Recent content by xuanthien

Dear Expert, My client ask me one question, "What would be the result of using temperature 1300 Deg C in heat treament for Carbon Steel". Pls advice me to answer this question.

Dear Sir, Pls advice welding consumable to weld repair_Buttering and hardfacing of Ni-Cr-Mo Material.

I mean, if wedlders qualify SMAW/FCAW process, he can weld full FCAW process with backing or not.

Dear Sirs, My welders qualified SMAW/FCAW process, SMAW use for Root pass only. This welders can weld full FCAW process with backing or not. Code Apply: ASW D1.1

Dear Gents, Refer QW-253 when CVN require, We "change" Holding Time of PWHT is Essential Variable. Refer QW 407.2 i know that maximum holding time of PWHT of WPS = 1.25xPQR. So How about Minimum Holding time? We afollow record in PQR or follow ASME B31.3, 1 hours/in.

Hi Edstainless, If we qualify with minumun heat input, Ferrite content shall be increased 65%. I think the best heat input within arange 1-1.5Kj

Dear My Friends, My project have to qualify 1 PQR between Super Duplex A790 UNS 32750 to Super Duplex A790 UNS 32760. Mechanical test require: 1. Pitting Corrosion at 40 Degree (No Pitting) 2. Range Ferrite: 35-65%. 3. Max Hadness 350 HV10 I am wondering which consumable we...

In case thickness CS above 19mm, we need to perform PWHT or not. (CS A106 thickness 25mm)

I have Pipe CS A106 thickness 25mm + 3mm Overlay 316L designed follow ASME B31.3. I know that when we design ASME B31.3 all Carbon Steel material have thickness above 19mm shall be performed PWHT. But i don't know Carbon Steel + Overlay need to perform PWHT or not. What range temp PWHT? What...

Dear Sir, I don't know when we perform PWHT abobe the upper transformation Temperature. Normaly I see that PWHT at 500-600 Degree which below the lower transformation temperature.

Hi Friends, I intend qualify CSWIP 3.2 (Welding Inspector Level 2). Can you share to me some prepararion material. Thanks

Dear Sir, Do you have chart comparision between DNV Material Grade with ASTM or API. Pls give to me link. Thanks you

Dear Sir, Do you have chart comparison between DNV Material Grade with ASTM or API...Can you give me link to download.

Dear Sir, I have 1 PQR with thickness base metal 25mm, No require CVN, Have PWHT, Qualified follow ASME IX. So i can develop 1 WSP with max range thickness 200mm with the same Temp and Holding time PWHT in this PQR.

Dear Metengr, Why CTOD test can be avoided when we performing PWHT, What is root case.