Recent content by stanweld

Low sulfur steels which have < .005% S are readily available. If you specify S < .015% you can easily get S < .010%. If one has a heat analysis showing .003% S and it is true, there is no way that the same heat will have .015% S. Such disparity, would be indicative of major problems with the...

QW-403.6 is applicable to impact tested procedures. QW-451.1 pertains to your PQR. You will need to qualify your procedure for .012" to .024" on .012" thick base materials. Impact testing will not be required for such thin materials. Review ASME B31.3 or ASME VIII, as applicable. There is no...

Sometimes HR does not work for the companies best interest; it works for HR's perceived best interest. The greater the turnover, the greater their perceived need. Of course management must drink their Cool-Aid.

Is this a corner groove weld or a butt weld? Is the flange cast or forged? Is the crack in the HAZ or at the fusion line?

You also need to address the requirements of the material Specification and whether one or both of the MTR's heat analyses was based on product analysis. Finally, was the MTR provided by the mill (steel manufacturer) or the Warehouse suppier, importer or exporter?

ifeanyi2013, Based on your query, you have shown no real knowledge of welding, welding procedure qualification, welder qualification or the construction/manufacturing Codes governing welding. You need further education and mentoring by experts in welding and the applicable...

As weldtek is telling you, QW-408.5 - addition or deletion or a change in backing gas is a nonessential variable under QW-256 for the P No.8 base metals and A-8 filler metal involved.

Fecralloy and Nicralloy have very high oxydation resistance at 1000C.

Temperature is too low for graphitization. Improper pulsing (pulse rate) can readily lead to subsurface porosity in pulsed transfer GMAW process.

Assuming the weld filler metal is the same, you will need qualify 4 impact test coupons.

Very small patches can lock in considerable stress, which could prove detrimental in a particular service environment. There is no such problem with a relatively large patch properly tied in at the corners.

Not enough info; however, most 347H is used in a high temperature environment (generally > 1000F) and the selection of ERNiCrMo-3 would not be recommended, especially if service invoves thermal cycling.

Also agree with LittleInch and BigInch. Where fresh water is at a premium or essentially unobtainable, sea water and brackish water have often been used without damaging the pipe system. Colorado River Water can be over 1000 ppm Chloride.

You will not find it in B31.1, B31.3, B31.4, B31.8, etc. I have seen a number of Owner/Engr specs that limit chlorides to 500 ppm in hydrotest water for carbon and low alloy steel pipe systems.

I trust that you are not hydrotesting 40 year old non-boiler external piping at the original test pressure.