P22 Piping Welded With E7018

You answered your own question. It's wrongly welded high pressure steam. Would you send your oldest son to work around it?

You would be an idiot if you take this system into service.

P22 pipe needs specific welding procedures, you are talking about 500 deg. C steam,this is high pressure steam.

In Europe this means the job must be supervised and apprioved by a proper legal authority, otherwise you must not even considder to take this system into service.

What Henk and others have said said is completely right.

Steam is one of the very nasty but relatively (not still not quick enough!) quick ways to die in this world.....I was in the RN for many years on steam ships......there was occasionally an accident.

If you put this system into service, we will probably read about the "accident" on a World News broadcast shortly afterwards........

Also, you appear to employ the wrong people to do the welding, someone with proper training for steam would never have made such a mistake.....

You yourself cannot be an engineer, or you would NEVER have even asked us, you would have simply known.......a bad weld is a bad weld and it may not be used.....

So to answer your question fully then:-

I am shocked that this post even exists.

Ron

engineer or not it is smart to question an issue that is safety oriented. i agree with what everyone has said. and now that is in public domain if there is an accident than you,your company will most likely be sued. so i would let those in power of your company know this and now set out to find a qualified welder that is trained in the welding of steam pipes. to many people have been killed or maimed for life due to inadequate planning. repent, repent, cut and weld and sin no more.

You are seemingly missing the point, which is probably why you answer under the name guest.......

They should a) have never allowed such an error to occur, they are missing both a qualified "steam" welder and the correctly trained management to oversee the work and make sure its done correctly.......

b) If they have such a question, it should be answered by a Government department or similar, or even another welding company working as advisors.

What if we had all said "yeah, go ahead, no problems......". I do believe this OP would have done just that!!!!!! DISASTER!!!

THATS THE PROBLEM!!!

RonClark said it PERFECTLY!!!

P22 is a chrome/moly steel that requires special procedures and filler metals to successfully weld. Although more forgiving than its replacement P91 the joint in question as welded may fail catastrophically. I would strongly recommend removal and repair PRIOR to full pressure service. Even if this joint passes hydro testing it likely will not survive full pressure at specified temps.

P22 is a chrome/moly steel that requires special procedures and filler metals to successfully weld. Although more forgiving than its replacement P91 the joint in question as welded may fail catastrophically

Thats not the question here. I have been in this business for > 40 years and have worked with everything from waste water to in process nerve gas (JACADS). The question , as i see it, is the qualifications of the person asking the question? If they have to ask ,something such as this, then they are not qualified to be performing or being even associated with the operation.

Nothing intended, its just having to have been on as many falt analysis as i have and seen the un-necessary loss of life and injuries that have occured, i have to question the qualifications of the person making the original post.

Ron

GA

Wow! How could this mistake even happen?!? During my experiences with steam repair, improper material was not even allowed on the job site, let alone near the actual welding.

Too many accidents have happened to let this one go by unreported.

I hope this person does the right thing!