Tuesday, January 31, 2017

[MW:26009] Impact testing requirements for ASME B 31.3


Dear Experts,


Please clarify my below queries regarding the impact test requirements for Piping.


1) 3 inch SA105N WNRF  impact tested at zero degrees( at mill) Celsius but MDMDT is 18o Celsius can we use this flange with respect to ASME B 31.3( if yes please detail the reference standard and up to what temperature we can use this flange)


2) SA 234 GR WPB (90 degree elbow) MDMT is -450 Celsius but impact tested at Mill is -290 Celsius, can we use this flange with respect to ASME B 31.3.



Thanks and Best Regards?

D. Santosh
Tel: +971502016960
United Arab Emirates




[MW:26009] WPS qualification; Repair of Duplex Stainless steel with inconel filler

Dear All
We have to do repair and weld built up on duplex stainless steel base metal with inconel filler (ERNiCrMo15; SFA-5.14) as suggested by Client. 
Process GTAW

We need to qualify a procedure as per ASME section IX on DSS Round bar of 40mm

Expected qualification.
All duplex base metal.
Weld repair thickness:all thicknesses
All diameter
All positons

Kindly advise 
1: Whether groove weld qualfication will be good option for it or any other option.

2: Whether PQR  testing is possible on round bar

3: Whether given Filler metal is suitable.

4: How to get side bend test specimen to comply Sec. IX

5: Any other test other than tensile and bend test to be done.

Kindly respond with reference to ASME Sec IX.

With best regards
Ahmad

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[MW:26009] Re: ASME IX - Welder's qualification Thickness range

Hi

Procedure qualification / Welder qualification


What is the different between Thickness Sec IX , API1104 & D1.1



On Wednesday, March 9, 2011 at 8:13:49 PM UTC+3, Tunisian Quality Engineer wrote:
Hi all,

  As per ASME sect IX table QW-452-1(b), for welder's qualified in test coupon thickness greater or equal than 13 mm, he's will be qualified to wed thickness " Maximum to be welded"

May my interpretation is true ??
In this case, Can i  qualify all welder's in 13 mm thickness, he will be qualified for all thick ( PWHT is not essential variable for welders) and cover all thickness range ?

Regards

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Monday, January 30, 2017

[MW:26000] Crack in Weld HAZ

Dear Experts,
Crack observed in Base material- IS 10748 gr 2 to EN45A(Tempered ).
Base material thickness-4 mm
Fillet size-4 mm
Welding process-GMAW
Filler Wire-ER70S6.

Experts need your valuable suggestions.

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[MW:26000] Re: Cross country pipeline hydro test

Dear Querist,

1) Why hydro test is carried out after covering / back filling the complete pipeline?

Logic :  If it is left exposed or open, then heat transfer during the night will be fast & pressure drop due to temperature drop will also be high, which migh result in failure of hydro-test record.  

2) In case of seepage, we' ll get pressure drop on gauges,but how to detect the location of leak?

Logic : If the pressure continuously drops, then you may have to cancel the hydro-test, put some color dye in the hydro-test water & pump it again, open up the backfilled portion at strategic locations, repressurise it, if it is truly leaking, then one should see wetted colored soil.   The other case is when temperature drops, pump & increase the pressure to test pressure & hold it, repeat the same for 24 or 48 hrs., if it truly leaks in pipeline, then the defective portion should SWELL in size & one must get higher pressure drop compared to previous one, within the same calculated / observed time.  (this is also called Mechanical Strength Testing which is for 24 hours & can be extended based on field findings, before actual hydroo-test pressure hold starts - practiced by SHELL).    If it does not, then possible there may be some entrapped air,  do the air volume calculations again.    

3) What is the maximum length of pipeline that can be hydro tested at a time?

Logic : There is no set maximum limit specified by the code or standard or specification.  Considering the soil condition - rocky section, black cotton soil or red murram or lose desert sand,  the temperature drop in the pipeline during night time will be different, which the TPI or Consultant will reject the hydro-test on some pretext or so.  Refer to above Point No.2 & the involved logic,  pipeline length of 15-20 kms is good & easier to handle in case of any pressure drop.  Longer sections of say 45-50 kms, will create hassles to you - go back to involved logic in above Point No. 2.  Conclusion :  It is site conditions & situations, topography or terrain, accordingly decide.  Consider maximum piepline section length limit as 25 kms, as the best option.  Further, when running the gauge pig & any imperfections in the received gauge pig, then corresponding investigation will also kill your good work.  So better choose smaller sections & breath maximum oxygen during the pressure holding period,  can go to sleep at right time !!!



On Sunday, October 16, 2011 at 5:34:39 PM UTC+4, prashant pansare wrote:
Dear All,
In Cross country pipeline
1) Why hydro test is carried out after covering / back filling the complete pipeline?
2) In case of seepage, we' ll get pressure drop on gauges,but how to detect the location of leak?
3) What is the maximum length of pipeline that can be hydro tested at a time?
Thanx & Regds,
PSP

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[MW:26000] SAW hardfacing flux

I am struggling with hardness in my SAW hardfacing flux at present i use 68/8 HCFCR and still cant go beyond 52 HRC

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Sunday, January 29, 2017

Re: [MW:25999] RE: 25974] Re: 12688] Cross country pipeline hydro test

Section length also decide based on confirmation of pig manufacturer and pressure difference at high and low point or maximum and minimum

On 28-Jan-2017 2:06 pm, "Lakshman Kumar B" <lakshmankumar4@gmail.com> wrote:

Hi,

 

Please note a small correction in my earlier mail…

As stated by you there is no restriction of length as per B31.8, - your statement and understanding is correct.

In one of my previous project we had a limitation of 50KM and the same I shared at here.

However in general doing 50KM at a single stretch is a big challenge and other parameters may not support too (particularly in INDIA)

If your project specs are permitting you can do the hydro test more than 50KM also, no code restrict' s you…

 

Thanks & Regards,

Lakshman Kumar B,

+91 9440031459.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of belendine@gmail.com
Sent: Monday, January 23, 2017 3:38 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:25974] Re: 12688] Cross country pipeline hydro test

 

Dear Mr Kumar,

 

Would you please elaborate why 50 km is stipulated as the restriction according B31.8? Or did I get it wrong?

Correct me if I'm wrong, ASME B31.8 does not restrict the hydrotest length by number, does it?

 

Regards

On Monday, October 17, 2011 at 5:15:06 AM UTC+1, Lakshman Kumar wrote:

Hi,

Good morning to all,

 

1.      Because of safety parameters HT will be done after back filling – as the pipe passes in public areas also, and keeping the excavated sections to open up to HT is also risk, so there is no other option except to do HT after back filling.

2.      Leakage water will come to ground and we can identify – however in water pipe lines – some extent of leakage is acceptable for small leakages (as per CODE), and heavy leakages will be identified by water on the ground.

For oil& Gas, LPG, other services lines so many other options are their to detect(75% of the cases it will be identified in pigging only)

 

3.      Maximum length depends up on service of the line, geographical conditions, site conditions, elevation differences, water availability and disposal situation however maximum length restriction are their in respect codes ex ASME B 31.8 – for oil & gas 50KM is maximum – and this will be given in client spec also.

 

Thanks and Regards................?

http://lepci.lancogroup.net:50000/irj/go/km/docs/documents/logo1.gif 

Lakshman Kumar.B|Manager |Lanco Infratech Limited

Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004

Phone : + 91 671 2445033 | Mobile : +91 9937286851 |www.lancogroup.com

Go Green|The future will thank you

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of prashant pansare
Sent: Sunday, October 16, 2011 7:05 PM
To: mat wel
Cc: prash pan17
Subject: [MW:12688] Cross country pipeline hydro test

 

Dear All,

In Cross country pipeline

1) Why hydro test is carried out after covering / back filling the complete pipeline?

2) In case of seepage, we' ll get pressure drop on gauges,but how to detect the location of leak?

3) What is the maximum length of pipeline that can be hydro tested at a time?

Thanx & Regds,

PSP

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Saturday, January 28, 2017

Re: [MW:25996] Thin wall, small dia tube weld repair

Thanks, George.
The shop is certified for the job, but they do not know for sure how to access the defect area for its removal and re-welding.
Small size grinder with extendable arm, FCAW process...etc.
 
Best Regards,
Shashank C Vagal 
301, PRATHAMESH, M G Rd – Mahant Rd, Vile Parle East, Mumbai 400 057 INDIA
Tel : +91 22 2611 6640 / (+91) 9821386292 /  8082395502



From: George Dilintas <dilintas@gmail.com>
To: Meghanadh K <materials-welding@googlegroups.com>
Sent: Friday, 27 January 2017 6:15 PM
Subject: Re: [MW:25995] Thin wall, small dia tube weld repair

Check ASME PCC-2-2015

2017-01-26 15:33 GMT+02:00 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com>:
Dear all,
We have repairs in a weld at 180 mm from open end on 47 mm ID x 5 mm thick CS boiler tubes. The repairs are at various depths. Access is available only from ID, approach from OD is not possible. Is there any process by which defects can be removed / repaired. Suitable fixture for internal movement can be made available.
Please advise.
 
Best Regards,
Shashank C Vagal  
301, PRATHAMESH, M G Rd – Mahant Rd, Vile Parle East, Mumbai 400 057 INDIA
Tel : +91 22 2611 6640(+91) 9821386292 /  8082395502
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Dipl. Ing. In Aeronautic and Space Engineering
Ph.D in Mechanics of Solids - Computational Mechanics
A.I.S, A.N.I, IRCA Lead Auditor
Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis
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[MW:25997] RE: 25974] Re: 12688] Cross country pipeline hydro test

Hi,

 

Please note a small correction in my earlier mail…

As stated by you there is no restriction of length as per B31.8, - your statement and understanding is correct.

In one of my previous project we had a limitation of 50KM and the same I shared at here.

However in general doing 50KM at a single stretch is a big challenge and other parameters may not support too (particularly in INDIA)

If your project specs are permitting you can do the hydro test more than 50KM also, no code restrict' s you…

 

Thanks & Regards,

Lakshman Kumar B,

+91 9440031459.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of belendine@gmail.com
Sent: Monday, January 23, 2017 3:38 AM
To: Materials & Welding <materials-welding@googlegroups.com>
Subject: [MW:25974] Re: 12688] Cross country pipeline hydro test

 

Dear Mr Kumar,

 

Would you please elaborate why 50 km is stipulated as the restriction according B31.8? Or did I get it wrong?

Correct me if I'm wrong, ASME B31.8 does not restrict the hydrotest length by number, does it?

 

Regards

On Monday, October 17, 2011 at 5:15:06 AM UTC+1, Lakshman Kumar wrote:

Hi,

Good morning to all,

 

1.      Because of safety parameters HT will be done after back filling – as the pipe passes in public areas also, and keeping the excavated sections to open up to HT is also risk, so there is no other option except to do HT after back filling.

2.      Leakage water will come to ground and we can identify – however in water pipe lines – some extent of leakage is acceptable for small leakages (as per CODE), and heavy leakages will be identified by water on the ground.

For oil& Gas, LPG, other services lines so many other options are their to detect(75% of the cases it will be identified in pigging only)

 

3.      Maximum length depends up on service of the line, geographical conditions, site conditions, elevation differences, water availability and disposal situation however maximum length restriction are their in respect codes ex ASME B 31.8 – for oil & gas 50KM is maximum – and this will be given in client spec also.

 

Thanks and Regards................?

http://lepci.lancogroup.net:50000/irj/go/km/docs/documents/logo1.gif 

Lakshman Kumar.B|Manager |Lanco Infratech Limited

Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004

Phone : + 91 671 2445033 | Mobile : +91 9937286851 |www.lancogroup.com

Go Green|The future will thank you

 

 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of prashant pansare
Sent: Sunday, October 16, 2011 7:05 PM
To: mat wel
Cc: prash pan17
Subject: [MW:12688] Cross country pipeline hydro test

 

Dear All,

In Cross country pipeline

1) Why hydro test is carried out after covering / back filling the complete pipeline?

2) In case of seepage, we' ll get pressure drop on gauges,but how to detect the location of leak?

3) What is the maximum length of pipeline that can be hydro tested at a time?

Thanx & Regds,

PSP

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Re: [MW:34832] Inquiry about Single Bevel with Back Grinding

Dear Uday, As per your question that one is called with backing only,Simple both side you are welding it is backing with strip or without st...