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Boilers are supposed to be pressure tested at 70F (see PG-99) to avoid brittle fracture concerns during hydrotesting. Pressurizing a boiler - from a practical perspective, you should be using nice warm BFW

Think of the longitudinal ligament as you would a longitudinal weld seam when applying looking at your circ stress. Circumferential stress is usually your limiting factor in cylinder design since it is twice your longitudnal stress (usually). So your longitudinal ligament will probably limit...

Canadian Standards adopt ASME for design and construction of pressure vessels as a general rule. While it is possible for the jurisdiction to have allowed design and construction to a different standard, in my experience these are special one of a kind cases (mind you I have not had any...

For those commenting about removing the insulation and monitoring with UT. If the line is inservice, the metal temperature will be -30C. Even a small UT port will ice over preventing effective UT scanning.

I agree with deanc. Contact the jurisdiction where the vessels will be installed and ask for their opinion. Where we are located, the jurisdiction would insist on having some input into the matter. I understand that this is not always the case, but if so, whatever agreement you reach with the...

Good point. I followed the normal standardization procedure for the analyzer (uses a 316 stainless steel calibration block). There is no mention of a special calibration for other alloys.

I have an old heat exchanger with supposedly zirconium tubes (grade 702). When I attempted to PMI the material, the results do not match the current ASME/ASTM spec for grade 702 zirconium. Specifically, the analyzer is reporting around 1 to 1.5% Moly and an iron content exceeding 0.5%. The...

That is what I thought. I know Section VIII is set up this way also. Thanks for the assistance. Millar

I was wondering if there is an interpretation regarding the application of corrosion allowance to the minimum thickness requirement of PG-16 of ASME I. This paragraph requires plates be 1/4" thick minimum and I am wondering if this is before or after any corrosion allowance is applied...

Does anyone have a contact where old codes can be purchased? I have searched the ASME web site but have not had any luck yet. Thanks,