SA-333 Grade 6 as Pressure Vessel Shell Material Sec VIII

[david339933]

ASME Sec VIII - UCS-27 states that shells of pressure vessels can be made from seamless pipe but must be manufactured by the open-hearth, basic oxygen, or electric-furnace process. Using SA-333 Grade 6 pipe, how can I prove that this requirement has been met, if on the MTR it only says, "Melted and manufactured in the USA, no repairs by welding"?

 

[weldstan]

Go to the mill and ask. Essentially it will be one of the three, most likely only BOF or Electric Furnace.

 

[keyen]

By any chance, is the MTR dual rated for SA-53? Per the SA-53 specification: "4.1 The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric-furnace, or basic-oxygen".

 

[gtaw]

I seem to recollect reading that there are no open hearth still operating. That being the case, EF or BO are your options.

Best regards - Al