[MW:25182] RE: 25179] Pipeline hydro test sectioning.

Hi,

 

For pipe line HT (Hydro test) section might be as small as to 1 joint, and maximum length shall be govern by respective codes & standard.

Further Pipe line section will be depend on so many parameters … few of the key points to be noted while finalizing the section length of the pipe line are

 

1.       Maximum and minimum elevation levels in the pipe line..(will Impact pressure difference)

2.       Design pressure, test pressure, working pressure's

3.       Pipe line design - factor of safety.

4.       Application of line (water, oil, gas, crude and etc)

5.       % of SMYS considered for design.

6.       Temperature variations.

7.       Crossings covered in the section

8.       Code / standard following..

9.       Testing medium…

10.   Duration of test.

11.   Pipe line status – buried, or open, or covered etc…

12.   Provision of water sources and draining.

13.   Type of joint inspection (ex if 100% RT was done, we will go for longer sections, if no NDT is offered in joints – better to limit for small sections, as if any defects identified, dewatering the entire section will be difficult)

 

Permanent or temporary flanges and all are not the criteria – in general it will be planned for a HT header, which include water filling facility, pressurization ports, measurement ports and etc…

Header will be either flanged or welded type, and flanges are also like that either a permanent or a temporary – there is no limitation.

But due care has to be taken, that after HT – no more welding's are advisable.

 

And location of the flange will be as per your section…

 

Thanks & Regards,

Lakshman Kumar B,

Project Manager.

 

Mob - +91 9440031459.

Email –lakshmankumar4@gmail.com

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of ???
Sent: Monday, August 01, 2016 11:22 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:25179] Pipeline hydro test sectioning.

 

 

Does any specific requirement for hydro test sectioning method?

If pipeline is going more than 100 KM how do we handle the hydro test?

I suppose it is not possible to test one time due to the cost and time.

 

My question is as below;

1. The permanent flanges are required for sectioning for test? Or normally it is done by temporary flange?

2. If we need permanent flanges for test, how can I choose the location of flange?

 

 

--
http://www.linkedin.com/groups/MaterialsWelding-122787?home=&gid=122787&trk=anet_ug_hm
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To post to this group, send email to materials-welding@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/1d0888f3-0736-4206-a148-b76447ca867b%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.