ASME VIII Div1 Question

Date 09-02-2015 19:25

Does this code cover non-metallic and flexible materials of construction. (think of a giant rubber balloon). I have read the intro/scope about 4 times and I can't convince myself that it does or does not. Main Parameter seems to be 15 psi, and there are some exceptions for water heaters and small diameter vessels (6" i think)

By In Tension (**)

Date 09-04-2015 02:50 Edited 09-04-2015 03:20

I've never seen, heard, or read about any such wackiness in Section VIII, but I'm far from an expert. Is the flexible material to be the shell or a liner? What's the material? Many plastics fall under Section X. I believe there are also flexible/expandable vessels under ASME PVHO-1.
The quickest way to disqualify your "vessel" from the Section VIII, in my opinion, is through material requirements.
Skip the scope and read ahead to Part UG-Materials and descend the rabbit-hole. In a nutshell, only materials listed in ASME Section II and used in conjunction with Subsection C of Section VIII may be used. There are many exceptions and exemptions, many of which will be referenced in UG-4. What's your application, out of curiosity?

By fschweighardt (***)

Date 09-05-2015 00:04

Big rubber tank full of liquid, like a military fuel bladder