Hydrotest pressure criteria

[nishant nair]

Why hydrotest pressure is taken 1.3 times of design pressure? What is the criteria that fixes the term 1.5 times or 1.25 times, etc.??? Thanks in advance, Nishant nair Sent from Yahoo! Mail

[Avishek Dubey]

nishant when we conduct the hydro test for the first time we go for 1.5 times the rated pressure and there after we go for 1.2 times rated pressure

--
To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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-weld...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

[Biplab Pal]

What is your equipment?

--

To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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-weld...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

--

Thanks & Regards
Biplab Pal
Welding Inspector

E-mail:   bipla...@gmail.com
 
Information in this email and any attachments is confidential and intended solely for the use of the individual(s) to whom it is addressed or otherwise directed. Please note that any views or opinions presented in this email are solely those of the author and do not necessarily represent those of the Company. Finally, the recipient should check this email and any attachments for the presence of viruses. Myself accepts no liability for any damage caused by any virus transmitted by this email.
 

[Kristian Lund Jepsen]

The hydrotest requirements are given by the largest of:

a)    Design standard requirements (ASME B31.3, ASME VIII, PD 5500, EN 13445, EN 13480, etc.

b)    National pressure equipment regulations.

 

Older – now outdated - Danish regulations required 1.3 x design pressure.

 

ASME typically 1.5 x pd x (fy/fy,t) – fy: Design yield stress at room temperature, fy,t: Design yield stress at design temperature)

(pd is the design pressure)

 

The PED (Pressure Equipment Directive) in Europe as well as EN 13445 and EN 13480 reguire the largest of:

a)    1.43 x Design pressure

b)    1.25 x design pressure x (fy/fy,t). – fy and fy,t as above.

 

In Europe the PED requirements are now implemented in all national regulations.

 

regards

Kristian

--

To post to this group, send email to

material...@googlegroups.com

[nishant nair]

Hi avisek.. Thnx for reply.. but I wud like to further clarify my question. Its dat I want to know as wat is the base on which this 1.5 times or 1.25 times r fixed? Not in terms of new or old equipments but y 1.5 times.. y not 2 times or 1.4 times or 1.2 times. Y dey have fixed the values to that no. only.. wats d basis?? Well its written in code is not the answer m looking for.. Sent from Yahoo! Mail on Android

---

From: Avishek Dubey <avish...@gmail.com>;
To: <material...@googlegroups.com>;
Subject: Re: [MW:17574] Hydrotest pressure criteria
Sent: Sun, Apr 28, 2013 7:22:22 AM

nishant when we conduct the hydro test for the first time we go for 1.5 times the rated pressure and there after we go for 1.2 times rated pressure

[para...@gmail.com]

Dear Nishant,

The pressure vessels build as per ASME Sec.VIII Div.I year1999 editions or earlier follows the hydrotest pressure of 1.5 times the MAWP.

Any vessels construction following after the 1999 editions follows the hydrotest pressure of 1.3 times the MAWP (maximum allowable working pressure).

The reason for using or changing the factor 1.5 to 1.3 is quite logical.

Suppose you are fabricating a pressure vessel of Carbon steel plate confirming to SA 516 Gr. 60 (I.e. specified minimum ultimate tensile strength of material 60,000 psi) then by applying factor of safety of 3.5 which is based on vessel constructed earlier than 1999 code you have design stresses of 60000/3.5=17,142 psi.

Now you are fabricating the vessel by following later editions I.e after1999, where the factor of safety has changed to 3.0, then in this case you have a stress value of 60000/3.0=20000 psi.

Now if your vessel design temp is 300℉ ( The Allowable stress for SA 516 Gr. 60 at 300℉=18,900 psi) now you are hydrotesting the vessel built by both the editions of the code the you have

For 1999 edition or earlier:
Hydrotest pressure =1.5*MAWP* stress at test temperature / stress at design temperature.

=1.5*MAWP* 17142 / 18900
=1.36 MAWP.

For later editions:
Hydrotest pressure =1.3*MAWP* stress at test temperature / stress at design temperature.

=1.3*MAWP* 20000 / 18900
=1.37 MAWP.

Which are almost the same.
Thus by following any edition of this pressure vessel construction code the hydrotest pressure remains the same.

I hope I have satisfied your queries / doubt.

Regards,

PARAG PANSARE.



Sent from my HTC

----- Reply message -----
From: "nishant nair" <nishan...@yahoo.com>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Subject: [MW:17573] Hydrotest pressure criteria

Date: Sat, Apr 27, 2013 19:02

[joydev dalai]

Dear sir,

The hydro test pressure is decided as per the content inside the pipe & design of the system. In general for gas line the hydrotest pressure is 1.5 times of the SMYS. And for liquid line 1.25 times of the SMYS

SMYS - Specified Minimum Yield Strength

Joydev Dalai

Sr.Engineer 

QA/QC

     

--

Thanks & Regards,

JOYDEV DALAI

KPTL-MHBPL

QA/QC Department

Mob:- 9972058662

[هليل العتيبي‎]

Gent's

If we have a plate heat exchanger do need to reach theses values?

Regards

Sent from my iPhone

[Tim Lim]

Hi Parag,

Can you recall when exactly was the switch from 1.5x to 1.3x made? Which Edition or Addenda?

Best regards,

Tim

[Bhave, Suyog]

Dear All,

 

I am currently working on project located at UK which requires compliance to PED (Pressure Equipment Directive) norms.

Can anybody have reference where I could find the details of PED related to PIPING engineering.

 

Also, is there any impact testing criteria specified in PED which is different than American codes.

 

Thanks in advance for your help.

 

Best Regards,

Suyog Bhave

This message, including any attachments, may contain confidential and privileged information for the sole use of the intended recipient(s). Review, use, distribution or disclosure by others is strictly prohibited. If you are not the intended recipient, or authorised to receive information on behalf of the recipient, please contact the sender by reply email, and delete all copies of this message. While we have taken reasonable precautions to ensure that this message and any attachments are free from viruses, we cannot guarantee that they are virus free and accept no liability for any damage caused by this message or any attachments. Messages sent or received through our networks may be monitored to ensure compliance with the law, regulation and/or our policies.

[lalit malpure]

PED is having some different hydrotesting  factor. for Impact test refer ASME sec II A along with ASME B31.3

Regards,
Lalit
Graphite ind.ltd
nasik

Sent from RediffmailNG on Android

From: "Bhave, Suyog"Suyog...@petrofac.com
Sent:Wed, 28 May 2014 13:00:22 +0530
To: "material...@googlegroups.com" material...@googlegroups.com

--

> To post to this group, send email to material...@googlegroups.com
> To unsubscribe from this group, send email to materials-weld...@googlegroups.com
> For more options, visit this group's bolg at http://materials-welding.blogspot.com/
> 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-weld...@googlegroups.com.

> For more options, visit https://groups.google.com/d/optout.
>

Get your own FREE website, FREE domain & FREE mobile app with Company email.

Know More >

[veera raghava kommisetti]

PED allows use of ASME code for design and construction and as such rules of ASME applies for Impact.

You can get additional requirements for compliance to PED in EC directive. Notified bodies will guide you in this respect.

--

To post to this group, send email to material...@googlegroups.com
To unsubscribe from this group, send email to materials-weld...@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
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-weld...@googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

[ARUNABH BERA]

Dear Nishant

Hydrotest pressure is code specific. As per IBR and ASME B31.1, it is 1.5 times the design pressure, howver as per ASME B31.3., it is MINIMUM 1.5 times the design pressure and a provision of temperature correction factor has to be multiplied when hydrotesting High pressure piping

Regards

Arunabh 
Engineers India Limited

[Aly]

Dear Suyog, General PED Requirements   Materials impact tested @ 20°C 27J   Ali     -------Original Message-------

From: lalit malpure Date: 05/28/14 13:24:20 To: material...@googlegroups.com

[Bhave, Suyog]

Thank you for the reply.

If anyone have more information regarding where exactly the impact testing values are specified in PED and are these differ as per material.

I know the directive PED 97/23/EC, however the requirements are very general.

 

Is there any BV member of our group can guide me in detail. Thanks.

 

Best Regards,

Suyog Bhave

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of veera raghava kommisetti

Sent: Wednesday, May 28, 2014 17:28
To: material...@googlegroups.com

[george....@gr.bureauveritas.com]

Do not rush with the PED.
I would suggest that you download the PED and the relevant Guidelines and that you study carefully the Annex I section 4.1a and Annex I section 7.5 and the  guidelines 6/12, 7/17

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor


I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS HELLAS

Tel: +30 210 40 63 113/4
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04
(See attached file: Dilintas_George.vcf)

"Bhave, Suyog" ---30/05/2014 07:10:51---Thank you for the reply. If anyone have more information regarding where exactly the impact testing

This message contains confidential information. To know more, please click on the following link: http://disclaimer.bureauveritas.com

[Kristian Lund Jepsen]

You should refer to the PED Guidelines (make a Google search on that), which is a 255 page document from the EU Commission.

It does not state directly the 27J, but 27J is a common used criteria in European materials (EN materials). Also your WPS’s should be qualified to show compliance with that requirement, but that will come automatically because your WPS’s will need to address that they comply with PED 97/23/EC.

There are no impact test requirements on austenitic stainless steel – se guidelines.

 

You will find in the guidelines, that you need to have “Particular Material Assessments” (PMAs) made for non-European Materials, these should be verified by your selected Notified Body for the CE-marking.

 

For information: It is rather limited what your Notified Body may guide; their role is not to guide but to verify (and basically they cannot verify that they guided correctly themselves).

 

 

Yours sincerely

Kristian Lund Jepsen

 

M. Sc. Mech. Eng.

Senior Chief Consultant

Piping & Mechanical

 

D +45 - 51617324

M +45 - 23402936

k...@ramboll.com

________________________________________

 

Ramboll

Willemoesgade 2

DK-6700 Esbjerg

Denmark

www.ramboll.com

 

DK reg.no. 35128417    

 

[Alan Denney]

1                     The document you have to comply with in the UK is not the ‘Pressure Equipment Directive’ which is a document prepared by the European Union which has to be enacted by the national governments into their law. The document you have to comply with is the enactment of that into law in the UK which is Pressure Equipment Regulations 1999 (SI 1999/2001) (PER) PER came into force on 29 November 1999 and was amended by SI 2002 No 1267 which came into force on 30 May 2002.

2                     I attach a useful guide which tells you what the PED and PER are all about. Apart from correctly identifying the hazard categories you must also ensure that there is the correct level of third party approval, surveillance and approval of design and fabrication documentation and site supervision. Your company can end up with rejected work, or in extreme cases in court if you get this wrong.

3                     PED and PER do not go down into the detail of Charpy requirements. They are not codes of practice. The equipment has to be designed and fabricated to an appropriate set of codes and standards for the particular pressure vessel type.

 

Best wishes

Alan Denney

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of veera raghava kommisetti
Sent: 28 May 2014 12:58
To: material...@googlegroups.com
Subject: Re: [MW:20911] Pressure Equipment Directive(PED) - Impact Testing

 

PED allows use of ASME code for design and construction and as such rules of ASME applies for Impact.