The Laundry Forum

[IronMan]

Steam pressure is not included in the calculation of the heating surface. Steam presure is a factor when determing what level of certificate is required. The two main categories are Power Plants and Heating Plants. Laundries fall into the Power Plant category.

[bloodgutsandglory]

Have never heard of these boilers. How many years have you had them ironman? What is the expected life span for them?

[IronMan]

Our boilers are four years old but we have another plant that has had them for ten years. Their life span will depend on how well they are maintained. Because there is no steam drum there is no thermal shock so we expect them to last longer than a conventional boiler. Yearly inspections have shown excellent results. These are the only boilers I have opened up and found nothing in the mud drums. The mud drums were so clean that you could see the reflection of the inside of the tubes. Vertical tube single pass boiler that makes the steam in the tubes. Very low mass boilers with no site glass or water column. Boiler inspectors do not know what to think when they first see them. The only way to do an internal inspection is with a See Snake.

[Reds]

Is anyone else using Miura boilers? Very effecient boilers with a small footprint and low Nox emissions.

I'm currently using a Miura Boiler. I'm having a problem with water leaking from the tubes. Was told that its very expensive to replace the shell. Does anyone have more info on the replacement of the shell?

[IronMan]

Are the tubes leaking at the front or the middle? The front tubes will be feasable to replace but if they are leaking in the middle it will be very difficult.
Why do you want to replace the shell?
How old is the boiler?
Have you contacted Miura about this issue?

[Reds]

I don't know to much about the boiler. I was told the tubes are leaking from the middle. They wanted to do a hydra test, but decided not to for fear of making the leak worse. They also said don't turn off the boiler because the settled water could put out the flame, them making it almost impossible to restart. We had to shut it down for 30 min. It took a long time to restart.

[IronMan]

In our jurisdiction we would have to report this failure to the local pressure authority and the boiler would be shut down until repaired and inspected. You are taking some serious risks by operating a pressure vessel in this condition.