The description sounds to me like a square butt weld but there should be a depth of weld indicated, or seal weld indicated in the tail.  Without having information showing depth of weld or annotated "seal weld" it would indicate a full penetration.

Hojo,
I'm used to see tube to tubesheets seal welds, but this is the first time I see one like the one you describe.
The seal welds I'm accostumed to see are of three types:
1. The tube protrudes say 3 millimeters (or less in some cases) beyond the tubesheet and the end is square.
2. The tube protrudes say 3 millimeters (or less) beyond the tubesheet and the end is flare.
3. The tube is flush with the tubesheet but the tubehole shows a bevel of say 2 millimeters to accomodate the seal weld.

I can't imagine how you can make a sound weld if the tube has square ends, is flush with the tubesheet and the tubehole has no bevel.

And now I'm going to ask you a special favor. I've seen that you work for Graham. Would it be possible for you to have your Commercial Dept. send me some literature (catalogs, pamphlets, articles etc.) on the ejectors and barometric condensers Graham makes? Or alternatively, can you point me up to a site where I can find such a literature? I need it for my lessons at Mackenzie Presbyterian University here in Sao Paulo. Thank you.
Giovanni S. Crisi
Sao Paulo - Brazil