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thank you. Thats what i thought

I notice lincoln machine for submerged arc welding has 2 terminal for positive and 2 for negative. Why the need for 2 terminal? Anyone can explain.

Table UW-12 column mention that angle joint can be design per U-2g for CAT B and C joints. Never mentions Category A. 1. So the question is does code allow angle joint CAT A for shell plate? 2. And if we do what kind of volumetric NDE and value of joint efficiency to be used? Thank You

i think you right. The code doesnt specify how much low temp we can use this material at. The note e basically say as long as it meet toughness requirement of applicable section then this stress value is usable. Thanks.

i cannot find any information from asme code regarding lowest permissible temp for any given material to be used for vessel fabrication. Maximum temperature is available on asme ii. Does lowest permissible temp depend solely on charpy impact or is it somewhere in asme code that i missed out.

Does that mean hot forming is better than cold forming??

Depends on how highly sought after you are. The more by the book you go with your potential customer, the lower your chances of winning the customer.

I had seen a few shortcoming because of a pressure vessel end user refuse to hire an experienced contractor for their pressure vessel jobs and end up doing it by themselves. Turns out they have to pay a lot more to fix their own mistake. Unless your organisation have an experienced personnel...

Does partial joint penetration is allowed for vessel build under ASME Section VIII Div 1.

it is an autoclave with loaded cages moving in and out of the equipment+pressure & hot temperature that cause the shell plate to be oval. The owner of the vessel are quite thrifty and he prefer to explore the repair option than replacing it with new one. Cost wise if we manage to repair it...

we have a client asking us to repair their pressure vessel that had been become oval in shape due to years of service. we had no idea how to do it since we never do it before. however one idea comes to mind which is removed all the shell plate weldment and rerolled the plate to flatten it back...

what is HFO?

ASME doesnt specifically mention how many time we can weld at the same spot.

The porosity shall be grind of before subsequent weld passes, that is of course the textbook way of dealing with weld defect. However i doubt that properly design equipment will fail just because of very minor porosity left in the weldment. Even most codes will tolerate some porosity/slag to a...

In one country the usage of EN10025 S275JR for PV pressure part is already forbidden. I have seen a steam service pressure vessel build using JISG3101 SS400 that already in service for 30++ years and still working fine.

So i can say that according to UW-14(a) i have no problem designing a vessel with extra large nozzle intersecting a category B(circumferential joint) and the code doesnt require fabricator to conduct any NDE. However for quality assurance some NDE should be conducted. Thank You

We have a vessel with large nozzle opening design according to Mandatory Appendix 1-7 that intersect a category B weld joint. Is requirement UW-14(b) regarding radiography apply to my situation? if not is there a requirement anywhere in the code that require any kind of NDE for the category B...

We need to design a vertical vessel with a cone section at the bottom. Problem is due to stress discontinuity at the cone to shell junction & reinforcement requirement, a stiffener ring had to be installed near the shell to cone junction. The stiffener ring now due to its position will obstruct...

The vessel is design according to ASME VIII using a software where the things like thickness, nozzle analysis etc is calculated to ASME. It is a door where the door is keep secured using a flange and lockring. Just like the door that is used in most autoclave. Those are the area where asme...