The equipment uses integral flanges; can the connection flanges be necked butt-welded flanges?
Thread Content
This post was last edited by FORREST_GUMP on 2016-12-6 at 16:40. Dear experts, may I ask: since the container connection uses a integral flange, can the connection flange be a necked butt-welded flange, or must it necessarily be an integral flange?
What type of flange is an integral flange?: o
No relevant provisions were found in the manual. I’m thinking that since the pressure, flow paths, and type of sealing surfaces are all the same, the overall flange and the butt-welded flange can be connected using bolts, but I’ve never dealt with this before, so I’m not sure.
It seems there is a type of flange called a equipment flange!
Difference between integral flanges and butt-welded flanges: Both necked butt-welded flanges and integral flanges use butt welding, and both have a long neck. How can one distinguish between necked butt-welded flanges and integral flanges based on their external dimensions and applications? In terms of appearance, the end of the integral flanged pipe is thicker than that of the butt-welded flanged pipe; except for PN1.6MPa and DN450 and above, the inner diameter of the integral flange is the same as the nominal diameter. The neck height of the overall flange is higher, and the wall thickness is also relatively greater, as can be clearly seen from the flange-related standards. In terms of applications, an integral flange is a flange that is connected to the equipment, such as the flange on a valve; this flange forms a single unit with the valve and is not joined by welding. Overall flanges are commonly used in equipment manufacturing, but are hardly employed in pipeline design. The necked butt-weld flange is used in conjunction with equipment such as valves and pumps, and it is welded to the pipeline; its rear interface dimensions match those of the outer diameter and wall thickness of the corresponding pipeline/part, allowing for direct butt-welding. Your device, what kind of device is it? Valves, pumps, or nozzles on containers? If it’s a nozzle, it shouldn’t be necessary.
The integral flange is similar to the welded flange with a neck; the only difference is that the integral flange has a long tail, allowing it to be welded directly to the equipment without the need for an intermediate pipe.
That’s the long-neck flange; some pipes use welded flanges with necks, and that shouldn’t be a problem, right?
There’s no issue with the connection dimensions between the two of them; it’s just that they haven’t done this before, so they’re not sure.
Thank you, Old Wang. This is the container connection pipe. What do you mean by it not being needed when not in use?
Use it first, and let us know how it works later;P