I believe that you can have a full penetration weld that is not completely fused and it can still be acceptable.ASME B31.3 table 341.3.2 gives limits of allowable imperfections, therefore a full penetration weld that was not fully fused would be acceptable under limitations placed in 341.3.2...
If the contractor that completed the work insists that he followed procedure, then i would respectfully suggest that you insist that he demonstrates compliance to approved procedure by objective documented evidence. Simply saying verbally, i followed procedure without having any documentation to...
You ask whether seam welding or MIG would be better.To weld a seam, you need a welding process,MIG is one of the welding processes,like MMA,GTAW,SubArc,FCAW,etc you have to decide what welding process is the most suitable for your line of work.
You dont say what process is being used at present...
Would you not be better to confirm that heat treatment is mandatory before looking for loophole in asme ix,has the code you are working to determined that pwht is required,or where is there a spec break between piping and tank? what is wall thickness of pipe,does owner requirements call for pwht...
While i agree with PWHT requirements i would not leak test as ASME B31.3 1999 edition,Para 345.2.3 Special Provisions for Testing, Para 345.2.3 (C) Closure welds states the following,
"The FINAL weld CONNECTING piping systems or components that have been successfully tested in accordance...
Welding1, following is information.
1.The pipe size is 26 in.
2.Pipe thickness is 17.4 mm
3.It has 2.3 mm thickness over required
4.Welding process is GTAW/SMAW
5.The fluid is natural gas saturated with water and miximum carbondioxide contents in the gas are 1.1% by volume.
The concern is with...
I agree with the comments of Mike Van Voorhis and i would like to give a different perspective from another section of the industry.
While i am not an engineer,(i am Construction/QA-QC),in the oil and gas, petrochemical and heavy construction, there is here,a serious lack of business and...
Boilerman/madmango,as a lead auditor and a QA manager,when i am auditing companies,my basic simplified premise is to see that 1, people know what their job functions and descriptions are,2 they are aware of the plans and procedures and know where to find them and 3, that these plans and...
I have checklists that i use,i am a lead auditor and also QA manager so i aware off both sides of the fence.Remember that it is the system that is being audited to ensure compliance and that conforming product is being achieved, and keep it simple. Let me know if you want any more information
I am looking for information on backwelding of duplex stainless pipe welds,along with all ASTM identification for duplex stainless steels and a location where i can find a WPS demonstrating this
