Materials & Welding

Dear experts,   Could you please clarify following;   If I have qualified WPS with backing & qualified Welder without backing ; with this can we weld single side welded joint without backing.Please reply me in the light of ASME SEC IX.   Thanks in advance   Ali Mhaskar      

width & depth ratio is applicable for each pass (or welds completed with one we lding run). There are narrow gap welding techniques (I am dealing with a pipeline where the thickness is 20mm and the bevel angle is 10 degrees. I want to add another item to what Mr. J.Gerald Jayakumar mentioned: Higher bevel angel helps the gas and slag to get out of molten weld metal. This along with lack of sidewall fusion are defects associated with welded joints with small bevel angel. This becomes critical in welding metals with low melt point such as Aluminum where you have to use 90 degrees joint configuration (instead of conventional 60-70 degrees).   Ramin  Kondori    QC / Welding Engineer           IWE AT 0070     On Wed, Jan 25, 2012 at 6:29 PM, james gerald < gerry_tup@yahoo.com > wrote: Welding Bevel angle is Provided for below reasons, 1. ACCESSIBILITY for the torch and electrode from the Root to the Cap. 2. DECREASE the Heat Conductivity along the bevel edges, more t...

Dear Mohamed: If it is pipeline, go with GMAW or FCAW but if it is a piping spool you'd better use GTAW for root & hot pass and filling & cap with SMAW or FCAW. Whatever filler metal you use (should be Ni-alloyed), do not exceed the base metal strength by more than 10 ksi since it won't do any good except more cost and care during welding. Check the vendor catalogue for instructions.    Ramin  Kondori    QC / Welding Engineer           IWE AT 0070     On Thu, Jan 26, 2012 at 7:50 AM, Fitria Rahman < t.chintaqa@gmail.com > wrote: in most situations, you will receive numerous suggestions with several electrodes falls under E80XX. If you are not going with PWHT, i would rather suggest you to go with E81T1. To me, TIG process is not suitable for large diameter - 30". Rgds 2012/1/25, Lakshman Kumar.B < lakshmankumar4@gmail.com >: > DEAR, > > > > Is GTAW is required? > > We used SMAW or GMAW for the root and remai...

Hi   // I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling mark) more than 12.5% is not acceptable, //   I would like to clarify that, the 12.5% reduction in thk, mentioned by you is taken from material specification. Not from ASME B31.3. B31.3 specifies only the minimum thickness. See 304. So, it is Designers decision to say whether this piping can withstand the intended service or not.   See 328.4.2 (b)(4) and 328.4.3(c) for base metal repairs pertaining to alignment. But, for base material repairs on other areas, B31.3 neither specify nor prohibit.   In these situations, If the thickness is found to be less than the minimum required thickness, and confirmed by Designer/Owner, you may do the repair as per material specification and carryout the necessary inspection.   Note that any repairs on the parent material requires owners/p...

No, cann't be rectified by buttering  or built-up on pipe for new construction. On Mon, Jan 30, 2012 at 6:22 PM, jesti fer < jesti_fer@yahoo.com > wrote: Dear Experts, I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling mark) more than 12.5% is not acceptable, is there any possibility to build up (Buttering) the base metals. Where can I will get the reference   jestifer -- 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. -- To post to this group, send email ...

1 st check with the designer about the required thickness based on pressure calculation and corrosion allowance 2 nd if it is not accepted by the designer … use your welding procedure for filling this portion with filler metal … in my opinion (I did not checked B31.3) you are not in need for reference because you have approved PQR and WPS and it is a welding issue 3 rd 12.5% is a +/- ratio for pipe factory fabricator not a design issue   Senior QC Eng. Ahmed Osman OCI Egypt +20 122 5880434   From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of jesti fer Sent: Monday, January 30, 2012 4:23 PM To: materials-welding@googlegroups.com Subject: [MW:13583] Pipe damaged during fabrication   Dear Experts, I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling m...

You need to make commonly weld build up procedure ad submit to Client for Approval ...Once Client accept the the procedure ...you may proceed for further repair ,It is very important thing is you need to make sure that after the repair base metal completely free from defects by using NDT Methods .  Regards Suresh On Mon, Jan 30, 2012 at 7:52 PM, jesti fer < jesti_fer@yahoo.com > wrote: Dear Experts, I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling mark) more than 12.5% is not acceptable, is there any possibility to build up (Buttering) the base metals. Where can I will get the reference   jestifer -- 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 e...

Dear Experts, I have problem in our site that, we found some fabricated pipes ( as per B31.3) the parent material thickness reduced by grinding (or due to any handling mark) more than 12.5% is not acceptable, is there any possibility to build up (Buttering) the base metals. Where can I will get the reference   jestifer

Hi, Generally not required, but if Client insist to do so and pay for extra cost then go for it. But performing these tests may be useful in future if ever encounter a client requesting the same, in that case you might have to carry out new qualification, i have seen major manufacturers doing these tests just to make sure that they do not re-qualify if ever client request UT,Intergranular corrosion test.. Regards Manpreet Singh On Mon, 30 Jan 2012 14:47:24 +0530 wrote >No requirement of UT & Intergranular corrosion tests. Thanks Regards E.Jegan Hp-65-96163449 > From: Ghafor Mohamad >To: materials-welding@googlegroups.com >Sent: Saturday, 28 January 2012 2:28 PM >Subject: [MW:13576] Ultrasonic Testing & Intergranular Corrosion Testing; G28 Method A for CRO Welding on Carbon Steel with Inconel 625 > > Dear Experts > >I am qualified a PQR for CRO Welding using Inconel 625 on Carbon Steel plate. As per ASME IX, manda...

Hi, Response to Que 1:- Intent of code is to account any expected scenario such as Repairs which would call for multiple PWHT cycles (usually restricted to 3 cycles) therefore simulation heat treatment is to be carried out for same PWHT cycles in order to know exactly by how far, mechanical properties would be degraded. I am not familiar with mentioned code but per ASME Sec viii div 1, UCS-85(c), following variables are to be accounted:- • same heat treatment above A1 • min. 80% of total time at temperatures • similar temperatures, time and cooling rates Response to Que 2;- Just follow qualified PQR within the limits of essential/non-essential variables and forget about given clause. Regards Manpreet Singh On Wed, 25 Jan 2012 20:37:07 +0530 wrote >Dear Experts, As per Axens IN-42.0 Rev. 2.1 Cl. No. 4.1.3, The mechanical tests shall be carried out after heat treatments simulating those anticipated along the fabrication that isPFHT, intermediate H.T., if any, ...

Hi Abdul Ghafor Mohamad ,   ASME Sec-IX is the procedure qualification code, not the code for design or construction of the components. If the component is intended for offshore applications and API-5LD- Specification for CRA Clad or Lined Steel Pipe is applicable  design document then corrosion testing (clause 8.2) as stated below would be required.   May be it would be a good idea to look  at the design documents for details.   Thanks     Pradip Goswami ,P.Eng.IWE Welding & Metallurgical Specialist & Consultant Ontario , Canada . Email-pgoswami@sympatico.ca , pgoswami@quickclic.net   Corrosion Testing A corrosion sensitivity test shall be performed as a manufacturing procedure qualification test (MPQT) on the CRA layers of austenitic steel and N i-base alloy as described below. The purpose of this test is to assure proper manufacturing procedures for austenitic steel and Ni-base all...

Dear Vino, If the Dish Head is welded ,Partial Data Report is Mandatory as per ASME Sec VIII Div 1 ,UG-120 ,4(C) ,form U-2A to be signed by ASME Authorised Inspector.Any weld repair to be cleared by Dish Head manufacturer by approved WPS / PQR with approval of AI and End User. Thanks and Regards, R.Lenin On Jan 26, 1:38 am, Vino Varghese < vinopvargh...@gmail.com > wrote: > Dear All, > > Is it mandatory to request a Partial Data Report(PDR) signed by ASME A.I > from the Contractor who manufactured Dish End for the Pressure Vessel? > Actually the Dish End we requested was an Explosion bonded Clad Dish End, > but dish end manufacturer found some repair on the clad portion and intent > to do repair with Approved WPS/PQR. > > *The Service is LETHAL and the Final Vessel will be subjected to Heat > Treatment  as per UW-2.* > > Whether we can accept this Dish End without a PDR as we are the sole > responsible manufacturer of Pressure Vesse...

Inter-granular test required for 625 material. UT is not require.If client spec specify that ut test require , if u have to do Utb test.\ On Sat, Jan 28, 2012 at 10:28 AM, Ghafor Mohamad < ghaformohamad@gmail.com > wrote: Dear Experts I am qualified a PQR for CRO Welding using Inconel 625 on Carbon Steel plate. As per ASME IX, mandatory test is: Dye Penetration Test Transverse Side Bend Test Chemical Analysis Hardness (location may refer to ISO 15056 Fig 6 for NACE req.) Macro Etch photo What I am confusing is that Intergranular Corrosion (G28 Method A) and Ultrasonic Test is applicable to conduct or not?  Thanks BR; Abdul Ghafor Mohamad -- 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 mea...

No requirement of UT & Intergranular corrosion tests.   Thanks Regards E.Jegan Hp-65- 96163449 From: Ghafor Mohamad <ghaformohamad@gmail.com> To: materials-welding@googlegroups.com Sent: Saturday, 28 January 2012 2:28 PM Subject: [MW:13576] Ultrasonic Testing & Intergranular Corrosion Testing; G28 Method A for CRO Welding on Carbon Steel with Inconel 625 Dear Experts I am qualified a PQR for CRO Welding using Inconel 625 on Carbon Steel plate. As per ASME IX, mandatory test is: Dye Penetration Test Transverse Side Bend Test Chemical Analysis Hardness (location may refer to ISO 15056 Fig 6 for NACE req.) Macro Etch photo What I am confusing is that Intergranular Corrosion (G28 Method A) and Ultrasonic Test is applicable to conduct or not?  Thanks BR; Abdul Ghafor Mohamad -- 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 Fo...

Dear Experts I am qualified a PQR for CRO Welding using Inconel 625 on Carbon Steel plate. As per ASME IX, mandatory test is: Dye Penetration Test Transverse Side Bend Test Chemical Analysis Hardness (location may refer to ISO 15056 Fig 6 for NACE req.) Macro Etch photo What I am confusing is that Intergranular Corrosion (G28 Method A) and Ultrasonic Test is applicable to conduct or not?  Thanks BR; Abdul Ghafor Mohamad -- 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     The post weld heat treatment can be any of heat treatment type like normalizing & tempering, annealing, solution annealing, stress relieving (each having different temperature limits) etc depends upon the type of steel and code of construction. And similarly the time ranges also.   So, the Code restricts that the user to use the same heat treatment and time as encountered in the production joint. That’s why it is restricted to use the PQR at least meeting the 80% of time(s) at temperature(s) as encountered on the production joint. BR M. Vijayan   From: Somkiat Patcharanaruemon [mailto:soiy7777777@gmail.com] Sent: Thursday, January 26, 2012 5:37 AM To: Vijayan Munuswamy Cc: materials-welding@googlegroups.com Subject: Re: 13563] Interpret IX-04-15   Dear Vijayan Thanks you very much for your advice but I still confuse because in QW 407.2 state that  "A change in temperature and time range" ...

Dear Manoj, Refer last two pages for the Metal transfer modes from the attached Document Regards, Vijay On Tue, Jan 24, 2012 at 12:30 PM, manoj john < manojacgnr@gmail.com > wrote: Dear All, I would like to know about mode of  metal transfer in FCAW welding process.  Please share some information regrading short circuting, globular transfer, spray transfer . Thanks in advance. Manoj -- 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. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-we...

in most situations, you will receive numerous suggestions with several electrodes falls under E80XX. If you are not going with PWHT, i would rather suggest you to go with E81T1. To me, TIG process is not suitable for large diameter - 30". Rgds 2012/1/25, Lakshman Kumar.B < lakshmankumar4@gmail.com >: > DEAR, > > > > Is GTAW is required? > > We used SMAW or GMAW for the root and remaining for with FCAW or GMAW which > is more economical and good work progress. > > > > Thanks and Regards................? > > > cid:image001.jpg@01CC3048.5836D9B0 > > Lakshman Kumar.B|Manager |Lanco Infratech Limited > > Plot No 1255 | Sanjeevani chowk | Mahanadi vihar | Cuttack 753004 > > Phone : + 91 671 2445033 | Mobile : +91 9937286851 | www.lancogroup.com > > Go Green|The future will thank you > > > > > > From: materials-welding@googlegroups.com > [mailto: materials-welding@googlegroups.com ] On Behalf ...

Dear Vijayan Thanks you very much for your advice but I still confuse because in QW 407.2 state that  "A change in temperature and time range" and this WPS change only in time range but temperature still the same so this clause shouldn't be essential variable otherwise  why the code shouldn't state"A change in temperature or time range" instead of "A change in temperature and time range" please advice. BRG Solomon 2012/1/25 vijayan < vijayan.m@madinagulf.com > Hi Because the wps is not written as per the QW.407.2. it means the WPS can support only up to 108 minutes (not 3.5 Hours) BR M.Vijayan -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of solomon Sent: Wednesday, January 25, 2012 4:45 AM To: Materials & Welding Subject: [MW:13563] Interpret IX-04-15 Dear Expert . According to interpretation below could you please explain why the answer is ...

Dear All,   Is it mandatory to request a Partial Data Report(PDR) signed by ASME A.I from the Contractor who manufactured Dish End for the Pressure Vessel? Actually the Dish End we requested was an Explosion bonded Clad Dish End, but dish end manufacturer found some repair on the clad portion and intent to do repair with Approved WPS/PQR.   The Service is LETHAL and the Final Vessel will be subjected to Heat Treatment  as per UW-2.   Whether we can accept this Dish End without a PDR as we are the sole responsible manufacturer of Pressure Vessel?   Please let me know the relevant Records/Reports needed as per ASME Sec VIII Div 1 to be instructed to our Sub contractor while deliverying this Dish End and the Code reference.   Looking forward all your postive reponse ASAP...   Thanks & Regards Vino -Doha, Qatar -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@google...

Because the supplementary essential variables must be met, the proposed WPS is not allowed - i.e. in QW-407.2 there is a maximum limit on time at temperature. Specifically, "The procedure qualification test coupon . . . at least 80% of the aggregate time at temperature." Thus the maximum time (Tmax) at temperature is : (Tqual/Tmax) X 100 = 80 Or Tmax = Tqual X ( 100/80) = 1.5 hr X (5/4) = 1.875 hours So the PQR does not have a long enough hold time to support the proposed WPS's 3.5 hour hold time. John A. Henning Senior Welding & Materials Engineer -----Original Message----- From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of solomon Sent: Tuesday, January 24, 2012 7:45 PM To: Materials & Welding Subject: [MW:13563] Interpret IX-04-15 Dear Expert . According to interpretation below could you please explain why the answer is "No". In my understan...

Welding Bevel angle is Provided for below reasons, 1. ACCESSIBILITY for the torch and electrode from the Root to the Cap. 2. DECREASE the Heat Conductivity along the bevel edges, more the bevel angle lesser the Heat conductivity 3. PROPER FUSION along the bevel edges, narrow the bevel will result in improper fusion(lack of side wall fusion) 4. BETTER FLOAWABILITY of the Liquid metal. From the above it is clear that for some special materials like DSS, decrease in weld bevel will result in more conductivity and increased Heat input along the bevel edges and HAZ, may be one of the reason for its restriction.   Thanks & Regards J.Gerald Jayakumar 0091-9344954677 From: N VENKATESWARA PRASAD <weldengr.velosi@gmail.com> To: materials-welding <materials-welding@googlegroups.com> Sent: Wednesday, January 25, 2012 10:06 AM Subject: [MW:13564] Decrease in bevel angle - Essentail variable as per Shell DEP Dear All, As per  Shell DEP 30.10.60.18, the d...

Mohammed Maher, You can do CSWIP 3.2 with out attending CSWIP 3.1 But You have to attend CSWIP 3.1 exam then immediately the day after you can sit CSWIP 3.2 Once if you passed CSWIP 3.1 then only TWI allows you to attend CSWIP 3.2 I am Navaneetha from England, My suggestion is CSWIP 3.1 is not at related to expeience. Even 15 years experience holder in Welding usually fails in CSWIP 3.1 The Unique of CSWIP 3.1 is Measuring & Recording the Weld defects, Its like a Police Training. How much knowledge you have to cathch the weld defects. So bettet attend CSWIP 3.1 & wait for one year.Then attend CSWIP 3.2 In CSWIP 3.2 you have good & deep knowledge in Heat Treatment, RTFI otherwise CSWIP 3.2 is Big bang for you Best of Luck Regards NAV On Jan 22, 12:08 pm, mohamed maher < mohamed.ahmed.ma...@gmail.com > wrote: > dear, all > I need to take CSWIP 3.2 but I am not certified CSWIP 3.1 and > according to Requirements for the Certification of Visual Welding > ...

this always associated with width & depth ratio. the ratio supposed to be in acceptable range - should not be below 0.8. Suppose the ratio exceed 0.8, it lead to solidification crack. Depth & width ratio is one the factors contribute solidification crack. Rgds 2012/1/25, N VENKATESWARA PRASAD < weldengr.velosi@gmail.com >: > Dear All, > > As per Shell DEP 30.10.60.18, the decrease in angle is essentail > variable. What is concept behind it? Is is applicable for Compound/ > composite angle joint design also. As per this joint design up to 19 > mm the bevel will be 37.5 degrees, later it will be only 10 degres. > > > My concept is the anlge is only for accessability and in case of DSS, > Nickel alloys higher anlge for better wetting. It should not > applicable for carbon steels. > Please debate on this. > > The Clause as per DEP as given below: > > > 11.1 Add new clause 11.1.4 It is the Manufacturer's responsibi...

Dear Mr Mohmad,                     First try to aquire 3.1 and then try 3.2. In 3.2 itself there are 2 category do you know that? so please try 3.1 and try 3.2 with RT or without RT interpretation. Because many dont get 3.1 eventhough they have got very good qualifications and experiences so I would suggest you to attend the course where you would gain something that you dont learn in college and field of welding.             Good luck Regards   IK     On 23 January 2012 14:17, sajidalam mohd. < engineer_makes_world@yahoo.co.in > wrote: yes you can write 3.2 directly.but you have to subbmitt required documents.   regards md.sajid alam From: mohamed maher < mohamed.ahmed.maher@gmail.com > To: Materials & Welding < materials-welding@googlegroups.com > Sent: Sunday, 22 January 2012 3:08 PM Subject: [MW:13541] need your help please : Can I take CSWIP 3.2 without hold CSWIP 3.1 ? dear, all I need to take CSWIP 3.2 but I am not certif...

Hi   See below the interpretation. The weld build thickness may be considered as governing thickness for PWHT. but, B 31.3 does not address this weld build up.   However, as per material specification ( I think you are using SA105), any weld repair requires heat treatment.  See below.     B3 1.3 Interpretations No. 14 14-01 Interpretation: 14-01 Subject: ASME B31.3b-1994 Addenda, Para. 331.1.3(b), and Table 331.1.1, Heat Treatment Requirements Date Issued: June 22, 1995 File: B3 1-94-064 Question (1): In accordance with ASME B3 1.3-1993 Edition, Addenda b, does the portion of para. 331.1.3@) which states “the thickness through the weld in any plane” refer to the weld thickness? Reply (1): Yes. Question (2): In accordance with ASME B31.3-1993 Edition, Addenda b, does the minimum material thickness stated in para. 331.1.3(b) refer to the requirements of Table 331.1.1? Reply (2): Yes. Question (3): In accordance with ASME B31.3-1...