Materials & Welding

Hi! LPTwill indication of superficial flaws while as Helium or even air test will ensure even subsurface flaws reached up to root which is camaflaaged This may affect the min req leak path dimension  Therefore some time this type of air test or helium leak test is recomended for root pass Regards Hegde Sent from Yahoo Mail on Android On Sat, 28 Apr 2018 at 17:57, Makrand Sakpal <makrands9@gmail.com> wrote: Dears,  For tube-to-tubesheet joints in air cooled heat exchangers, can helium leak test be a substitute for PT test? One of our vendor have proposed helium leak test in lieu of PT test for tube-to-tubesheet joints. Vendor have provided following justification, We have offered a helium leak test after welding the tubes, in lieu of the requested liquid dye penetrant testing of the T/TS welds. We have found that the application process of spraying the liquid penetrant and developer through a plug hole using an aerosol can is ineffective as it is dif...

He leak test will detect through and through discontinuities. PT will detect open to surface discontinuities. Hence Surface discontinuities will not be revealed by He leak test. P. V. Ghanekar  On Sun, 29 Apr 2018 08:55 chiluka venkatramulu, < ramuluchiluka@gmail.com > wrote: Helium leak test is more effective than PT test. It will detect minute leaks. Its sensitivity also high. In my opinion it can be accepted.Before that you need to accept their procedure and leak rate. Venkatramulu On Sat, Apr 28, 2018 at 4:32 PM, Makrand Sakpal < makrands9@gmail.com > wrote: Dears,  For tube-to-tubesheet joints in air cooled heat exchangers, can helium leak test be a substitute for PT test? One of our vendor have proposed helium leak test in lieu of PT test for tube-to-tubesheet joints. Vendor have provided following justification, We have offered a helium leak test after welding the tubes, in lieu of the requested liquid dye penetrant testing of the T/TS welds. We have fou...

Helium leak test is more effective than PT test. It will detect minute leaks. Its sensitivity also high. In my opinion it can be accepted.Before that you need to accept their procedure and leak rate. Venkatramulu On Sat, Apr 28, 2018 at 4:32 PM, Makrand Sakpal < makrands9@gmail.com > wrote: Dears,  For tube-to-tubesheet joints in air cooled heat exchangers, can helium leak test be a substitute for PT test? One of our vendor have proposed helium leak test in lieu of PT test for tube-to-tubesheet joints. Vendor have provided following justification, We have offered a helium leak test after welding the tubes, in lieu of the requested liquid dye penetrant testing of the T/TS welds. We have found that the application process of spraying the liquid penetrant and developer through a plug hole using an aerosol can is ineffective as it is difficult to control the amount of chemicals being applied. we have even experienced on some jobs where excessive penetrant of developer...

Dears,  For tube-to-tubesheet joints in air cooled heat exchangers, can helium leak test be a substitute for PT test? One of our vendor have proposed helium leak test in lieu of PT test for tube-to-tubesheet joints. Vendor have provided following justification, We have offered a helium leak test after welding the tubes, in lieu of the requested liquid dye penetrant testing of the T/TS welds. We have found that the application process of spraying the liquid penetrant and developer through a plug hole using an aerosol can is ineffective as it is difficult to control the amount of chemicals being applied. we have even experienced on some jobs where excessive penetrant of developer solidifies giving false negative/positive results causing unnecessary rework or obscuring potential indications (leaks). if PT testing is desired over the helium leak testing, we can perform the testing at no charge, but will not guarantee or provide a report stating the results were acceptabl...

In section viii div 1 Rgds Prakash Gotimukul AIS On Sat, 28 Apr 2018, 09:17 Mohan, < ggnanamalli@gmail.com > wrote: Dear Experts, Where in the code book does it state that the Hydrostatic Gauge should be between 1.5-4 times for  hydrostatic test pressure? Regards G.Mohanraj -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout . -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Materials & Welding" group. ...

Dear Mr Mohan,  Refer Sec VIII DIV 1 UG-102 Test Gage. Best Regards, Jay Poojary On Sat, Apr 28, 2018, 9:17 AM Mohan < ggnanamalli@gmail.com > wrote: Dear Experts, Where in the code book does it state that the Hydrostatic Gauge should be between 1.5-4 times for  hydrostatic test pressure? Regards G.Mohanraj -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout . -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- You received this message because you are subscribed to the Google Groups "Mat...

Dear Experts, Where in the code book does it state that the Hydrostatic Gauge should be between 1.5-4 times for  hydrostatic test pressure? Regards G.Mohanraj -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

Dear Experts,  Is there any code specify the numbers of sample piece to be sent for test in laboratory for structural steel in terms of heat number or MT. Sent from Yahoo Mail on Android -- https://materials-welding.blogspot.com/ https://www.linkedin.com/groups/122787 --- 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 . Visit this group at https://groups.google.com/group/materials-welding . For more options, visit https://groups.google.com/d/optout .

I hereby would like to understand what would be the issue if the tank is painted completely ?  Is the water load and pressure will be retained by 500 micron paint ,  practically ? Think it guys  and correct me if am wrong  Thanks On Mon, Apr 23, 2018 at 2:01 PM, Bapat, Ramesh < Ramesh.Bapat@cbi.com > wrote: Hello Manoj, Sunil Kumar and All As far as I know, When the next edition of API 650 is published which is expected to be within the next couple of months, the wording below is to be included to provide guidance to owners who wish to consider internal & external coatings before the tank is hydrotested.  This will be a decision that only the owner can make. 7.3.7.2 Unless otherwise specified by the purchaser, all internal and external coating systems that will cover tank shell joints shall be applied after the hydrostatic test. If specified by the purchaser that a coating system is to be applied to the shell joints before the hydrostatic test, all shell join...

Hello Manoj, Sunil Kumar and All As far as I know, When the next edition of API 650 is published which is expected to be within the next couple of months, the wording below is to be included to provide guidance to owners who wish to consider internal & external coatings before the tank is hydrotested. This will be a decision that only the owner can make. 7.3.7.2 Unless otherwise specified by the purchaser, all internal and external coating systems that will cover tank shell joints shall be applied after the hydrostatic test. If specified by the purchaser that a coating system is to be applied to the shell joints before the hydrostatic test, all shell joints to be coated shall be tested in accordance with 7.3.6.2.a prior to the application of coating. Hope this helps somewhat. Thanks and Best Regards, Ramesh Ramesh Bapat CMfgE, PE Senior Engineering Advisor (Metallurgy) Engineering & Construction ramesh.bapat@CBI.com CB&I 5850 Rogerdale Road S...

Hi, To add to below mail, alternatively you can select ER80SNi-1 which is classified for -46 Deg. C provided Ni content shall be <1% for sour service application. L. Prabhu kumar From: "Prabhu kumar Loganathan"<prabhu_rec@rediffmail.com> Sent: Mon, 23 Apr 2018 16:19:06 To: "materials-welding@googlegroups.com"<materials-welding@googlegroups.com> Subject: Re: [MW:27723] impact testing of welding consumable , ASME VIII Div 1 Hi Ramesh, Your interpretation is correct as specified in below mail. Impact test exempted for PQR qualification i.e. weld and HAZ, provided welding filler metal as specified in SFA specification shall confirm CVN test at MDMT or Colder temperature. In this case filler metal is specified with -30 Deg. C CVN test and MDMT is -46 Deg. C and hence welding filler metal shall be tested at -46 Deg. C. This requirement shall be included in the PO stage itself so that filler metal manufacturer shall take care of impact test at -46 Deg. C (wi...

Dear all, Please provide the study material like questions answered for NACE level 1 exam.please share if available. My mail id  krajaqc@gmail.com Sent from Yahoo Mail for iPhone

Hi Manoj, Normally in API 650 tanks water test is done to analyse the settlement & to check leak too. if the tank internal & external is painted, it may mask any possible pin-holes or cracks etc.. So i personally feel that it is better to do before painting. however expecting experts opinion on this as well. Regards, Sunil kumar On 4/23/18, pkkanishk2006@gmail.com < pkkanishk2006@gmail.com > wrote: > Hi Manoj , > > Yes its possible and ok to do a water fillup test after painting , but pls > ensure that the painting has been given required curing time to avoid any > cohesive disbandment . > > Regards, > Pratish > > On Monday, April 23, 2018 at 3:52:28 AM UTC+1, John Manoj wrote: >> >> Dear expert. >> >> We have one proposal to do water fillup test after internal and external >> painting of water tank which is fabricated as per API 650. >> Internal paint : 300 micron ...

Hi Ramesh, Your interpretation is correct as specified in below mail. Impact test exempted for PQR qualification i.e. weld and HAZ, provided welding filler metal as specified in SFA specification shall confirm CVN test at MDMT or Colder temperature. In this case filler metal is specified with -30 Deg. C CVN test and MDMT is -46 Deg. C and hence welding filler metal shall be tested at -46 Deg. C. This requirement shall be included in the PO stage itself so that filler metal manufacturer shall take care of impact test at -46 Deg. C (with minor medication of elements to improve toughness). Do not procure and test at -46 Deg. C with may pass for some batch and however it shall be ensured by the filler metal manufacturer. Hope it is clear. L. Prabhu kumar Ph. no.+91 9003010978/ +968 95202761. From: Ramesh <rameshkannandevaraj@gmail.com> Sent: Wed, 18 Apr 2018 12:38:00 To: materials-welding@googlegroups.com Subject: Re: [MW:27723] impact testing of welding consumable , ASME VIII Div 1 ...