Materials & Welding

Dear Friends, Question asked by your friend is" i have 3 pipeline burried ...i need to know what minimum spacing is recommanded....(api 1104/ b31.4)" So instead of mixing up all information answers should be specific to the questions and convincing openions. API 1104 deals only with welding requirements ,but the spacing is governed by B31.4/31.8 and national regulations for India {OISD} and some times the CP Design also to be taken into considerations.  This is my view  considering question pertains buried cross country pipeline and not plant piping and user need to verify with respect the national regualtions requirements and design basis considered during engineering. Regards ----- Original Message ----- From: Sujeet Sangle To: materials-welding@googlegroups.com Sent: Mon, 31 Aug 2009 16:36:30 +0530 (IST) Subject: [MW:3091] Re: piping and pipleine spacing Dear Lobo,   this is not given is code , this is was the client will be pro...

Dear Agustin,   thanks a lot for your slon.   do you have any procedure for this.... Please send me the information.if u have...   Your reply appreciated in advance..   Regards,   Prakash K B   On 8/31/09, AGUSTIN JIMENEZ < agumarca@yahoo.com > wrote: Too try use insulating gasket for bolts and nuts. excuse me if my english is not good.   Regards Agustin Jimenez    De: Nilesh Pathare < patharenil@gmail.com > Para: materials-welding@googlegroups.com Enviado: lunes, 31 de agosto, 2009 5:15:46 Asunto: [MW:3088] Re: Coating material for LTCS bolts on SS 304 flanges You can go for FBE ( Fusion Bonded Epoxy) coating for those bolts. FBE coating is a good option. But check other parameters and the fluid if its affect the FBE material. Regards, Nilesh Pathare. On Fri, Aug 28, 2009 at 2:48 PM, prakash kamathuru < prakashkbp@gmail.com > wrote: Dear all,   Can any one help me to find the coating material for A320 Gr L7 bolts and A 194 Gr 2...

Gentlemen, it shall be informed by the client i.e for ARAMCO they are requiring 1 M distance or gap in case of intersecting pipes measured from top of the lower pipe to the bottom of upper pipe , while for parallel buired pipes it shall be 3 meter. sohaib --- On Mon, 8/31/09, Sujeet Sangle < sujeetsangle@gmail.com > wrote: > From: Sujeet Sangle < sujeetsangle@gmail.com > > Subject: [MW:3091] Re: piping and pipleine spacing > To: materials-welding@googlegroups.com > Date: Monday, August 31, 2009, 2:06 PM > Dear Lobo, >   > this is not given is code , this is was the client > will be providing the information , >   > If all is covered in code when why separate client > specification are required ? >   > If not provided by the client , the contractor or the > consulting party need to step up and inform the client . > >   > pleas let all of know your views . >   > Thanks >   > Sujeet ...

Dear Lobo,   this is not given is code , this is was the client will be providing the information ,   If all is covered in code when why separate client specification are required ?   If not provided by the client , the contractor or the consulting party need to step up and inform the client .   pleas let all of know your views .   Thanks   Sujeet On Sat, Aug 29, 2009 at 10:01 PM, < francis.lobo@indiatimes.com > wrote: Dear Friends, Pl give me the reference of respective code with the clause nos for the below mentioned reply. Best  Regards, ----- Original Message ----- From: Sujeet Sangle To: materials-welding@googlegroups.com Sent: Fri, 28 Aug 2009 17:25:37 +0530 (IST) Subject: [MW:3061] Re: piping and pipleine spacing Dear Daniel ,   If you are looking for spacing between the pipe and the ground , it is stated in the API 1104 for p/l ,   If you are looking for spacing between 2 welds  usually it is 3  times diameter , or as per client specification...

Too try use insulating gasket for bolts and nuts. excuse me if my english is not good.   Regards Agustin Jimenez  De: Nilesh Pathare <patharenil@gmail.com> Para: materials-welding@googlegroups.com Enviado: lunes, 31 de agosto, 2009 5:15:46 Asunto: [MW:3088] Re: Coating material for LTCS bolts on SS 304 flanges You can go for FBE ( Fusion Bonded Epoxy) coating for those bolts. FBE coating is a good option. But check other parameters and the fluid if its affect the FBE material. Regards, Nilesh Pathare. On Fri, Aug 28, 2009 at 2:48 PM, prakash kamathuru < prakashkbp@gmail.com > wrote: Dear all,   Can any one help me to find the coating material for A320 Gr L7 bolts and A 194 Gr 2 nuts on SS 304 Flanges.As i checked the galvonic series Zn/mg not recomnded.Presently this heat exchnger flange which is already installed at site.Any Solution,so that without disturbing the joint we can coat some material at site for controlling galvonic corrosion. ...

You can go for FBE ( Fusion Bonded Epoxy) coating for those bolts. FBE coating is a good option. But check other parameters and the fluid if its affect the FBE material. Regards, Nilesh Pathare. On Fri, Aug 28, 2009 at 2:48 PM, prakash kamathuru < prakashkbp@gmail.com > wrote: Dear all,   Can any one help me to find the coating material for A320 Gr L7 bolts and A 194 Gr 2 nuts on SS 304 Flanges.As i checked the galvonic series Zn/mg not recomnded.Presently this heat exchnger flange which is already installed at site.Any Solution,so that without disturbing the joint we can coat some material at site for controlling galvonic corrosion.   Please keep in mind that it is STHE body flange.   Your feedbacks very helpful for me in taking decision and appriciated.   Regards,   Prakash -- Best Regards, Nilesh Pathare --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this g...

Dear Mr. Vagal, 1. For radiography of 60 mm thickness of S.S. C0 60 is preferred with Slow films comparing to IR 192 code permits. 2. High strength IR 192 for short exposure time even the penetrating strength ate same for low strength( exposure time more). 3. Transverse (shear wave) probes of 2 MHz for stainless steel will give more Hash (grass echo) due to coarse grain structure. You will not able to see indications on screen due to the grass echoes. So we could not do the Ultrasonic Testing of 60 mm thick weld joint with shear wave probe for sure. If you see ASME section 5 article 4 for C.S. weld we can use a plate as Side drilled hole(SDH) cal. block but in stainless steel welds you should make a block with weld and the SDH shall be drilled in weld. For 60 mm thick the dB difference will be more than 6 dB to pick up a hole from S.S plate and S.S. weld. Twin crystal probes manufactured by RTD are longitudinal wave probes which can penetrates effectively in S.S. weld material. When ...

You require to carry Disbonding test at that temp i.e. at 530C due to design temp recomended Generally it is being carried at 454,468,482 as scheveron spec ask Hot tensile at these temp. for P22 therefore on this basis customer ask for disbanding at these temp. Regards Hegde -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Amarjit Singh Sent: Friday, August 28, 2009 11:06 PM To: Materials & Welding Subject: [MW:3065] hydrogen disbonding for SS clad at 530 deg C Dear all, I have a vessel SS 347 clad on P4 material. The vessel is to be used in H2s service at a temperature of 530 deg C. Specification is asking for autoclave/ H2 disbonding test for weld overlay. what are the basis to decide for the test? Is it neccessary to do at 530 deg C or there is any other permutation or combination to do the test at lesser temp? If yes please guide regards, Amarjit singh --~--~---------~--~----~------------~-------~-...

Dear friends , As per my suggestion, you better to select Co.60 only because the Ir -192 source is can do max .50 mm is sufficient but the code says can do upto 69mm .practically you can select the source Co -60 and you can save time as well as will achieve the sensitivity ,what the code and spec. recommended. R.Ramu   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Shashank Vagal Sent: Sunday, August 30, 2009 1:21 PM To: materials-welding@googlegroups.com Subject: [MW:3083] Re: Regarding the NDT to be carried out for 60 mm thick austenitic stainless steel plates   Nilesh, Why would you do these things? 1. No co60 for 69 mm SS? 2. High Strength and Low Strength Ir 192 are same in their pen power. 3. UT of 60 mm SS - well, can you please pass me the proc? I am curious. Twin crystal for what reasons? Shashank Vagal --- On Sun, 30/8/09, SENTHILKUMAR SWAMINATHAN <skumarswam...

You can go upto 20mm( 1%) for the difference between minimum dia and maximum dia you measure.   Regarding 0.5 mm localised metal loss, you can exercise engineering judgement. You can apply Uw 35 tolerance on undercut  ( 1mm )for this or  UG 16 plate undertolerance of 0.25 mm.   arun   On Sat, Aug 29, 2009 at 11:22 PM, prabhakar s < prabhakars84@gmail.com > wrote: Hi,   Thanks for your valuable information. I have got the clause. It is UG-80 Out of Roundness Tolerance. As per the June 2008 interpretation this clause is applicable for Weld distortion (Vertical Peaking) also.     Regards Prabhakar. S On Sat, Aug 29, 2009 at 5:13 AM, vipin george < vipingeorges@gmail.com > wrote: Hi!Prabhakar, Please refer ASME Sec Viii Div1 ,Edition 2007 Addenda 2008, uw-31 & uw-33 for tolerances. Thanks& Regards, Vipin On Fri, Aug 28, 2009 at 11:12 AM, prabhakar s < prabhakars84@gmail.com > wrote: Hi,     We have procured a Stainless Steel tank ...

I read it wrong. Yes, All ASTM materials are classed under S-Numbers. Thanks Sukamal. arun On Sat, Aug 29, 2009 at 3:53 AM, Sukamal Naskar < sukamalbecmet@gmail.com > wrote: Dear Mr. Tong,   Just a small correction, According to QW-420.2 ( S-numbers) , in this case both the materials are S No. 1 Gr. No1 . If the material is SA106 GR.B then it can be considered as P No1 Gr.1 ( QW-422) , but here the material is ASTM A106 GR.B , hence it is S No.1 Gr.1 ( QW-420.2)  as API 5L GR.B material. As both are same S No. Gr.No ( S1 Gr.1) materials , there will be no problem for the WPS / PQR from the base material point of view.   Regards,   Sukamal Naskar Welding Engineer On Fri, Aug 28, 2009 at 3:26 PM, tong tong < tong2je@gmail.com > wrote: Dear Sohaib, Based on ASME IX, API 5L Gr. B assigned as a S-1 while A 106 Gr. B assigned as a P-1. If procedure qualification testing was done using material assigned an S-Number or S-Number Group Number, the range qual...

Nilesh, Why would you do these things? 1. No co60 for 69 mm SS? 2. High Strength and Low Strength Ir 192 are same in their pen power. 3. UT of 60 mm SS - well, can you please pass me the proc? I am curious. Twin crystal for what reasons? Shashank Vagal --- On Sun, 30/8/09, SENTHILKUMAR SWAMINATHAN <skumarswami@yahoo.co.in> wrote: From: SENTHILKUMAR SWAMINATHAN <skumarswami@yahoo.co.in> Subject: [MW:3082] Re: Regarding the NDT to be carried out for 60 mm thick austenitic stainless steel plates To: materials-welding@googlegroups.com Date: Sunday, 30 August, 2009, 2:44 PM High Curie or Low Curie only helps in time factor. But Ir 192 Penetration is same from Low and High. If am wrong correct me.   S.Senthilkumar --- On Sun, 30/8/09, Yadav Shiva <luvshiv2002@gmail.com> wrote: From: Yadav Shiva <luvshiv2002@gmail.com> Subject: [MW:3080] Re: Regarding the NDT to be carried out for 60 mm thick austenitic stainless steel plates To: materials-welding@google...

High Curie or Low Curie only helps in time factor. But Ir 192 Penetration is same from Low and High. If am wrong correct me.   S.Senthilkumar --- On Sun, 30/8/09, Yadav Shiva <luvshiv2002@gmail.com> wrote: From: Yadav Shiva <luvshiv2002@gmail.com> Subject: [MW:3080] Re: Regarding the NDT to be carried out for 60 mm thick austenitic stainless steel plates To: materials-welding@googlegroups.com Date: Sunday, 30 August, 2009, 2:38 PM hi,            you can go for high strength - 192, but dont go for cobalt 60 since we use for thickness ranging more than 100 to  & 150 mm above. On Sun, Aug 30, 2009 at 11:48 AM, Nilesh Pathare < patharenil@gmail.com > wrote: Hi, If your specification permits for RT or UT you can carry out any of these test for 60 mm Thick S.S. For RT you may need cobalt 60 or High strength iridium 192. For Ultrasonic Testing you shall use the RTD Twin crystal longitudinal ...

1. Both RT and UT Combination will be best. For surface PT is mandatory. 2. UT we can use Shear wave(SW) for fusion zone, Volumetric can use Angle beam  Longitudinal wave(LW) (Single crystal for higher beam distance and Twin for Near zone) 3. Always better to reconfirm with LW probe wherever SW indication, because shear wave redirect. 4. Using LW for fusion zone probably higer sensitivity (More than code requirment)   Regards, S.Senthilkumar --- On Sun, 30/8/09, Nilesh Pathare <patharenil@gmail.com> wrote: From: Nilesh Pathare <patharenil@gmail.com> Subject: [MW:3079] Re: Regarding the NDT to be carried out for 60 mm thick austenitic stainless steel plates To: materials-welding@googlegroups..com Date: Sunday, 30 August, 2009, 2:18 PM Hi, If your specification permits for RT or UT you can carry out any of these test for 60 mm Thick S.S. For RT you may need cobalt 60 or High strength iridium 192. For Ultrasonic Testing you shall use the RTD Twin crystal lon...

hi,            you can go for high strength - 192, but dont go for cobalt 60 since we use for thickness ranging more than 100 to  & 150 mm above. On Sun, Aug 30, 2009 at 11:48 AM, Nilesh Pathare < patharenil@gmail.com > wrote: Hi, If your specification permits for RT or UT you can carry out any of these test for 60 mm Thick S.S. For RT you may need cobalt 60 or High strength iridium 192. For Ultrasonic Testing you shall use the RTD Twin crystal longitudinal wave Angle probes. Regards, Nilesh Pathare. On Sun, Aug 30, 2009 at 10:35 AM, Stephen < stephenipr@gmail.com > wrote: I wanted to know which NDT to be carried out for 60 mm thick austenitic stainless steel plates welded using TIG welding -- Best Regards, Nilesh Pathare --~--~---------~--~----~------------~-------~--~----~ 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...

it depends on design conditions and end user requirements, any type NDT is possible depend on joint configuration, elaborate your query with more details. item description, design conditions, contract requirements. etc. are sure welding 60mm thickness with full GTAW?, is it a FPW? On Sun, Aug 30, 2009 at 12:05 PM, Stephen < stephenipr@gmail.com > wrote: I wanted to know which NDT to be carried out for 60 mm thick austenitic stainless steel plates welded using TIG welding --~--~---------~--~----~------------~-------~--~----~ 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/ 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 docum...

Hi, If your specification permits for RT or UT you can carry out any of these test for 60 mm Thick S.S. For RT you may need cobalt 60 or High strength iridium 192. For Ultrasonic Testing you shall use the RTD Twin crystal longitudinal wave Angle probes. Regards, Nilesh Pathare. On Sun, Aug 30, 2009 at 10:35 AM, Stephen < stephenipr@gmail.com > wrote: I wanted to know which NDT to be carried out for 60 mm thick austenitic stainless steel plates welded using TIG welding -- Best Regards, Nilesh Pathare --~--~---------~--~----~------------~-------~--~----~ 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/ 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. applicabl...

both belongs to S#1 Gr#1 (refer QW 422 of ASME BPV Section IX) yes, you can use since both belongs to same grouping On Sun, Aug 30, 2009 at 9:46 AM, Samimi Mottagi, Alireza < Samimi@mapnagenerator.com > wrote: HI Kindly please inform me that I have two material  A570Gr40 and A570 Gr36 and I want to know where in Asme Standard I can find the P no. and Gr no. of them and according to Asme if I take a PQR on A 570 Gr 36 is it cover the A570 Gr 40 or not. Please give me the coorect address of standard. thanks --~--~---------~--~----~------------~-------~--~----~ 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/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own deci...

I wanted to know which NDT to be carried out for 60 mm thick austenitic stainless steel plates welded using TIG welding --~--~---------~--~----~------------~-------~--~----~ 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/ 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 Kindly please inform me that I have two material  A570Gr40 and A570 Gr36 and I want to know where in Asme Standard I can find the P no. and Gr no. of them and according to Asme if I take a PQR on A 570 Gr 36 is it cover the A570 Gr 40 or not. Please give me the coorect address of standard.     thanks __________ Information from ESET NOD32 Antivirus, version of virus signature database 4379 (20090829) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com --~--~---------~--~----~------------~-------~--~----~ 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/ 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/s...

Dear Amarjti, It's the same. You will also see on the front sheet of the standard that both ANSI and ASME is stated. It is a standard developed by ASME and then adopted by ANSI as an American national standard. Kristian Lund Jepsen -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Amarjit Singh Sent: 29. august 2009 13:55 To: Materials & Welding Subject: [MW:3071] ANSI B16.5 Dear all, Can anybody suggest whether ANSI B16.5 and ASME B16.5 is similar or different? Amarjti singh --~--~---------~--~----~------------~-------~--~----~ 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/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take...

Hi,   Thanks for your valuable information. I have got the clause. It is UG-80 Out of Roundness Tolerance. As per the June 2008 interpretation this clause is applicable for Weld distortion (Vertical Peaking) also.     Regards Prabhakar. S On Sat, Aug 29, 2009 at 5:13 AM, vipin george < vipingeorges@gmail.com > wrote: Hi!Prabhakar, Please refer ASME Sec Viii Div1 ,Edition 2007 Addenda 2008, uw-31 & uw-33 for tolerances. Thanks& Regards, Vipin On Fri, Aug 28, 2009 at 11:12 AM, prabhakar s < prabhakars84@gmail.com > wrote: Hi,     We have procured a Stainless Steel tank from one of our sub contrators. The thickness of the plate is 6mm. They have done hydrotest also. The tank is shifted to our Project site from the Sub contractors yard. We observed a distortion of 3mm near a Longitudinal seam (Both side of the weld seam).   I would like to know the allowable tolerance limit for distortion. Is 3mm acceptable? If it is so please give me the code re...

Dear Friends, Pl give me the reference of respective code with the clause nos for the below mentioned reply. Best  Regards, ----- Original Message ----- From: Sujeet Sangle To: materials-welding@googlegroups.com Sent: Fri, 28 Aug 2009 17:25:37 +0530 (IST) Subject: [MW:3061] Re: piping and pipleine spacing Dear Daniel ,   If you are looking for spacing between the pipe and the ground , it is stated in the API 1104 for p/l ,   If you are looking for spacing between 2 welds  usually it is 3  times diameter , or as per client specification   Usually this is defined as if the lenght is less will cause distorsion if the pup piec is very small in lenght and at the same should see their is a min spacing of 2 " between the HAZ of the 2 welds , in case u need to come to a smaller lenght .   Thanks   Sujeet On Fri, Aug 28, 2009 at 12:48 PM, daniel iordache < daniel.iordache@gmail.com > wrote: dear all, i have 3 pipeline burried ...i ne...

Thanks Daniel for sharing ths information.you send calculation for plates joints.can you please send calculation of welding consumables for pipes(butt joint and fillet joint)     Regards, waqas suleman   On Fri, Aug 28, 2009 at 8:32 AM, Sujeet Sangle < sujeetsangle@gmail.com > wrote: Friends ,   thanks for hte below guide line ,   Here i am looking for more details instead of knowing the whole volume of metal required .   I would lke to know the quantity for each type of electrode as we have for eg TIG root and hot pass followed with 7016 or   root is down hill and the other pasess are up hill ,   Do any one know how to find this or any Excel  program as most of the time need to depend of the supplier or welding formans .   Any helping hand will be appreciated .   Regards   Sujeet On Wed, Aug 26, 2009 at 4:30 PM, daniel iordache < daniel.iordache@gmail.com > wrote: Hi, maybe that help you .... in part .... Regards On Wed, Aug 26, 2009 at 8:...

Dear all, Can anybody suggest whether ANSI B16.5 and ASME B16.5 is similar or different? Amarjti singh --~--~---------~--~----~------------~-------~--~----~ 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/ 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. -~----------~----~----~----~------~----~------~--~---

 respected all , my company is presently deals with the api 487 4c , valve body castings ,where i get d informetion of heat treatment procedure of such casting of valve body . it has two cycles of water quenching and temparing , i also want to knpw the details of chemicals present in the casting on heat treatment.       thanks   regards nitin --~--~---------~--~----~------------~-------~--~----~ 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/ 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. -~----------~----~----~----~------~----~------~--~---

Dear All,   As I know there are 2 penetrations on welding, full and partial. Only that. I am wondering since some equipment manufacturer stated in percent in their specification and document regarding their fillet/corner welding penetration, for example 70%. I did not found it in both ASME IX and AWD D1.1. It means that if we talk about partial penetration, no penetration in percent.   Does anyone know and advise me about this?   Thanks in advance.   Regards, Endri   --~--~---------~--~----~------------~-------~--~----~ 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/ 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!Prabhakar, Please refer ASME Sec Viii Div1 ,Edition 2007 Addenda 2008, uw-31 & uw-33 for tolerances. Thanks& Regards, Vipin On Fri, Aug 28, 2009 at 11:12 AM, prabhakar s < prabhakars84@gmail.com > wrote: Hi,     We have procured a Stainless Steel tank from one of our sub contrators. The thickness of the plate is 6mm. They have done hydrotest also. The tank is shifted to our Project site from the Sub contractors yard. We observed a distortion of 3mm near a Longitudinal seam (Both side of the weld seam).   I would like to know the allowable tolerance limit for distortion. Is 3mm acceptable? If it is so please give me the code reference.   We observed  a Grinding mark of 0.5 mm depth on 6mm thick Shell. what is the allowable limit for this? Is there any code reference?   Your early response in this regard will be highly appreciated.     Regards Prabhakar. S   --~--~---------~--~----~------------~-------~--~----~ To post to this group,...

Dear Mr. Tong,   Just a small correction, According to QW-420.2 ( S-numbers) , in this case both the materials are S No. 1 Gr. No1 . If the material is SA106 GR.B then it can be considered as P No1 Gr.1 ( QW-422) , but here the material is ASTM A106 GR.B , hence it is S No.1 Gr.1 ( QW-420.2)  as API 5L GR.B material. As both are same S No. Gr.No ( S1 Gr.1) materials , there will be no problem for the WPS / PQR from the base material point of view.   Regards,   Sukamal Naskar Welding Engineer On Fri, Aug 28, 2009 at 3:26 PM, tong tong < tong2je@gmail.com > wrote: Dear Sohaib, Based on ASME IX, API 5L Gr. B assigned as a S-1 while A 106 Gr. B assigned as a P-1. If procedure qualification testing was done using material assigned an S-Number or S-Number Group Number, the range qualified is limited to materials that are assigned S-Numbers or S-Numbers Group Numbers (i.e., qualification using a P-Number material qualifies corresponding S-Number materials; qualificati...

Dear all, I have a vessel SS 347 clad on P4 material. The vessel is to be used in H2s service at a temperature of 530 deg C. Specification is asking for autoclave/ H2 disbonding test for weld overlay. what are the basis to decide for the test? Is it neccessary to do at 530 deg C or there is any other permutation or combination to do the test at lesser temp? If yes please guide regards, Amarjit singh --~--~---------~--~----~------------~-------~--~----~ 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/ 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. -~----------~----~----~----~------~----~------~--~---