Re: [MW:17089] % RT Requirement for piping

[Raghuram Bathula]

pl. refer below

On Thu, Mar 14, 2013 at 4:28 PM, savad <sava...@gmail.com> wrote:

Gents,

 

In my project ( PlantPiping) the RT requirement is 20% for some ISO drawing. For evey welder the first 10 joints to be 100% RT/Process.

Could you please advise me what is the common practice from your exp.

1. this first 10  joints will add to the to total 10% or not.

You can consider First 10 joinst also in the specified % 

2. The 10% will be fully from the main line or will take from branch also.

can be taken from any radiographable joint  

3 If taking any joint from Brach will it account to the 10% or not

yes it will 

 Your reply will be highly appreciated.

 

BR

Savad

 

[G Sreenivas Rao]

Dear sir
Generaly in piping, 1st 2joints shall be radiographed per welder and
then percentage shall be covered ( if you refer any EIL
specifications) as per client specifications, we did same thing in
HPCL- vizag and cochin , BPCIL karur.
Regards
GSR
9441511368
Hyderabad

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[Chauhan Hemal]

As per EIL specification,

After satisfactory WQT of welder,before we mobilize the welder on the job radiography of first 2.nos production joint should be taken for pipe dia above 6" and one production joint should be taken for pipe dia below 6",and that radiographed production joints must not be covered in the radiography percentage required for that particular pipe class.if any repair found in production joint radiography 2.nos penalty joints should be taken seperately on the job by that particular production joint.

Regards,

hemal chauhan,

Engineers india limited

9909918636

---

From: G Sreenivas Rao <gsrin...@gmail.com>
To: material...@googlegroups.com
Sent: Thursday, 14 March 2013 4:28 PM
Subject: Re: [MW:17102] % RT Requirement for piping

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[Raghuram Bathula]

Dear Mr. Chauhan

With due respect, i disagree with your statement. no where EIL std does state this requirement (i.e first two joints would not be part of % covered in a system)

i just give you an example. in a typical project in India, where skilled welders are abundant and attrition ratio is very high, we are ending up qualifying over 400 welders vs 100 of actual requirement. imagine aprx 800 joints radio-graphed as production welds, yet these are not covered in %?

and as far Mr Savad's query is concerned if he start adding 10 welds per welder, he may end up doing 20% RT, where 10% is required actually, remember the schedules are squeezing day by day for new projects, gone are the days where RT work used to be a night activity. It's  nightmare for the the project manger, including client's.

BR

[Chauhan Hemal]

Dear Mr Raghuramji,

           In the process of Welder qualification production joint radiography is very important step,welder must pass this test after we can mobilize the welder on the job and that production joint radiography accepted as per radiography acceptance criteria given in the Qw-191 which acceptance criteria is very different from  fluid service radiography acceptance criteria used for different fluids and very stringent also than fluid service acceptance criteria.we cant cover radiography percentage by radiography of joints accepted by different radiography acceptance criteria.

         Even any code not states for to cover production joint radiography in radiography percentage so last decision depend upon client is the final desicion,and in case of repair found in joints there is no limit of radiography percentage.

Regards,

hemal chauhan

Engineers india limited.

         

     

---

From: Raghuram Bathula <raghura...@gmail.com>
To: material...@googlegroups.com
Cc: Chauhan Hemal <hemal...@yahoo.co.in>; hemal...@yahoo.co.in
Sent: Friday, 15 March 2013 10:24 PM
Subject: Re: [MW:17114] % RT Requirement for piping

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[HAREESH K V]

There is a corection in what described in march 15th mail regarding M/s.EIL specification.

In case of 6" and below size joints, first two joints are to be radiographed and above that, one joint to be radiographed. (Reference: EIL Specification: 6-77-000; Rev3, Page:13, Clause:h) and M/s.EIL specification does not mention that production joint should not be covered in percentage radiography. As per my experience with M/s.EIL in two sites, this has not came as a dispute topic and we considered the production joint in % radiography coverage.

Also we managed welders, to do production joints in lines in which radiography coverage is to be done (This is one way to tackle the problem of Mr.Savad). 

--

----------------------
Hareesh K V
+91-9447625012

[Ahmed Husain]

Gents,

 

Normally initial production joints NDT are client requirement, such as Aramco, where first three production weld of new welders are radiographed. In Aramco, these initial production joints are not considered in NDT percentage coverage for line class requirements.

 

A.Husain

From: Chauhan Hemal <hemal...@yahoo.co.in>
To: "material...@googlegroups.com" <material...@googlegroups.com>
Sent: Thursday, March 21, 2013 3:11 PM
Subject: Re: [MW:17179] % RT Requirement for piping

Dear Mr Raghuramji,

           In the process of Welder qualification production joint radiography is very important step,welder must pass this test after we can mobilize the welder on the job and that production joint radiography accepted as per radiography acceptance criteria given in the Qw-191 which acceptance criteria is very different from  fluid service radiography acceptance criteria used for different fluids and very stringent also than fluid service acceptance criteria.we cant cover radiography percentage by radiography of joints accepted by different radiography acceptance criteria.

         Even any code not states for to cover production joint radiography in radiography percentage so last decision depend upon client is the final desicion,and in case of repair found in joints there is no limit of radiography percentage.

Regards,

hemal chauhan

Engineers india limited.

         

     

From: Raghuram Bathula <raghura...@gmail.com>
To: material...@googlegroups.com
Cc: Chauhan Hemal <hemal...@yahoo.co.in>; hemal...@yahoo.co.in
Sent: Friday, 15 March 2013 10:24 PM
Subject: Re: [MW:17114] % RT Requirement for piping

Dear Mr. Chauhan

With due respect, i disagree with your statement. no where EIL std does state this requirement (i.e first two joints would not be part of % covered in a system)

i just give you an example. in a typical project in India, where skilled welders are abundant and attrition ratio is very high, we are ending up qualifying over 400 welders vs 100 of actual requirement. imagine aprx 800 joints radio-graphed as production welds, yet these are not covered in %?

and as far Mr Savad's query is concerned if he start adding 10 welds per welder, he may end up doing 20% RT, where 10% is required actually, remember the schedules are squeezing day by day for new projects, gone are the days where RT work used to be a night activity. It's  nightmare for the the project manger, including client's.

BR

On Friday, March 15, 2013 4:41:52 PM UTC+5:30, Chauhan Hemal wrote:

As per EIL specification,

After satisfactory WQT of welder,before we mobilize the welder on the job radiography of first 2.nos production joint should be taken for pipe dia above 6" and one production joint should be taken for pipe dia below 6",and that radiographed production joints must not be covered in the radiography percentage required for that particular pipe class.if any repair found in production joint radiography 2.nos penalty joints should be taken seperately on the job by that particular production joint.

Regards,

hemal chauhan,

Engineers india limited

9909918636

[Raghuram Bathula]

In my opinion it has to be stated clearly in the contract specification whether to consider or not, in absence of this we can consider the production joints in % RT irrespective their acceptance criteria. 

Again the acceptance criteria per QW  191? i strongly disagree here. why one should use it for production welds. does the contract specification indicates anywhere?