Is it necessary to conduct supervision and inspection for water-jacketed furnaces?
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This post was last edited by gn_1984 on 2019-12-12 at 15:38. Dear marine friends: I am currently dealing with a tubular heating furnace designed in accordance with SY0031-2012 and SY/T5262-2009. See attached figure. Process data description: The shell is at atmospheric pressure, uses water as the medium, and the temperature is below 90°C ； The pressure inside the fire tube (inside the coil) is 26 MPa (high pressure); the gas contains hydrogen sulfide and the temperature is 100°C. The diameter of the fire tube is DN150. Question: Have devices with a similar structure been manufactured before? Should this product be classified in a certain category and subject to the regulations set out in TSG 21-2016? Please provide the relevant basis. Thank you
You guys have taken on quite a variety of projects already; you haven’t worked on tubular heating furnaces yet. However, I can give you a little useful advice: you might want to take a look at the standard SHT3036-2012 \"Tubular Heaters for General Refining Units.\" Your design seems quite similar to the structure described in this standard, so it should be helpful. I’m attaching a screenshot for you
Thanks, ha. There’s nothing I can do; the company is expanding its business, so we have to go through with it despite the difficulties. It’s the first time I’ve encountered this situation as well.
There should be a pipeline connecting to the natural gas line and leading back to the burner on the left side. This has been done before; the necessary procedures should be in place. It seems that the procedures related to the boiler were handled back then
This post was last edited by guoshu258 on 2019-12-19 at 13:59. Jacketed furnaces and tubular heating furnaces are two different things; jacketed furnaces do not require supervision during manufacturing. Extremely strict requirements apply to the fabrication of the high-pressure sections in such furnaces, and it is usually required that the manufacturer possess A1 certification. The welding of the coiled tubes is a task that not even ordinary welders can handle. Moreover, this system also involves hydrogen sulfide, so a lack of professionalism can lead to serious safety hazards
The internal pressure in the coil is 26 MPa (high pressure); it contains hydrogen sulfide-containing natural gas, and the temperature is 100°C. The diameter of the fire tube is DN150. According to the codes related to solid and fluid properties, this coil is classified as Category II. It is also subject to supervision and inspection in accordance with the codes for pressure pipelines. There is no basis for claiming that it is not subject to such inspection.
This flue pipe of yours is probably for smoke, right? The diameter of coils used for natural gas isn’t that large; even for coils with a DN150 rating, the inner diameter is less than 150, so they don’t fall under the regulations for such pipes
Mm-hmm, thanks for the reminder. It’s a DN150 nominal diameter; due to the high pressure, Φ168.3x10 pipes were chosen. According to the regulations regarding fixed capacities, the inner diameter must be over 150 mm, so this approach perfectly avoids any inspection requirements. :handshake:handshake
I understand, no inspection. Based on: Fixed-volume code P2 1.5 – Scope of application not applicable (6) Steam heating coils in atmospheric-pressure vessels, tubular heating in process units. It meets the requirements for tubular heating in process equipment, so no inspection is required.
We have manufactured such equipment, with the housing at atmospheric pressure and the coil designed for a pressure of 2.5 MPa. No supervision is required