guidelines on manufacturing high pressure flanges 2

[branamanjames]

we are in the process of buying a 3 axis milling machine with hopes of making flanges for the oil and gas industry example;6 inch 600#,my question is,what sort of legal paperwork is going to be required if we sell these? Also who is responsible for MTR's?

 

[EdStainless]

You start by asking what specifications you will need to certify them to. There are a bunch so be ready.
You will need to buy all of the applicable specs, read them and understand them.
In many cases they will refer to raw material specs and testing specs. Buy those also and read them too.
Some flanges can be machined from plate, some cannot.
The traceability starts with how your quality system tells you to write your PO, what material and documentation is required.
In some cases you will use the chemistry and properties from the raw material MTR. In other cases you will have the RM MTR, a secondary product chemistry, a heat treat certificate, destructive mechanical testing, and then you can generate an MTR.

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P.E. Metallurgy, Plymouth Tube

 

[IQM]

This is a very general question, what material will be used? Stainless, low carbon steel, high yield material so when you know the material you need to know which specification applied to them. I agreed with EdStainless in all points

 

[racookpe1978]

Most high pressure flanges (fittings) need to be forged, not just "machined" to specific dimensions from "round plates" .. Be sure you can get the raw material forged and heat treated properly if you are not going to do that work yourself.

Once you "think" you understand the specifications, Order a few from the manufacturers already making them, see the documentation shipped with each flange.