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Yes weldstan, it's what I'm doing with Vendors. I asked for a double quotation, and on the same time I required a meeting with Client to discuss technical matter. I deem a double normalization not to be technically necessary (CVN Impact test shall be conducted at +5°C, 27J min.) so, a stress...

Yes Steve, we are at bid stage, nothing was manufactured nor any operation started yet. So, no problem to change pipes from ASTM A672 GR. C60 Class 32 to Class 22. Vendors have just to update the offer, nothing more than that. Regards, ES

@EdStainless Yes, of course Vacuum Degassing isn't the only parameter to control. Anyway interesting to know that you manufactured pipes with such a method. @SJones From this point of view, Client specification is little bit contradictory. From one side, it asks for Vacuum Degassing process, on...

Dear sirs, I kindly ask you about the following issue. I premise, I'm in an HIC environment, NACE MR0103 applicable. My Client requires all piping (seamless pipes, forgings, castings) to be manufactured during steel making with the Vacuum Degassing Process (aimed to lower Hydrogen content to...

OK sirs, thank you all for your valuable answers. So it's my understanding that Yes, it may be done a double normalization heat treatment without affecting mechanical properties, i.e. Tensile/Yield Strength, below applicable pipe specification, namely ASTM A672. Good to know! By the way, I'll...

Hi Steve, Client doesn't ask for any HIC testing, namely NACE TM0284. Nor they require plates specifically manufactured for HIC.

Dear Sirs, I'm talking about a Client Specification that requires an NPS 30 pipe to be manufactured as per A672 C60 Class 32 (i.e. Normalized) and, in addition, this pipe shall be made from a plate as per ASTM A516 GR60 Normalized!! Practically my Client asks for a double normalization heat...

The issue is that my Client Painting Specification prescribes to perform an adhesion pull-off test (in accordance with ISO 4624 or analogous ASTM) on a two layers (30 microns each) Silicone Painting System. Now, chimney Vendor states that adesion test cannot be performed. What's your opinion...

Hello, I asked during bid phase an ASTM A358 Class 1 pipe. The Vendor offered the Class 3 instead. The only difference is that Class 1 is a double welded pipe whereas Class 3 is single welded pipe. Both pipes are 100% radiographed. Any of you see any concern to accept this deviation, namely...

If in a given carbon steel, the silicon composition increases does it increase the resilience? Is there any relationship? Thank you all.

Please, can anyone let me understand the meaning of the Y factor in ASME B31.3 para 304.1.1? I mean, for "Y" I got two choices, a choice from table 304.1.1 (t < D/6) or by a formula (t >= D/6). But, how can I know if "t" is < or > than D/6 if I still have to calculate "t"? And then, in the...

What does it mean "dual grade" as a specification for a material requisition? My customer want me to use AISI 316/316L Dual Grade...but I didn't perfectly got the meaning. Unfortunately my colleagues too, even the material expert. Could you help me out? Thank you. Ciao from Italia! E.