High Temperature Water Boiler

[rstofer]

We have electrically heated devices that produce hot water with a temperature on the order of 500F and pressure on the order of 1000 psig.

The State Of California doesn't give a great definition of "boiler" but some states specifically include hot water in the definition. Creating steam is not a requirement.

The questions are these: from the operating conditions are these devices "High Temperature Water Boilers"? Second: does ASME Section I apply? FWIW, the "boilers" are 1" nominal 316 SS tubing with cal rod heaters. Under ASME Section VIII they might be exempt based on pipe size.

My unqualified opinion is that these are Section I boilers but I am looking for more qualified information.

Thanks!

 

[prex]

Yes they are indeed high temperature water boilers according to the definition in ASME I (p>160 psi or t>250 °F).
And I agree with you: they are within the scope of application of ASME I.
Of course if one of your boilers was formed by a single 1" pipe, this conclusion would be a little odd, but it shouldn't be difficult to comply with code rules either... prex

http://www.xcalcs.com

Online tools for structural design

 

[aclark]

You should also take a look at PG- 5.5 as well as PEB 5.3 of section I reguarding the use of austenitic stainless steel.