Non standard Transition Nozzle In Air cooled Hx

niraj_kuwait · **Posted:** Tue Aug 10, 2010 7:19 am

- If we formed Tr. Nozzle out of Pipe or plate do we still need to certify finally it as a Fittings.
In other words - Tr. Nozzle out of Sa516 gr70 or Sa106 gr b after forming DO we need to certify in Sa234?

-We are satisfying the UCS 79 calculations.
- Can we finally certified as Pipe or plate it self?

More on Process:

Tr. nozzle out of plate we formed in Cold conditions below 600 Deg.c.
It is circular from top and elliptical from Bottom.
Dimensions are Not listed any where in B16.9..
Minimum thickness and design we have carried out in house.

I really appreciate any input

darkrain · **Posted:** Tue Aug 10, 2010 8:50 am

certify in Sa234?

no, use it as original

this is no-so-called standard part,

no rule for this one

akonrad · **Posted:** Tue Aug 10, 2010 10:49 am

Niraj,
As far as I remember you work for a company that manufactures pressure vessels, not fittings. Why would you need to certify anything as a fitting then? Your book of spells is SecVIII-1 (I assume) and the only thing you certify is the compliance of your product with this very book. Yes, it probably meets a lot of requirements of different codes, it surely violates a lot of requirements from other codes, but it's not what you put into your U-1 form, is it?

niraj_kuwait · **Posted:** Tue Aug 10, 2010 1:05 pm

Thanks darkrain

Akonard Now i m working with company who is in Business of Air cooled heat exchanger manufacturing and designing.

Why i need to certify then Answer is or what my understanding is:

If you formed anything out of plate or Pipe the original properties does not remain same you need to provide specification of that new formed items.

Say for example if Pipe is alos originally out of plate but when you perform some operation of bending and welding it becomes ERW pipe specifications and no more it called plate.

Same in our case.

akonrad · **Posted:** Tue Aug 10, 2010 2:35 pm

Niraj,

Quote:

If you formed anything out of plate or Pipe the original properties does not remain same you need to provide specification of that new formed items.

Do you provide a casting certificate for your weld metal? It's not a wire anymore, it has been melted, hasn't it?

This is a common misconception. A pressure vessel is not a set of pipes, flat plates etc. It's a product, made of wrough materials, processed in various ways to make the vessel. They don't have to meet their original specs after processing. Such a requirement does not exist. Can you find it?

leemh · **Joined:** Wed Aug 11, 2010 10:10 am **Posts:** 2

niraj_kuwait wrote:

- If we formed Tr. Nozzle out of Pipe or plate do we still need to certify finally it as a Fittings.
In other words - Tr. Nozzle out of Sa516 gr70 or Sa106 gr b after forming DO we need to certify in Sa234?
As I know, all materials used in an air cooled HE shall be nominated with exact ASME Material Specification Number. Non standard transition nozzle (it is also called saddle-shaped nozzle) is also a nozzle with NPS. If this kind of nozzle is formed from SA-516-70 plate, so it shall be specified as SA-516-70; and if it is from SA-106-B, named SA-106-B

SA-234 SPECIFICATION FOR PIPING FITTINGS OF WROUGHT CARBON STEEL AND ALLOY STEEL FOR MODERATE AND ELEVATED TEMPERATURES
This specification covers wrought carbon steel and alloy steel fittings of seamless and welded constructioncovered by the latest revision of ANSI B16.9, ANSI
B16.11, ANSI B16.28, MSS SP-79, and MSS SP-95.These fittings are for use in pressure piping and in pressure vessel fabrication for service at moderate and
elevated temperatures. Fittings differing from these ANSI and MSS standards shall be furnished in accordance with Supplementary Requirement S9.

-We are satisfying the UCS 79 calculations.
- Can we finally certified as Pipe or plate it self?
Of course, transition nozzle material shall be certified as its original pipe or plate material.

More on Process:

Tr. nozzle out of plate we formed in Cold conditions below 600 Deg.c.
It is circular from top and elliptical from Bottom.
Dimensions are Not listed any where in B16.9..
Minimum thickness and design we have carried out in house.

I really appreciate any input

Non standard Transition Nozzle In Air cooled Hx

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