Can I Make my Own LWN Flanges from Bar?
Can I Make my Own LWN Flanges from Bar?
(OP)
Can I make my own 316 SS Long Weld Neck Flanges from SA-182-F316 Round Bar?
If not, why?
The main reason I want to make my own is due to the long lead time on these items!
Thanks.
If not, why?
The main reason I want to make my own is due to the long lead time on these items!
Thanks.





RE: Can I Make my Own LWN Flanges from Bar?
how long a delivery are you talking about and what sizes?
we get pretty quick service here with small ones in stock and large ones or long ones....like 18-20" in a few weeks.
RE: Can I Make my Own LWN Flanges from Bar?
RE: Can I Make my Own LWN Flanges from Bar?
No, you can't.
Please review App. 2-2 (d)(1): "Hubbed flanges may be machined from a hot rolled or forged billet or forged bar….."
App. 2-2 (d)(2): "Hubbed flanges [except as permitted at (1) above] shall not be machined from plate or bar stock material unless the material has been formed into a ring……"
Please note that you are NOT GOING TO BE ABLE to make your own 316 SS Long Weld Neck Flanges from SA-182-F316 Round Bar, simply because this type of creature does not exist!
Type 316 round bar may only be made of SA-479
RE: Can I Make my Own LWN Flanges from Bar?
RE: Can I Make my Own LWN Flanges from Bar?
How about making your nozzle neck from bar and attaching a standard weld neck flange on it?
You could probably use Code Case 2148-1 for the nozzle neck... http:/
Before you use the Code Case, you should first contact your AI and see if it is acceptable in the jurisdiction of installation.
RE: Can I Make my Own LWN Flanges from Bar?
Not that I would consider that approach, however, unless I was truly in a serious bind. Too much of the bar ends up as chips. This can't be cost competitive with a real LWN.
Regards,
Mike
RE: Can I Make my Own LWN Flanges from Bar?
I assume that the item you describe was made as "round product" acc. to SA-182 and was additionally "down certified" to SA-479 as well. Nothing is wrong with that.
Opposite direction path is quite problematic. Please see in Sect. II Part A ; Specification SA-182 ; 1.2: "For bars and products machined directly from bar, refer to Spec. SA-479 and SA-739 for the similar grades available in those specs. Products made to this spec are limited to a max. weight of 4540 kg……."
I would most seriously doubt about the reliability of the certification for a bar (especially from stock) that appears to be "SA-182".
Just reminding you that App. 2 prohibits machining of Hubbed Flange from bar.
App. 2-2 (d)(2): "Hubbed flanges [except as permitted at (1) above] shall not be machined from plate or bar stock material unless the material has been formed into a ring……"
Best regards
RE: Can I Make my Own LWN Flanges from Bar?
Regards,
Mike
RE: Can I Make my Own LWN Flanges from Bar?
Answer: No."
RE: Can I Make my Own LWN Flanges from Bar?
regards
rhg
RE: Can I Make my Own LWN Flanges from Bar?
Perhaps if you call the LWN a designed flange and merely give it exactly the same dimensions as an ANSI LWN you can get away with it!