Materials & Welding

Hi Nilesh,   The voltage before striking the arc is called open circuit voltage. and once we strike the arc, the current increases, voltage decreases and after that arc is maintained at sufficient arc gap and the voltage is termed as arc voltage.   Normally arc voltage during SMAW welding is kept at 24-27 volts and OCV shall not be higher.    Mukesh    On Sat, Feb 28, 2009 at 11:15 AM, nilesh parsekar < nilesh4878@gmail.com > wrote: Dea All,               I want to know what happens to the voltage when we strike the arc.Is it drops to zero and then gradually increases.   thanks -- Nilesh Parsekar Sr QC Co-ordinator Exterran Belleli Energy Fujairah - Sidem Mobile - 0506561785 --~--~---------~--~----~------------~-------~--~----~ 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-we...

Buttering or weld built up for 55 mm thickness is not admissable nor economical. It also induces high stresses and  may result in plate edge distortion. Maintaining thickness is nother problem. Placing a bcking strip also calls for more weld consumables. best way is to provide a plate of  150 mm or more width, trim the  existing shell suitably and weld 2 seams instead of weld built up for 55 mm. Please check whether API-653 suggest any minimum shell width. T.B.N.Tagore On Sat, Feb 28, 2009 at 4:29 AM, Radhakrishnan Venkatraman < r_venkat68@hotmail.com > wrote: 55 mm gap should not be done with buttering.here the thickness is  23.4mm.Presume that the gap is produced for vertical welding the problem shall be solved by providing backing plate of suitable thickness say 12mm or even 16mm.UT results shall be checked for crack or other weld defects Technical details regarding backing weld shall be availed from AWS D 1.1     Regards R.Venkataraman Date: Sat, 28 Feb 2009 10:56:...

Hi,   Your intention is Built up not buttering   On Sat, Feb 28, 2009 at 2:56 PM, pradeep kumar hormis < pkhormis@gmail.com > wrote: Dear All!!!   We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.   There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.   plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70. -- PRADEEP KUMAR HORMIS --~--~---------~--~----~------------~-------~--~----~ 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, ...

U2 and U3 are totally different U2-Alternative rules for construction of pressure vessels U3 -Alternative rules for construction of high pressure vessels Two different set rules can't be compared regards R.venkataraman    From: paresh@ramsis.com.bh To: materials-welding@googlegroups.com Subject: [MW:1665] Highlights for ASME sec VIII, Div2 (U2) & ASME sec VIII, Div 3 (U3) Code. Date: Sat, 28 Feb 2009 13:45:29 +0300 Dear all,   Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.   Thanking you,   Regards, Paresh 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/ The views expressed...

As per API 650 clause 5.2.3.1 it is very much clear that plates to be joined by butt welding shall be matched accurately and retained in position during welding operation. Also nowhere it is indicated about buttering or any other means to adjust such dimensional deviation which is beyond qualified WPS. Only alternative is to replace shell plate /add one more such shell plate which will not violate Tee joint distance as per code. Bharat B. Gole   Date: Sat, 28 Feb 2009 10:56:43 +0400 Subject: [MW:1663] Buttering on Plate From: pkhormis@gmail.com To: materials-welding@googlegroups.com Dear All!!!   We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have...

Dear All, have a good day. please can any one explain about knuckle joint. if possible please attach sketch thanks with regards, m javed --~--~---------~--~----~------------~-------~--~----~ 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,   Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.   Thanking you,   Regards, Paresh 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/ 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. -~----------~----~----~----~------~----~------~--~---

55 mm gap should not be done with buttering.here the thickness is  23.4mm.Presume that the gap is produced for vertical welding the problem shall be solved by providing backing plate of suitable thickness say 12mm or even 16mm.UT results shall be checked for crack or other weld defects Technical details regarding backing weld shall be availed from AWS D 1.1     Regards R.Venkataraman Date: Sat, 28 Feb 2009 10:56:43 +0400 Subject: [MW:1663] Buttering on Plate From: pkhormis@gmail.com To: materials-welding@googlegroups.com Dear All!!!   We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.   There was n...

Dear All!!!   We are doing some Tanks as per API 650. In one of that tank ,we faced a problem like shortened the lingth of plate..and JOINT GAP became more than the required 'Root gap'. Almost   "55mm" we got .So we thought about 'Buttering'. But in API 650 not mentioned any thing about 'buttering'. So which standard we have to follow for it, and what are the test we have to conduct over there.   There was no PWHT as per WPS,Pre heat was only upto 40 ^0 C.   plate thickness is 23.4mm- 'Double 'v' groove' , ASTM 573.GR 70. -- PRADEEP KUMAR HORMIS --~--~---------~--~----~------------~-------~--~----~ 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 ...

Dea All,               I want to know what happens to the voltage when we strike the arc.Is it drops to zero and then gradually increases.   thanks -- Nilesh Parsekar Sr QC Co-ordinator Exterran Belleli Energy Fujairah - Sidem Mobile - 0506561785 --~--~---------~--~----~------------~-------~--~----~ 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. -~----------~----~----~----~------~----~------~--~---

the nominal thickness of the pipe is the thickness ordered by client or design thickness on which the tolerances as per api 5l is applied tolerance are different for different nominal thickness as per new api 5l  Dinesh verma On Fri, 27 Feb 2009 22:04:19 +0530 materials-welding@googlegroups.com wrote Hi Mr. Babu,   Nrmally Nominal thickness is the thickness which we can take w.r.t schedule wheras the actual thickness can be +/- 12.5% of the nominal thickness.   Mukesh Lurgi On Sat, Feb 14, 2009 at 9:49 PM, babu k wrote: Hi,   Let me introduce my self, I am Babu Working in Singapore.   I would like to '' What is the Physical Meaning of Nominal thickness''  which is referred in all API codes and How it is differ from the Actual thickness,   Thanks & Regards,   K.Babu   --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send em...

Hi Mr. Babu,   Nrmally Nominal thickness is the thickness which we can take w.r.t schedule wheras the actual thickness can be +/- 12.5% of the nominal thickness.   Mukesh Lurgi On Sat, Feb 14, 2009 at 9:49 PM, babu k < kbabupsg@gmail.com > wrote: Hi,   Let me introduce my self, I am Babu Working in Singapore.   I would like to '' What is the Physical Meaning of Nominal thickness''  which is referred in all API codes and How it is differ from the Actual thickness,   Thanks & Regards,   K.Babu   --~--~---------~--~----~------------~-------~--~----~ 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 dec...

Hi,   When u qualify a welder through the WPS, you should follow the WPS grrove design as per D1.1(See 4.18.3) ;   otherwise follow the configuration given in D1.1  ;   Thanks;   K.Babu   Welding Engineer   Singapore       On Wed, Feb 25, 2009 at 4:09 PM, Radhakrishnan Venkatraman < r_venkat68@hotmail.com > wrote:   From: r_venkat68@hotmail.com To: materials-welding@googlegroups.com Subject: Essential variable as per AWS D 1.1 Date: Tue, 24 Feb 2009 16:54:42 +0000 My dept was having one PQR qualified as per AWS D1.1 with double V Groove weld. When we try to qulify our welders for a specific project,where in the requirement is for single v groove weld. We have Conducted the test with 16mm plate (Single V preparation) The third party qualified the welders.Is this ok   Because as per AWS D 1.1 groove configuration is an essential variable   Is any one clarify this   Regards R.Venkataraman   Need more space to upload pictures? Get 25 GB online storage with W...

First of all, let me clarify that A333 material is intended for low temperature service only. So it is unlikely that the material is not impact tested except for grade-11 ASTM A333 calls for impact testing (except grade-11) as per the material standard itself when the thickness exceeds 3 mm. (Refer Para-8 and Table-5). So far as the impact testing of material (as per design standard) is concerned, I feel it is very well explained in Para 323.2.2(particularly sub para a) and Table 323.2.2. Other/subsequent para's are also elaborative for the exact requirement for various materials. Also, refer the Fig. 323.2.2A for other materials. I hope this has clarified. As a matter of fact, I could not follow your exact question. If you have any particular doubt, pl. specify otherwise, it seems to be a hypothetical question. Best regards, Prasad "Faigal Fernando ...

So far as I know the Full Radiography is the term used for PV fabrication. It is defined in ASME sec.VIII/UW-11. It is not 100% radiography as some of the joints are excluded from the requirement of RT (for e.g. nozzle butt welds with DN 250 and smaller that are thinner than 29 mm) On the other hand, 100% Radiography is the term used in piping fabrication. And it implies 100% radiography of all the butt joints. But some times Client may ask 100% RT in PV also. Hope it clarifies. Best regards, Prasad Sudipto_Banerjee@ fwuk.fwc.com Sent by: To materials-welding materials-welding@googlegroups.com @ googlegroups.com cc ...

Dear Faigal, Yes, Impact test is mandatory requirement as per material specification of SA 333 Gr -  1,3,4, 6,7,9 & 10, even it is not designed for low temperature services. Regards, Sridhar Doddapaneni On Thu, Feb 26, 2009 at 5:36 PM, Faigal Fernando Agbanawag < faigal.agbanawag@czfp.com > wrote: Dear all,   Can anybody elaborate chapter III of B31.3 regarding the impact test requirement of ASTM A333 where in section 323.2.2 states the limitation concerning impact testing  of a particular material. Is it mandatory for A333 to have an impact test ?,  where low temperature service is not an issue.   Your response are highly appreciated.   Regards,   Faigal Fernando Agbanawag Sr. Piping Engineer Clough ZFP T +966 3 8828818 Ext: 241 F +966 3 8828622 M +966 (0) 507780576 Disclaimer : This email and any files transmitted with it are confidential and intended solely for the use of the addressee(s) named herein. If you are no...

Dear Sir, I'm not familiar with the B31.3 but I know that all material according to ASTM A333 have requirements for Impact testing for material certification, except for Grade 11, see chapter 8 of ASTM A333 . This means that all other material grades must have impact values mentioned on their material certificate. Depending on the materials grade also the test temperature is laid down in the ASTM A333, see table 5 of this specification. The minimum requirements for each grade are mentioned in table 4. Some grades even requires measuring lateral expansion of the impact specimens. If it concerns welded pipe also impact values are required for the weld area. This is completely independent of the specification B31.3 If you can specify the grade of material I can send you the requirements for this grade. Best Regards, Herman Pieper On 26 feb, 13:06, "Faigal Fernando Agbanawag" < faigal.agbana...@czfp.com > wrote: > Dear all, > > Can anybody elaborate chapter III...

I want to know the Difference between Full & 100 % radiography and the code/cases that is being spelt out. Thanks. Best Regards, Sudipto Banerjee This email and the information it contains:- (a) is intended for the person(s) or organisation(s) named above and for no other person(s) or organisation(s); and (b) may be confidential, legally privileged and protected in law. Unauthorised use, copying or disclosure of any of it may be unlawful. If you have received this email in error, please contact the sender immediately at his/ her email address or at Postmaster@fwuk.fwc.com and delete this email and any attachments. Please note that any views or opinions in this email are those of the author and do not necessarily represent those of Foster Wheeler Energy Limited or any of its associated companies. Unless otherwise stated, neither this email nor any attachments constitute an offer and nor are they intended to create a contractual relationship or be contractually binding. This email h...

Dear all,   Can anybody elaborate chapter III of B31.3 regarding the impact test requirement of ASTM A333 where in section 323.2.2 states the limitation concerning impact testing  of a particular material. Is it mandatory for A333 to have an impact test ?,  where low temperature service is not an issue.   Your response are highly appreciated.   Regards,   Faigal Fernando Agbanawag Sr. Piping Engineer Clough ZFP T +966 3 8828818 Ext: 241 F +966 3 8828622 M +966 (0) 507780576 Disclaimer : This email and any files transmitted with it are confidential and intended solely for the use of the addressee(s) named herein. If you are not the intended recipient or addressee, you should not use, disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of "CZFP". Warning : Although reasonable precautions have been taken to ensure...

 change in I & E is a non essential variable for GMAW process( QW-406.8) if you mention the  current range on the WPS with higher difference than what you have qualified for the PQR, then you no need to qualify for the new procedure, and can convince your client as the actual Amp. is within the range specified on the WPS.   Regards   On 2/26/09, sandy kumar < sandy001987@gmail.com > wrote: hi everone  I have one query. If anyone have its answer then please give me at my email sandeepkumar63@rediffmail.com I have qualified my procedure at a amperage range of 160-180. i am doing my actual weld uptp 240 A. I have MIG machine of CLOSS make in which I have to enter only require WFS and it takes other parameter automatically. For example I am doing welding at 220 A and actual Amperes which are coming in a range of 220 plus minus 20. So question is that What proof shall I give to prove this variation in current as per ASME Sec-9 to the customer as the machine is showing th...

Thank you Mr. John Henning for your valuable information.   Regards, Muhammed Ibrahim PK 2009/2/25 John Henning < jhenning@deltak.com > The short answer is no. When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's.  If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate.  I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded. Then, you can write the following WPS's: GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW and SMAW deposit to the maximum thickness of 8mm.  The base metal thickness is limited for both process as the GTAW weld can ONLY be p...

hi everone  I have one query. If anyone have its answer then please give me at my email sandeepkumar63@rediffmail.com I have qualified my procedure at a amperage range of 160-180. i am doing my actual weld uptp 240 A. I have MIG machine of CLOSS make in which I have to enter only require WFS and it takes other parameter automatically. For example I am doing welding at 220 A and actual Amperes which are coming in a range of 220 plus minus 20. So question is that What proof shall I give to prove this variation in current as per ASME Sec-9 to the customer as the machine is showing the set current is 220 so what proof I shall to them for acceptance of this variation.   Sandeep  --~--~---------~--~----~------------~-------~--~----~ 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/...

From a weldability perspective, both grades are weldable with similar welding procedures, consumables and processes. Both materials are classified as S-No 1 Group 1 materials in ASME Section IX. The difference in the seamless and seamed nature of the two grades may have an influence on pipe dimensions, for eg the seam welded Grade B pipes may be expected to have Local OOR at the long seam. This will however be of significance only for mechanised or automatic welding. Though the 5L Grade B pipes may be impact tested as per the material specification, the design code requirements will apply for material, weld and HAZ impact testing (Refer B31.3 or ASME section VIII div 1 as applicable). Rgds Sayee -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Quality Sent: 25 February 2009 15:32 To: materials-welding@googlegroups.com Subject: [MW:1642] Re: FW: API 5L Gr B and A 106 Gr B Dear all, This is not true always. (u...

Dear all,   I am not familiars with  ASME  sec VIII, Div 3 (U3) Code, I required expert inputs. Can any body give me comparison highlights for ASME  sec VIII, Div2 (U2) &  ASME  sec VIII, Div 3 (U3) Code.   Thanking you,   Regards, Paresh 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/ 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. -~----------~----~----~----~------~----~------~--~---

Good Explanation by John, I would like to correct the Qualified thickness range in the example. It should be 4.8 throgh 200 mm. (Of course, it is minor correction and probably due to use of conservative range for multiple standards of qualification.) Also, I would like to add as follows: It is very common to mix up two variables (BM thickness -T and weld thick. t). If we separately deal with the two variables, there will be no confusion. I would suggest VJ to again look at your PQR's with this information. The each of the PQR's (GTAW & SMAW) is welded with single process only or there are multiple processes. In case of multiple processes, the t and T will be different. Best regards, Prasad "John Henning" <jhenning@deltak. com> ...

Dear John, Thank you very much for this explanation with good example. I would like to know that in your given example , how do you calculated the base material thickness range ( 10mm - 200mm ) instead of 5mm - 200mm . kindly advice.   Thanking you, Regards Sukamal Naskar Welding Engineer   On 2/26/09, John Henning < jhenning@deltak.com > wrote: The short answer is no. When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's.  If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate.  I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded. Then, you can write the following WPS's: GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm SMAW on plate, 1.5mm to 20mm, with deposit thickness...

Per QW-200.4 (b). When a process is used for the root weld and is qualified on a base metal 13mm and thicker, then that PQR can be used in combination with another PQR qualified for any greater thickness to write a single WPS. The root process is limited to 2 times the deposit thickness performed on the first PQR. In your particular case the base metal qualified thickness is 10mm to 200mm, SMAW may be used for the root weld (and hot passes) to a maximum deposited thickness of 30mm, SAW is qualified to a maximum deposited thickness of 200mm. Another example: PQR 1 - Qualified on 15mm plate, root weld GTAW with deposit thickness 5mm, balance of weld SMAW (10mm) PQR 2 - SAW qualified on 40mm plate (back gouged and back welded) with deposit thickness 40mm (Assuming all other essential variables are satisfied and impacts are not required) WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill: Qualified base metal thickness ran...

The short answer is no. When combining multiple PQR's to support a single WPS, you are limited to the most restrictive essential variable or supplemental essential variable found on the PQR's. If I understand correctly, in your case you have one PQR using the GTAW process qualified on 4mm thick plate and a second PQR using the SMAW process on 10mm thick plate. I assume only GTAW or SMAW was used either PQR and that the full thickness of base metal was welded. Then, you can write the following WPS's: GTAW on plate, 1.5mm to 8mm, with weld deposit thickness to 8mm SMAW on plate, 1.5mm to 20mm, with deposit thickness to 20mm Combined GTAW and SMAW, plate thickness qualified 1.5mm to 8mm, both GTAW and SMAW deposit to the maximum thickness of 8mm. The base metal thickness is limited for both process as the GTAW weld can ONLY be performed on base metal to a maximum of 8mm thick. The only exception can be found in QW-200.4 (b). When a process is used for the root weld and is ...

The flatolet is basically "olet" to be used on flat surface or on the very large run sizes (where the difference of curvature becomes less and less significant. As per bonney forge catalogue, the weldolet for run sizes larger than 36" (DN 1800) will be considered as flatolet. Please note that one needs to specify this in the purchase order whether you require flatolet. Hope to have clarified Best regards, Prasad "Sreejith.Nair" <fizzyshadow@gmai l.com > To Sent by: materials-welding@googlegroups.com materials-welding cc @ googlegroups.com ...

Sreejith,   Olet which will be in Flat. Assy in plate etc.. Find attached fig.   Regards, S.Senthilkumar --- On Wed, 25/2/09, Sreejith.Nair <fizzyshadow@gmail.com> wrote: From: Sreejith.Nair <fizzyshadow@gmail.com> Subject: [MW:1639] flatolet To: materials-welding@googlegroups.com Date: Wednesday, 25 February, 2009, 8:12 PM can anybody please explain what a flatolet is?? it would be a great help if a picture of the same can be posted. Add more friends to your messenger and enjoy! Invite them now. --~--~---------~--~----~------------~-------~--~----~ 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 decis...

Dear all, This is not true always. (use as an alternate to each other). Some occasions one standard pipe can not be replaced/used in place of other, depending upon design/ service requirement. The common similarity between these pipes are Tensile & yield strength property. ASTM A 106 pipe is seamless by default (Always), whereas API 5L may be manufactured as welded construction as well. Some specific cases, designer specifies only seamless pipes (A 106) are acceptable, you may not able to replace it with API 5L Gr B (welded) pipe. A 106 need not be tested for notch toughness. Where as API 5L pipes can be 'demanded' for notch toughness test. At locations/conditions where materials need to be have notch toughness & resist crack propagation, API 5L certified pipes are recommended & preferred rather than A 106. Regards, Sanjeevan ----- Original Message ----- From: "rutvik dixit" < rutvikdixit@yahoo.co.in > To: < materials-welding@googlegroups.com ...

can anybody please explain what a flatolet is?? it would be a great help if a picture of the same can be posted. --~--~---------~--~----~------------~-------~--~----~ 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 Rafique, You can use both as alternate to each other.for detail please refer mech,chem props,service condition in their respected API and ASTM spec. Regards, Rutvik --- On Tue, 24/2/09, rafique naik < rafiquenaik@hotmail.com > wrote: > From: rafique naik < rafiquenaik@hotmail.com > > Subject: [MW:1619] FW: API 5L Gr B and A 106 Gr B > To: "welding group" < materials-welding@googlegroups.com > > Date: Tuesday, 24 February, 2009, 11:57 PM > Dear ALL, > > Please explain the difference as asked my Mick....., I am > forwarding this mail to the group because I know this mail > will reach to experts and they can reply in better way. > > Thanks and regards, > > Rafique > > From: crc1199@hotmail.com > To: rafiquenaik@hotmail.com > Subject: API 5L Gr B and A 106 Gr B > Date: Tue, 24 Feb 2009 13:15:47 -0500 > > > > > > > > > Dear Rafique, > > Please explain me w...

Dear All,   With ref to QW 200.4 (b) combination of process PQR A - 15mm with SMAW process PQR B- 40mm with SAW process   Wht is the base metal thk. qualified if we cobines WPS SMAW + SAW Will it be 5 to 30mm(with both SMAW & SAW - 30mm  or 5 to 200mm( with SMAW-30mm & SAW 200mm)   If any interprtation to this condition is there then it will very helpful   Thanks & Regards Muhammed Ibrahim PK --~--~---------~--~----~------------~-------~--~----~ 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 Muhammad, The strength is not an essential variable even though the Tensile Test is essential part of the Procedure Qualification. Hence the PQR in your case, can support both P=1, Gr. 1 and Gr. 2 materials. The strength is guaranteed for material by material standards while the purpose of the PQR is to see that the strength of the joint is not adversely affected and hence the acceptance criterion for Tensile Test is accordingly (Refer QW-153.1). Hope to have clarified, Best regards, Prasad Sukamal Naskar <sukamalbecmet@gm ail.com > To Sent by: materials-welding@googlegroups.com materials-welding cc @ googlegroups.com ...