Materials & Welding

for pre and post heating of clad no other special equipment required.  What is base metal and what material is clad layer. if clad layer is of Inconel, no much worries. If clad layer is of SS again which grade ? if 321 or 347 than again no worries. if its L grade of SS, due to low range of carbon, carbaide formation is avoided at large extent. If it is normal SS grade, i.e. 304 or 316, then carbaide formation may take place.  Another way is to provide inert atmosphere (argon during heating, due to cost constraint Nitrogen can be used),   The best way  is to qualify PQR with corrosion test with simulated pre / post Heating.   I am not sure Mr. Shashank want to know about just heating methods. In case of  PWHT of any clad its advisable to apply chalk paste to avoid discolorisation of clad material.  On 30 October 2012 09:45, Hemant Solanki < shm8324@gmail.com > wrote: I have gone through PWHT procedure followed by Vendor in one of our Project for cladded equipment. even th...

Kindly refer Table 9 (Tolerances for wall thickness) in API 5L (2004).     Regards Devang Majithia   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Nandesh Kumar Sent: Wednesday, October 31, 2012 12:03 PM To: materials-welding@googlegroups.com Subject: Re: [MW:15820] PIPE- THICKNESS VARIATIONS   Biplab, The thread/post is about API 5L. See the table J.4; foot note b Respectfully, Nandesh Kumar A --- On Tue, 30/10/12, Biplab Pal <biplab.mech@googlemail.com> wrote: From: Biplab Pal <biplab.mech@googlemail.com> Subject: Re: [MW:15814] PIPE- THICKNESS VARIATIONS To: materials-welding@googlegroups.com Date: Tuesday, 30 October, 2012, 12:51 PM Dear Mr. Devang,   Can you please specify, where in piping code indicate that the thick...

Dear Dasari, 1. Yes there will be variation in pressure gauge reading when they are fitted at different heights because of the general static head difference, Generally for 10 meter static head difference the pressure difference will be 1 bar (14.5 psi). 2. Normally the first step can be 50% the test pressure and then pressure can be increased to the final test pressure by another 5 steps each compensating 10% totaling 100% by 6 steps.  3. I think socket weld is a circumferential weld as it makes a complete circumference. On Wed, Oct 31, 2012 at 10:03 AM, srikanth dasari < dasarosyis@gmail.com > wrote: Dear experts, 1.while performing a Hydro static test in a pipe line/spool at two different elevation for a continuous one line ,one pressure gauge  has found one reading  at one elevation and another pressure gauge has found another reading at another elevation how much can be the pressure variation in the Two pressure gauges as temperature is also a factor how much temp var...

Dear Experts, Please refer trail official interpretation of ASME Section IX. Interpretation: IX-04-15 Subject:  QW-407.2, Base Metal Thickness Qualification and QW-407.2, PWHT Temperature and Time Range Date Issued:    December 22, 2004 File No:    04-1595 Question (1):  Will a procedure qualification test coupon on 1.5 in. thick P-No. 1, Gr. 2 material and post weld heat treated at 1100 deg. F. for 1.5 hours with supplementary essential variable requirements met, support a WPS with supplementary essential variable requirements for production welding on 8 in. thick P-No. 1, Gr. 2 material that is PWHT at 1100 deg. F. for 3.5 hours? Reply (1):  No. Question (2):  Based on the conditions stated in Question 1, could the PWHT time on the 8 in. thick weldment be increased to 4 hours and 10 minutes at 1100 deg. F. and still be in compliance with Code requirements?  Reply (2):  No. As per my opinion Answer as 'NO' is correct because requirement of at least 80% soak...

Dear Friends,   How do you think about induction heater for PWHT.   We supply induction heater for PWHT. Pls check the pic.     1. Around the insulation blanket on the pipe. 2. Around the induction coil on the insulation blanket. (10 ~ 15 turns will be ok) 3. Connect the induction coil on the induction heater. 4. Connect the K type thermocouple on the induction heater. Setting the heating process. The machine will ok. 5. Start the induction heater then It will work well.   It has many advantage compare with resistence heater: Quickly heating speed. It can reach 650 degree C within 30 minutes. It will save many times compare with resistence heater. Electrical Power Saving: It can save more than 50% electrical power compare with resistence heater. Stable for long time using: The equipment and induction coil are more stable compare with resistence heater Easy to operate and move and so on. The control system is to...

Biplab, The thread/post is about API 5L. See the table J.4; foot note b Respectfully, Nandesh Kumar A --- On Tue, 30/10/12, Biplab Pal <biplab.mech@googlemail.com> wrote: From: Biplab Pal <biplab.mech@googlemail.com> Subject: Re: [MW:15814] PIPE- THICKNESS VARIATIONS To: materials-welding@googlegroups.com Date: Tuesday, 30 October, 2012, 12:51 PM Dear Mr. Devang,   Can you please specify, where in piping code indicate that the thickness variation should be between + or - 12.5%   On Tue, Oct 30, 2012 at 11:48 AM, Devang Majithia < dmmajithia@gnfc.in > wrote: Code is allowing variation of (+)12.5% or (-) 12.5% of specified thickness. Similar kind of issue had occurred with our company. Piping was manufactured as per API 5L Gr. B. After referring API 5L specification we came to know that code is allowing variation of 12.5% on lower and upper side. For other ASME manufactured pipe variation is identical. Hope info will be helpful to u ...

Ravi, Following is the extraction of ASTM E94: Clause 15.2 The radiographic image of an object or feature within an object may be larger or smaller than the object or feature itself, because the penumbra of the shadow is rarely visible in a radiograph. IMO, you can not measure Ug on a radiograph using a scale. as the Ug will always be very negligible in dimension, usually less than 0.5 mm (if proper techniques are followed) You can measure the Ug (the penumbra), only if you are making a 'deliberate' setup like large Object to film distance, large source size than the discontinuity size whose Ug is to be measured etc. And finally, if the Ug is measurable on the film, really it is a bad quality radiograph...!!! Respectfully, Nandesh Kumar A --- On Tue, 30/10/12, Vajjiravelu Ravi <vajjiraveluravi3@gmail.com> wrote: From: Vajjiravelu Ravi <vajjiraveluravi3@gmail.com> Subject: Re: [MW:15815] Can we measure the Ug To: materials-welding@googlegroups.com Date: Tuesday, 30...

Dear experts, 1.while performing a Hydro static test in a pipe line/spool at two different elevation for a continuous one line ,one pressure gauge  has found one reading  at one elevation and another pressure gauge has found another reading at another elevation how much can be the pressure variation in the Two pressure gauges as temperature is also a factor how much temp variation can be allowed as per code??? 2.How much percentage of  increase in testing pressure can be increased in testing a pipe line for HST for a specific Testing pressure given in the Drawings???   3.Please clarify whether Socket weld is Circumferential welding or not define types of circumferential joints??? DASARI SRIKANTH -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding....

Hi, I would use E309 for this thickness, no preheating, maximum interpass temperature is 150 deg C Regards, Manpreet Singh On Tue, 30 Oct 2012 14:17:45 +0530 wrote >Dear Experts, In our isometric drawing shows dissimilar welding carbon steel to duplex stainless steel ( 31254 grade ) thk is 9.52 mm. Can anybody give me guideline to make this WPS. Regards Pradip -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@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. ...

Hi Pradip, UNS 31254 is a super austenitic stainless steel, popularly known as 254SMO. See the attached document (highlighted texts) for instructions on welding , between similar base metals and dissimilar welds between C.S # UNS S31254. For welds involving PWHT advisable would be to butter the C.S, perform PWHT followed by welding to UNS S 31254. Thanks P.Goswami,P.Eng.IWE Welding & Metallurgical Specialist Ontario, Canada. Email-pgoswami@sympatico.ca , pgoswami@quickclic.net -----Original Message----- From: pradip kumar sil [mailto: pradipsil@gmail.com ] Sent: Monday, October 29, 2012 3:40 AM To: materials-welding Cc: pgoswami Subject: Dissimilar welding CS to DUPLEX SS Dear Experts, In our isometric drawing shows dissimilar welding carbon steel to duplex stainless steel ( 31254 grade ) thk is 9.52 mm. Can anybody give me guideline to make this WPS. Regards Pradip -- To post to this group, send email to materials-welding@googlegroup...

Dear Pradip, Is the service is for upstream (offshore oil and gas) or downstream (oil and gas refining) environments. If the s e rvice is for upstream environments then MR-0175-ISO-15156-2 requirements as stated below will be applicable. Refer Annex-A of MR-0175 for this. Welding consumables and procedures that produce a deposit containing more than 1 % mass fraction nickel are acceptable after successful weld SSC qualification by testing in accordance with Annex B. ER-70S-2 and E-7018 will not have problem with respect to this issue. However advise would be  to get the " Confirmation from the consumable manufacturer", as welding consumables meet requirements of MR-0175/ISO-15156. Thanks. Pradip Goswami,P.Eng.IWE Welding & Metallurgical Specialist Ontario, Canada. Email-pgoswami@sympatico.ca, pgoswami@quickclic.net Maximum acceptable hardness values for carbon steel, carbon-manganese steel and low-alloy steel welds ----- Origi...

Dear Patel, Provide ur Duplex material UNS No. to get details; for further clarification refer Sec-no.-IX;   QW/QB-422 With thanks, Ratnakar.G On Tue, Oct 30, 2012 at 1:59 PM, Ankit PAtel < ankit.patel@orientalindia.net > wrote: Dear Experts Kindly give me a guideline for Duplex stainless steel PQR test requirement & Consumable requirement as per EIL specification. Also send EIL specification No./specification.   Regards Jatin Patel       -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@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. appl...

Mr.Roy Thanks a lot for your help.i also need the same for overlap and arcstrike. Thanks ----- Forwarded Message ----- From: raj susi <rjsusi@yahoo.com.sg> To: materials-welding@googlegroups.com Sent: Monday, 29 October 2012, 18:06 Subject: Re: [MW:15793] Weld Defect Photos with Chinese Sub-Titles Mr.Roy Thanks a lot for your help.i also need the same for overlap and arcstrike.Thanks------------------------------ On Mon, Oct 29, 2012 4:46 AM CST (China) Roy Liu wrote:  >Hi, >FYI > > >ROY >BOHLER WELDING CHINA > > > >-----原始邮件----- From: raj susi >Sent: Sunday, October 28, 2012 10:34 AM >To: materials-welding@googlegroups.com >Subject: [MW:15787] Weld Defect Photos with Chinese Sub-Titles > > >Dear friends >In my company (in Singapore)we have a lot of chinese welders and its difficult for me to explain the welddefects in chinese because they don understand english well.i have these photos wit english titles,so...

Dear Valeria   yes i have it in english. From: Valeria Vargas <vvargas@infa.com.ar> To: materials-welding@googlegroups.com Sent: Monday, 29 October 2012, 19:52 Subject: Re: [MW:15799] Weld Defect Photos with Chinese Sub-Titles Do you have it in english? Thank you. Valeria De:         Roy Liu <standardliu@hotmail.com> Para:         <materials-welding@googlegroups.com> Fecha:         28/10/2012 22:25 Asunto:         Re: [MW:15793] Weld Defect Photos with Chinese Sub-Titles Enviado por:         materials-welding@googlegroups.com Hi, FYI ROY BOHLER WELDING CHINA -----原始邮件----- From: raj susi Sent: Sunday, October 28, 2012 10:34 AM To: materials-welding@googlegroups.com Subject: [MW:15787] Weld Defect Photos with Chinese Sub-Titles Dear friends In my company (in Singapore)we have a lot of chinese welders and its difficult for me to explain ...

GENTS, Which is the best PWHT unit available for pre and post heating? For jobs with cladding is there any special equipment with extra controls? Best regards, Shashank V --- On Tue, 30/10/12, Hemant Solanki <shm8324@gmail.com> wrote: From: Hemant Solanki <shm8324@gmail.com> Subject: [MW:15806] PWHT of Cladded Equipment To: materials-welding@googlegroups.com Date: Tuesday, 30 October, 2012, 11:15 AM I have gone through PWHT procedure followed by Vendor in one of our Project for cladded equipment. even though SS cladding is there vendor has kept holding temperature upto 620°C (as per CS base material requirement). whether sensitization phenomenon should look into this or not. Because at this much temperature SS cladding may get sensitize and its property may get inferior.   As per UCL-34 cautionary note Postweld heat treatment may be in the carbide-precipitation range for unstabilized austenitic chromium–nickel steels, as well as within the range where a sigma pha...

Dear Mr. Devang,   Can you please specify, where in piping code indicate that the thickness variation should be between + or - 12.5%   On Tue, Oct 30, 2012 at 11:48 AM, Devang Majithia < dmmajithia@gnfc.in > wrote: Code is allowing variation of (+)12.5% or (-) 12.5% of specified thickness. Similar kind of issue had occurred with our company. Piping was manufactured as per API 5L Gr. B. After referring API 5L specification we came to know that code is allowing variation of 12.5% on lower and upper side. For other ASME manufactured pipe variation is identical. Hope info will be helpful to u   Regards Devang Majithia   From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of GOPU NAIR Sent: Sunday, October 21, 2012 4:26 AM To: materials-welding@googlegroups.com Subject: Re: [MW:15729] PIPE- THICKNESS VARIATIONS   Dear Mr. Kumar It is possible for either cold drawn or hot drawn pipe t...

the question is how it is possible to measure the Ug, anyhow thks for your kind response On Tue, Oct 30, 2012 at 1:33 PM, cbe swamy < cbe_swamym@hotmail.com > wrote: Dear all,   T-274.1 Geometric Unsharpness Determination. Geometric unsharpness of the radiograph shall be determined in accordance with:   U g = Fd/D   where,   U g = geometric unsharpness   F = source size: the maximum projected dimension of the radiating source (or effective focal spot) in the plane perpendicular to the distance D from the weld or object being       radiographed D = distance from source of radiation to weld or object being radiographed d p distance from source side of weld or object being radiographed to the film D and d shall be determined       at the approximate center of the area of interest. Please refer Sec -V ASME for more details.   Thank & Best Regards,   M Veera SAMY- Bureau Veritas. Coimbatore       Date: Tue, 30...