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What is an h stamp on a boiler?

In: Industrial Engineering [Edit categories]

Answer:

American society of mechanical engineers has a classification of pressure vessels. Certain type of the boilers have H stamp according their classification, and this stamp is required by local authorities in order to get boiler approved for installation.

First answer by ID1153663507. Last edit by ID1153663507. Question popularity: 1 [recommend question].

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Relevant answers:

What is a H stamp?
It is worth 33 cents.
H class stamp rate?
According to the USPS web site the "H" rate stamp has the rooster on the weather vane and was a 1-cent make-up stamp issued November 19, 1998. H 33 cents 1/10/99 and the H makeup rate 1 cent
How much is the H stamp worth?
The H stamp with the hat is 33 cents. The H rate makeup stamp with the rooster is 1 cent.
Can you still use H stamps?
Yes you can and they are worth 33 cents as postage.
What is the value of H stamp?
33 cents if unused.