Materials & Welding

Nowadays plates come with cross rolling, they are rolled at 90degrees in consequent rolling operations. 2011/2/28 sandy < sandeepdhiman63@gmail.com > Hi The main reason is that the mechanical properties are better in the rolling direction compare to transverse direction. But it is not mandatory that you weld in this way. If you weld the material in the way wht u r asking may be possible that you will get lesser strength or other required things as compare to long. side welding. Regards Sandeep On Feb 28, 5:29 am, "Kathalingam Babu" < kathalingam.q...@ppl.com.sg > wrote: > Hi > > It is only optional, not mandatory in many codes. > > Due to the fact that, there is variation in mechanical properties in Trans > direction. > > Thanks & Regards, > > K. Babu > > > > ----- Original Message ----- > From: "Pratik Kshirsagar" < pratiks...@gmail.com > > To: "Materials & ...

Dear Mr.Abhay, Have you refer the trailing mail table ASME B 31.3 ,342.3.2 table then you will ask the next question. I think just like feeding Everything is not good refer it for internal protrusion or excess penetration limits. Regrds, PSR On 28 February 2011 18:01, Abhonkar, Abhay (NAR) < AAbhonkar@dresser-rand.com > wrote: My question is on excess penetration for root and not for excess reinforcement. Generally it is to be minimum for smooth flow of media but I want to know acceptance standard from ASME sec IX or B 31.3.     Regards, Abhay Ext 448   IMPORTANT NOTICE: This email may be confidential, may be legally privileged, and is for the intended recipient only. Unauthorized access, disclosure, copying, distribution, or reliance on any of it by anyone else is prohibited and may be a criminal offense. Please delete if obtained in error and email confirmation to the sen der. From: materials-welding@googlegroups.com [mailto: ...

It is because the gauge installed at 30 m height shows only the fluid presssure inside the circuit while the one installed 30 m lower not only shows the fluid pressure but also the head of the fluid above it i.e --> pressure at 30 m lower gauge = fluid pressure + (density of fluid * acc due to gravity * height). pressure at  30 m high gauge = fluid pressure ----- Original Message ----- From: Pablo J Acelajado To: materials-welding@googlegroups.com Sent: Sun, 27 Feb 2011 16:10:19 +0530 (IST) Subject: [MW:10041] RE: 10032] hydro test February 27, 2011   Hi!   Pressure is equal to height x density. P (psi) = [30 meters x 3.28 ft/ meter x 12 inches/ft] x [62.4 pounds per cu. ft.  x 1/1728] = 42.64 psi,  which is roughly equal to 3 bars.   Best regards. PJA From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of k.ilangkumaran ilangkumaran Sent: Saturday, February 26, 2011 9:59 PM T...

Hii First you need to specify whats construction code you are using ... I think particularly there is no code for In Service welding WQT test,Generally we arre following ASME SECTION IX . Suresh On 2/28/11, joshi jaydeep < jaydeep.p.joshi@gmail.com > wrote: > Dear all, > > As per the scope of API 1104, It is restricted to be used for CS and LAS > material. > > Which code is to be followed for In-service welding qualification of SS pipe > line. > > > > *Jaydeep Joshi | Welding Engineer, TDW India Limited* > > Plot No 16 | Phase –III | Alindra – Savli G.I.D.C | Taluka : Savli | > Vadodara – *391 775* > > *Board* : +91-2667- 619900 | *Fax *: +91- 2667- 619501| *Extension : 7845* > > E-Mail : jaydeep.joshi@tdwilliamson.com < samyak.sahani@tdwilliamson.com > | > * www.tdwilliamson.com * > > Cell: +91 9978959626 > > P *Before printing, Think about ENVIRONMENTAL responsibility* > > -- > To post to t...

Dear all,  I have a procedure in which impact testing should have been done as per  ASTM A370 but it has been done as per ASTM E23 Is there any difference between the standard on how the impact tests are conducted? Would the difference effect the final values? tha material was UNS 31803 pipe and was tested at minus 50 degree centigrade. 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 decisions w.r.t. applicable code/standard/contract documents.

Please see (Criterion Value Notes for Table 341.3.2) B31.3 Depends on thickness From: Abhonkar, Abhay (NAR) Sent: Monday, February 28, 2011 4:01 AM To: materials-welding@googlegroups.com Subject: RE: [MW:10053] excess penetration for butt weld joints   My question is on excess penetration for root and not for excess reinforcement. Generally it is to be minimum for smooth flow of media but I want to know acceptance standard from ASME sec IX or B 31.3.     Regards, Abhay Ext 448   IMPORTANT NOTICE: This email may be confidential, may be legally privileged, and is for the intended recipient only. Unauthorized access, disclosure, copying, distribution, or reliance on any of it by anyone else is prohibited and may be a criminal offense. Please delete if obtained in error and email confirmation to the sen der. From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Fitria Rahman...

My question is on excess penetration for root and not for excess reinforcement. Generally it is to be minimum for smooth flow of media but I want to know acceptance standard from ASME sec IX or B 31.3.     Regards, Abhay Ext 448   IMPORTANT NOTICE: This email may be confidential, may be legally privileged, and is for the intended recipient only. Unauthorized access, disclosure, copying, distribution, or reliance on any of it by anyone else is prohibited and may be a criminal offense. Please delete if obtained in error and email confirmation to the sen der. From: materials-welding@googlegroups.com [mailto: materials-welding@googlegroups.com ] On Behalf Of Fitria Rahman Sent: Sunday, February 27, 2011 1:00 PM To: materials-welding@googlegroups.com Subject: Re: [MW:10036] excess penetration for butt weld joints   Please refer to table 341.3.2 ASME B31.3 for criteria of height of reinforcement 2011/2/24 Abhonkar, Abhay (...

dear no,but it is recommended the filler be low H2 ELECTRODE(7018,7018-1,etc.)  H.KASHKOUSHA From: GRH <grhashemi2010@gmail.com> To: Materials & Welding <materials-welding@googlegroups.com> Sent: Mon, February 28, 2011 9:40:34 AM Subject: [MW:10051] Welding filler metal for H2+HCBN TRACES medium ( hydrocracker unit) Dear Mr./Miss./Mrs. The air cooler in HYDROCRACKER unit (oil refining plant)have the below specifications,Please guide me about the welding procedure ,filler metal and any requirements in conform to service. design pressure:55.3 bar/f.v design temperature:171 celsius fluid circulated: H2+HCBN TRACES X-ray examination:spot PWHT:yes (Max. weld hardness;200 brinnel) Materials:SA-516Gr.60 , SA-105 , SA-234WPB Headers Thk.:30 mm. This air cooler is in first steps of construction and only the main drawing is available.the old equipment shall be replaced by the new. Any supplementary date or detail is out of availability. in API 661 some ...

Hi all,    I have GTAW/SMAW PQR, i need use to qualify SMAW plate WPS, think it's possible only for Fillet weld. i'm right ? -- GHRAB Zakaria -- 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 per the scope of API 1104, It is restricted to be used for CS and LAS material.   Which code is to be followed for In-service welding qualification of SS pipe line.     Jaydeep Joshi | Welding Engineer, TDW India Limited Plot No 16 | Phase –III | Alindra – Savli G.I.D.C | Taluka : Savli | Vadodara – 391 775 Board : +91-2667- 619900 | Fax : +91- 2667- 619501 | Extension : 7845 E-Mail : jaydeep.joshi@tdwilliamson.com   | www.tdwilliamson.com Cell: +91 9978959626 P     Before printing, Think about ENVIRONMENTAL responsibility   -- 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/stan...

Dear Mr./Miss./Mrs. The air cooler in HYDROCRACKER unit (oil refining plant)have the below specifications,Please guide me about the welding procedure ,filler metal and any requirements in conform to service. design pressure:55.3 bar/f.v design temperature:171 celsius fluid circulated: H2+HCBN TRACES X-ray examination:spot PWHT:yes (Max. weld hardness;200 brinnel) Materials:SA-516Gr.60 , SA-105 , SA-234WPB Headers Thk.:30 mm. This air cooler is in first steps of construction and only the main drawing is available.the old equipment shall be replaced by the new. Any supplementary date or detail is out of availability. in API 661 some requirements like as low hydrogen content , ... is mentioned, but it is possible the medium/service make the more restriction that is not mentioned or detailed in this standard, Is there any requirement for filler metal or welding process in relation to medium (H2+HCBN TRACES) or service (hydrocracking)? With best regards. GRH 28.02.2011 -- To post to this gr...

Dear Mr.Pradip Goswami,   Thanks for the article, it was informative.   I think the reason behind restricting Nitrogen as a purging gas (ARAMCO standard) when welding austenitic stainless steels is probably due to the fact that it can react with the weld metal and hence reduce the ferrite level to dangeroulsy lower levels. But the gas - metal reactions are much faster/efficient when Nitrogen is included in the shielding gas rather than purging.   I have extensively used forming gas (95% Nitrogen + 5% Hydrogen) to weld grade SS321 with good results, I have noticed this yellowish tint on the weld root, but it has never been a problem. Probably not much of a study has been done about this yellow tint as described in the article.   I think we can expect the same yellow tint to form on the root when we weld alloy 800H which has Titanium in it.   Most of the times we have this stigma to use Argon as purging gas and most cli...

Yes, you can do that untill you are fulfiiling the requirement of the essential variables and supplementary variables (if applicables)for welder. Regards Sandeep Kumar On Feb 27, 1:08 pm, manoj john < manojac...@gmail.com > wrote: > Dear members, > > I have one welder qualified  with one WPS. > > My question is can I employ that welder to weld in accordance with other > WPS,  if the essential variables for welder performance are same. > > Thanks & Regards. > 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.

Hi The main reason is that the mechanical properties are better in the rolling direction compare to transverse direction. But it is not mandatory that you weld in this way. If you weld the material in the way wht u r asking may be possible that you will get lesser strength or other required things as compare to long. side welding. Regards Sandeep On Feb 28, 5:29 am, "Kathalingam Babu" < kathalingam.q...@ppl.com.sg > wrote: > Hi > > It is only optional, not mandatory in many codes. > > Due to the fact that, there is variation in mechanical properties in Trans > direction. > > Thanks & Regards, > > K. Babu > > > > ----- Original Message ----- > From: "Pratik Kshirsagar" < pratiks...@gmail.com > > To: "Materials & Welding" < materials-welding@googlegroups.com > > Sent: Sunday, February 27, 2011 12:08 AM > Subject: [MW:10030] basic funda > > > Dear all, > > ...

Mr. Zakaria,   Attached are some information on Corten Steel/Weathering Steel which would be of help to you. This steel is a micro alloyed, typically added with Copper (major) and other alloying elements, such as Nickel to improve atmospheric corrosion resistance.   ASTM A-588 is one of the specifications which cover such (weathering) steel. See the attached data sheets for  further references.   Corten is quite weldable, with the required precautions to be adopted as per manufacturers guidelines.   AWS SFA 5.5 covers the required specs for welding electrodes,recommended electrodes are E-7018W for Corten A, E-8018W for Corten-B steel.See the atatched data sheet of a popular electrode manufacturer in North America, Air Liquide.   ASME Sec-IX  includes weathering steel, under specification A-588. These steels have S-Nos but do not have any P No .Welding procedure qualification on these ASTM specification specific. PQR  qualifie...

Hi Abhay,   What' re the design requirements??   There're two issues out here,.ASME Code and NACE -Sour service.If you're asking a specific technical query related to PWHT  note and make sure that operating media has a strong influence on determining the applicability of PWHT and mention something about the media also. Plus what's the design code ???, B-31.3 or anything else.     Regarding the PWHT :-the thickness mentioned here, 1 inch sch 80 and  thickness up to  10 inch sch 40 CS SA106 Gr B   would not call for any PWHT. Look up in B-31.3-Table 331.1.1 .The minimum thickness for mandatory PWHT for carbon steels is 20mm (3/4") and above. If there is NACE sour service requirement then PWHT is usually mandatory.However MR-0175 Clause A-2.1.4 provided some waiver from PWHT for some C-Mn steels and allows them to be accepted in as welded condition.  You may find the details in MR-0175 . S...

Hi It is only optional, not mandatory in many codes. Due to the fact that, there is variation in mechanical properties in Trans direction. Thanks & Regards, K. Babu ----- Original Message ----- From: "Pratik Kshirsagar" < pratikshir@gmail.com > To: "Materials & Welding" < materials-welding@googlegroups.com > Sent: Sunday, February 27, 2011 12:08 AM Subject: [MW:10030] basic funda > > Dear all, > I am having a simple question which seems to be stupid but > just it's the basic thing. I want to know why to weld a plate in the > direction of rolling? What happens if the welding is carried out in > transverse direction that of rolling? > > -- > 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/...

Hii there should be static head pressure difference when line is at different levels in terms of heights. For each 10m height , 1 Bar difference is allowabale as per design calculations ... It is normal practice for all pipelines ....when you are doing hydrotest .. Thank you Suresh On 2/27/11, k.ilangkumaran ilangkumaran < k.ilangkumaran@yahoo.com > wrote: > Dear experts, > >                Could you explain me that why there is big difference > pressures between two gauges installed while hydro testing? The first > pressure gauge shows 3barg less than the one installed in 30meters above. > > regards > Ilan > > > > > -- > 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://materia...

Hi….. I am agreeing with Mr.Abdul... A 6 / A 6M for receiving inspection not for after fabrication of the plate... After fabrication your should follow API 650 Adi KSA On Feb 27, 8:19 am, Fitria Rahman < t.chint...@gmail.com > wrote: > Dear Abdul > > A 6/A 6M indicates the requirements and acceptance criteria when you > purchase and receive the material required for project, let say, plate. I > have seen A 6 standard is attached on purchase order document in several > occasion. The QC shall do inspection upon receipt of material. You still > require A 6 on that time.At final inspection, the QC shall issue a > "receiving inspection report" which the inspector has decided fulfill the > requirement of qualification test and certificates, purchase order document, > A 6 standard and whatever you said in PO. > > After issuance of " receiving inspection report', the the material delivered > to fabrication stage. A standard of...