Recent content by quadswift

I have seen it written in project specifications as a minimum of 2x the wall thickness between HAZ edges. Regards Alan

I do not recall this being a requirement. Either do a 'google' or get hold of a copy of the regs. I am sure that if your procedures and qualifications were to code and witnessed by an independant third party then you will not have to re-qualify. From what I remember the regs were applicable...

It is unusual to have lost all the inconel to corrosion / erosion. There are usually some areas more prone to it than others.If you have lost it then I would think the medium will be through the c.steel much quicker. Has he done scans with normal probes in several areas? If so has he received...

The basic answer to your question is NO. Regards, quadswift

I would have thought that you as the purchaser would have developed (or had developed on your behalf) some strategy for your requirements. It is usual to consider design aspects of corrosion and material selection and provide some specifications and data sheets to issue to your potential...

We have been here 'n' times before on this site, on specifying, levels of inspection and material certification / verifiction. I always believe in dealing with any problem as near to the source as possible. You checking stuff to this level on receipt is not really acceptable. You need to - know...

See www.isixsigma.com/sixsigma/six_sigma.asp Regards, Quadswift

I thought the sequence was: - product and soil survey data - required design life - leading to material selection - and determination of coating type and thickness / required CP system selection Regards, quadswift

Thanks PVRV. There were only half a dozen cases and we have told them that they are unacceptable. Two were not too bad but it is difficult to come up with a precise criteria. I do not like rejecting things out of hand as it discourages people from bringing things to someone's attention...

We have bought our piping to ASTM and are installing, on a remote desert, site (which is where I am now) to B31.3. The planning is not too great and there is much pipe handling going. There was spool pre-fabrication off site in-country and there are numerous welding habitats dotted about the...

If it is critical, you should be use something like taper-lok flanges. Welding Units UK will be able to advise you on flanges and bolting. Have a look at www.welding-units.co.uk We have used them before and they do a good job. Regards, Quadswift

It is best to hard stamp the samples with your own stamp as they are cut. Stamp them in a place that will remain visible after preparation of the samples. Regards, Quadswift

There is also frequent reference (particularly with radiography) to 'centre-line shrinkage' where there is a small amount of concavity in the centre of the root bead area, due to differential cooling / 'shrinkage'. Not a problem as long as concavity is not out of spec and compensating cap /...

Is that where Rumsfeld stole his award-winning quote from? Quadswift

USJBH's comment reminds me. I remember in the 60's, watching a guy in a steelworks who was sorting some billets that had got mixed when some rail wagons had shed there loads in a shunting mis-hap in the marshalling yard. He had a small grinder and when he touched it on the billets he could...