Piping and Valve Engineering: November 2009

To my understanding of 31.8, the distrbution and the processing units part of hte distr. shall all be in acc. with 31.8

You may not use 31.3. The thk calc. are fundamentally different though it is going to be within the processing unit.

If you deem the code 31.3 and 31.8 together will suit the reqt. You can get the clients approval in first place.

It is quit similar to the way of B31.3/31.1/IBR all going together as need based.

On the material aspect the code does not restrict the use A672 or API 5L. The general diff of C60 and C70 is that

it is made from A516 killed fine grain material. C70 is a higher tensile strength material than C60 so the chem comp. is

diff. Pl. loook into the ASTM for more info.

Regards,

Kannan

From: Raghuram <r.bathula@ticb.com>
To: piping_valves@yahoogroups.com
Sent: Tue, November 3, 2009 1:08:49 PM
Subject: [piping_valves] Re: Hi Friends:Need Advice on piping materials

you can use API 5L X65, basic allowable stresses are given in Table A-1

--- In piping_valves@ yahoogroups. com, "satish hingalkar" <satish_hingalkar@ ...> wrote:
>
> Hi all friends,
>
> We are doing Nitrogen distribution project in middle east,Project brief:Project is basically 48" N2 High pressure (600#) Pipeline and distribution to process units.
>
> 48" Pipeline of materail API 5L X65 with metering and filtering skid is comming to the battery limit of process unit,My query is that can we use same material (API 5L X65) by doing thickness calculation as per ASME B31.3 inside the process unit.Pl.advice me the requirement inside the process units or we have to use only ASTM Pipe A672 C60/70 cl.22.Also let me know the difference between the two materials.
>
> Responce will be appreciated.
>
> Thanks in advance.
>
> Regards,
> Satish Hingalkar
>