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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.

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14y ago

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Related Questions

Is an h stamp a forever stamp?

No, it is not a Forever Stamp.


What is boiler welder?

Someone who holds of an "R" stamp as required by the ASME


What has the author A H Stamp written?

A. H. Stamp has written: 'Penrhyn Bay'


How do you know if you have a make up rate H stamp or a 33 cent H stamp?

Look for the words 'The "H" Rate make up stamp." It has a picture of a rooster on a weather vane.


What is the value of a stamp with the letter h on it?

The H stamp was the one with the Hat on it. It has a face value of 33 cents.


Can you use an H stamp and 1 cent stamp to make 34 cents?

The H stamp is worth 33 cents. Yes, you can add a 1 cent stamp to cover 34 cents worth of postage.


Can the h rate postage stamp still be used as a one cent makeup stamp?

From pe.usps.com they have pictures of the stamps. An H rate stamp with a HAT is worth 33 cents, and an H rateMAKE-UP stamp with a picture of a Rooster is worth 1 cent. Please look for yourself.


What has the author Edward H Spire written?

Edward H. Spire has written: 'Adventures in stamp collecting' -- subject(s): Stamp collecting


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


What is Value of the H stamp?

33 cents if unused.


How much is an H postage stamp worth?

The value of the "H" Rate First Class stamp is 33¢ as per official United States Post Office information. The "H" Rate Make Up Rate stamp is 1¢. Check for the additional wording so that you know which one you have.


Who was H E Harris?

H. E. Harris was a famous American stamp dealer. He began his business as a boy in 1916 and built the largest stamp firm in the world. His company exists today as a publisher of stamp collecting albums for collectors.

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