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ENGRANIA

ENGRANIA

Mechanical
Dec 17, 2008
34
It is required to replace the old firetube A-106gr. B WITH PIPE API 5L (IN STOCK ) as a material for firetube for heater treater (vessels that contain liquids produced from wellheads. Heat is introduced to the liquids through the use of a natural gas or hydrocarbon liquid burner that is mounted inside of a flanged firetube assembly that projectes into the vessel. The firetube assembly typically consists of a flat, round or obround pressure retaining cover (one of the vessels main bolted closures) that is penetrated by a U-tube which houses the burner and directs combustion gases to a vertical, atmospheric exhaust stack external to the vessel).
IS IT ALLOWED ???
IF NOT , what is the recommended material for the firetube ???
 
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You may verify the existing vessel design drawing and Code doc, such as ASME BPVC, for the proper material of the firetube of the Heater, and confirm it with the pressure vessel Inspector for the material replacement. I am not sure that API 5L pipe is qualified as SA106-B fire tubes used in the Heater.
 
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check the project design of your equipment A106 Gr B is a better material than API 5l
 
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API 5L is not allowed in Sec VIII Div. 1
I have built many of these, all firetubes were SA-106B.
 
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ENGRANIA ...

When you ask: "Is it allowed" ? it implies that you have no rules at all and you are asking anyone for any advice.

The choice of a code of construction or repair is important ... It sounds like you are trying to repair/replace the tubes in a fired heater... Some background:

Fired Heaters, often referred to as furnaces (direct fired heaters), are thermal equipment often used in processing facilities to heat gases or liquids up to a desired temperature. Fired heaters in the petrochemical and refining industry are critical pieces of equipment that can have a major impact on process unit safety, reliability, and economics. They are complex pieces of equipment, where tubes and other pressure boundary components might fail due to relatively short periods of upset conditions.

The construction and design of fired heaters are governed by the API STD 560 or ISO 13705 standards. Their inspection is covered by API RP 573.

Within these standards are lists of allowable materials to be used for heater tubes ...



MJCronin
Sr. Process Engineer
 
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