Re: [MW:8024] RT of longitudinal seam

As ASME B31.3 mentioned:

Piping in Normal Fluid Service shall be examined to the extent specified herein or to any greater extent specified in the engineering design

When a circumferential weld with an intersecting longitudinal weld(s) is examined, at least the adjacent 38 mm (11⁄2 in.) of each intersecting weld shall be examined. (Para. 341.4.1. (b).1.)

In your case there are two longitudinal seam welds intersecting circumferential weld from both sides in the same line so to cover this area the girth weld and longitudinal weld shall be radiograghed separately so that all intersection area shall be clearly tested in addition PT and Hardness test shall be carried out to ensure that there is no surface defect or loss in ductility.

Kind Regards

Mahmoud Abdul Fattah

Sr. Inspector to Germanischer Lloyd

Mobile:+971 506 827 001

Email: aeme@gl-group.com

www.gl-nobledenton.com

From: sujay kumar <sujay1199@gmail.com>
To: materials-welding@googlegroups.com
Sent: Wed, November 3, 2010 7:48:39 AM
Subject: Re: [MW:8022] RT of longitudinal seam

Hi,

this is applicable for longitudinal seam pipe and circuferential girth generally what we doing.

what about when both side longitudinal seam are intersecting without maitain mim distance, at that RT is applicable to take 38mm both side or we have to maintain that nominal distance at any cost.

attached B31.3 341

also

thanks and regards

Sujay

On Tue, Nov 2, 2010 at 5:51 PM, AGUSTIN JIMENEZ <agumarca@yahoo.com> wrote:

HI.

IF YOU USED 70 MM FILM AND PUT SEAM IN CENTER FILM, YOU HAVE APROXIMITLY MORE O LESS 38 MM OF INTERSECTION.

AGUSTIN

De: sujay kumar <sujay1199@gmail.com>
Para: materials-welding@googlegroups.com
Enviado: mar, noviembre 2, 2010 4:06:45 AM
Asunto: [MW:8012] RT of longitudinal seam

Dear Friends,

Having doubt ,when longitudinal seam an intersecting with circuferential seam,Taking RT of circumferential full girth 100%, is acceptable or have to take 38mm of longitudinal seam an intersecting point and reference is B31.3 cl341.4.1

The welds to be examined shall be selected to

ensure that the work product of each welder or welding

operator doing the productionwelding is included. They

shall also be selected to maximize coverage of intersections

with longitudinal joints. When a circumferential

weld with an intersecting longitudinal weld(s) is examined,

at least the adjacent 38 mm (1
1⁄2 in.) of each intersecting
weld shall be examined.

thanks and regards

Sujay

--
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-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-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.

Re: [MW:34105] SA266 GR4N 4 Cycle SPWHT

Hi, You are correct, Minimum refers to the one cycle for which this part will expose until final work shop PWHT. hence mill test certificate shall include this. Max. SPWHT, refers to additional cycles of heat treatment that are reserved for future repairs during equipment lifetime. Again, these simulated no. Of cycles shall be specified in MTC. The idea is we need to make sure that steel mechanical properties are not compromised upon exposure to multiple repairs (i e 4 cycles in your case). One could say, if steel is subjected to 4 cycles and is ok, then it should by defacto be good for one cycle, yet, this is wrong assumption cause mechanical problems and microstructure of materials varies accordingly based on no. Of cycles for which material will expose. This is apparent in alloy steel and especially for impact test values as an example. In your case, this forged CS with properties before PWHT can be understood to be " as forged" condition (i.e. Wit...

Materails FAQs

Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change. Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...

Materials & Welding

Search This Blog