test tested at...

Hi all, I have PQR according to ASME IX and ASME B31.3 welded by GTAW A106 Gr.B with CVN test temp. as below: - Weld Metal CVN test at -40 deg C: Passed. - Fusion Line CVN test at -40 deg C: Passed. - Fusion Line +2 CVN test at -20 deg C: Passed. So can I develop a WPS with CVN test temp. at -20...

Hi experts, I am a little bit confused with foot note g, table 10.12 AWS D1.1 about positions qualified. The welder tested with box tube to plate same as figure 10.22 without backing for CJP groove weld. But in foot note g, table 10.22 AWS D1.1 stated that "not qualified for joints welded from...

Hi experts, Can you pls advice me the qualification range for base metal according to AWS D1.3. Our company conduct welding sheet steel A1011 Gr.36 Type 1 to sheet steel A1011 Gr.36 Type 1, so I am looking for a state in AWS D1.3 for this. Your advice/response will be appreciated. Thank so much!

Hi experts, Our company qualify welders with 6" test coupon using GTAW wire AWS A5.14 ERNiCrMo-3 and SMAW electrode AWS A5.1 ENiCrMo-3 according to AWS D1.1. Can you please advise me what the qualification range of filler metal for welders. I did not find out the clause mention to those ones. I...

Thanks weldstan.

Hi all, Can you help me explain what roll number and item number are in below MTC? Why do those steel plates have same roll number but different heat number? Thanks all.

Hi Dhiva-ENG You can not develop WPS according to ASME IX while your PQR according to DNV Rules and ISO 15614.