Hi Gents,
Pls see thi video in youtube: http://www.youtube.com/watch?v=UtVlSWCJJoE.
My project, we need to joint copper to copper by bazing capillary. This is the fist time i see this process. I dont have experience, Pls see this video and give me your advice:
1. Which method clean suface, how...
Hi Friends,
Our project had serious problem. All weld joint between Pipe-CuNi to Flange-CuNi had defect crack in Flange side (Pipe side no problem). I would like give you some information to you give me advice:
Base: CuNi
Thickness: 7 mm
Welding Process: GTAW
Welding...
Hi Friends,
Our project has one kind of materials is Carbon Steel-NACE. I know that this is a kind of Carbon Steel desgin with NACE standards. I checked in the ASME that it has no effect on PQR whether Carbon steel is NACE or not NACE. However, Client still insist that we must Re-qualify PQR...
Hi friends,
i have tubular OD=1100 mm, welding spiral (sloping 40 degree between axis tubular) accoding to ASME IX. I dont know position of this joint: 5G or 3G.. Pls give me advice.
Hi Friends,
We qualified PQR inconel UNS 6625 weld to low temp Carbon Steel (A333 Gr 6). All mechanicate passed except Root bend test. The defect lack of fusion at boundary have appeared manny time. We try many time but still similar defect.
Would like give some information for your study...
when we qualify PQR, we will record all the value of interpass in all pass (Root, Hot, Fill, Cap). We will choose the biggest value among all the value (called A) According to ASME IX, in WPS we will add more 56 degree to this biggest value of interpass, so Maximun interpass temperature in WPS...
Hi friend,
I have to weld CuNi to Carbon Steel (API 5L X52), Butt weld, thickness 5-7mm.
Which is welding consumable?
Which is Process (GTAW or Brazing..)
Which is parameter (Heat treament, Pre-heat.....)
Pls give me advice.
Hi Friends,
If you have a strange base metal, you only know tensile and chemical composition but you dont know AWS or ASTM Classification. Now, you have to weld this, you dont know the suitable electrode what will you do?
Example, I currenly have ASTM 1566 UNS G15660 but I dont know suitable...
Hi Friends,
My spec require hadness value 310 HV10 but The laboratory have been tested at HV5. My client reject this result and require to Re-Test hardness at HV10. I know that HV5 or HV10 is same result. You can share to me some standards or guide books to convert HV5 to HV10. Thanks you so much
Hi Friends,
Pls recommend to me good oxygen analyzer machine. I want to have good oxygen analyzer machine to inspection piping duplex Range oxygen 0-200ppm
Hi Friends,
I qualified welder SMAW+FCAW base metal 12.7 mm (3mm for SMAW, 9.7mm for FCAW) according AWS D1.1 so can I separate process SMAW and FCAW.
SMAW process: 6mm thickness. FCAW: 19.4 mm with backing
Hi firend,
Why in QW/QB-422 ASME IX not mention detail Minimum specified Tensile of A269 TP316. When I submit pWPS material A269 TP316 to my client, he reject pWPS. He said that: A269 TP316 can not use to qualify PQR. I don't why.
Dear my firend,
Spec my client require hardness test after PWHT for structure steel (WPS folow AWS D1.1). How to raise STQ to client waive this requirement.
Our welders had qualified API1104 with ER70S-6/E7018 but now He welded pressure vessels design by ASME with the same welding consumable as ER70S-6/E7018. He have good performance. We understand that don't have change about qualify of weld joint but Third party can not acceptable because it...
Hi Gents
we want to weld API 2W Gr 60, thickness 65mm with Suplex duplex UNS 32760 thickness 65mm. Follow recommend in some guideline book, API 2W Gr60 thickness 65mm must be do Min Prehear 150 degree. Super duplex Max interpass 100 degree. So funny question, Can we weld super duplex to API 2W Gr60.
Dear Gents,
We have one PQR: P.No 1 Gr.1 weld P.No 1 Gr.2 So Can we write WPS: P.No 1 Gr.1 weld to P.No 1 Gr.1, P.No1 Gr.2 weld to P.No1 Gr.2? Require CVN test, Follow ASME IX
