During welding of cs pipelines (API 5L X 52-65 grades) especially the residual magnetism is the pipes (due to say induction heating during the coating) could cause problems during welding. Now traditionally, the equipment for demagnetising are AC equipment. I was told however that the welding...
Need advice on selection of material for the following 2" piggy back pileine carrying corrosion inhibitor as per details below:
Chemical Composition:
Aromatic Naptha: 50 – 70% (w/w)
Composition Comments: A proprietary blend of amine derivatives and fatty acids in an aromatic solvent.
Physical...
1. PWHT is not a requirement for the clad/overlay itself. Hence for a clad component (with any cs thickness, for e.g. even 200 mm wall thickness and typical 3mm clad), with the part not going to be butt welded to any other part (for ease of understanding, say for e.g. a blind flange), there...
1. PWHT is not a requirement for the clad/overlay itself. Hence for a clad component (with any cs thickness, for e.g. even 200 mm wall thickness and typical 3mm clad), with the part not going to be butt welded to any other part (for ease of understanding, say for e.g. a blind flange), there...
1. PWHT is not a requirement for the clad/overlay itself. Hence for a clad component (with any cs thickness, for e.g. even 200 mm wall thickness and typical 3mm clad), with the part not going to be butt welded to any other part (for ease of understanding, say for e.g. a blind flange), there...
This is just a brainstorming for possible reasons for low values on A 694 F60 forging @ -40 Degrees C.
1. Testing variance and improper root radius for notch.
2. Temperature, holding time and methodology for Quenching & Tempering.
3. Chemistry ???
4. The freedom of cross section of impact...
I am currently in process of getting UK based registrations where I am being offered Incorporated Engineer in place of Chartered Engineer because I do not have a 4 year MEng degree. Now my question is first on the registration itself where it seems that IEng is more of a QC related while CEng is...
Imagine I have a HT cable running from a power station to a distribution station. The moment I have a potential difference in the form of some volts, In this case it should be very high voltage and low current, the free electrons start flowing from the negative to the positive terminal. What...
1. Any idea on why this material is used for piles, i.e. A252 Grade 2. from what I can see of the amterial it says low carbon steel but from the specs P0.05 and rest Fe. I am confused on whether this is nearly pure Iron or steel.
2. In some technical write up I saw, since this material is not...
"We would suggest the following tentative ranking, which intuitively seems correct, as it puts materials with fully austenitic (fcc) microstructure ahead of those with partially or fully ferritic/martensitic (bcc) structure, in terms of resistance to cracking in H2S media: Incoloy 825> 316...
How useful are these certifications by ASQ? Especially since my core competency is welding and I am working on getting a MSc(welding) from Cranfield(eventually going to get EWE/IWE), MWeldI & CEng from TWI. I have got Sr Welding Inspector from CSWIP, and aiming to get CWI/SCWI from AWS.
I would...
We are currently working with some client specs which requires PWHT for all thicknesses of cs for HIC/SSCC requirements. Now the only exempt welds are socket welds of 2" dia or lower.
1. Is this requirement ok based on your experience?
2. If I want to avoid PWHt for lower thicknesses, say...
I have come across quite a number of specifications which specify a lower impact temperature for the materials as the thickness increases. For eg for an offshore comp-lex using S355 grade of material upto 45mm, the testing of the material and welds is required @-20 Deg C (The complex is...
Does anyone have data on Tensile strength of duplex weld metal at 120 Degrees C?
Thks in advance
Thanks and regards
Sayee Prasad R
Ph: 0097143968906
Mob: 00971507682668
email: sayee_prasad@yahoo.com
The whole of science is nothing more than a refinement of everyday thinking!!! [thumbsup]
Let us take an example of a process for ease of understanding say a software program for certification of QC activities. What should one interpret as the validation requirements v/s the verification requirements of the software? From my ISO 9001-1994 experience, with a "U" stamp as...
1. How and why is Ca added(if at all added purposely) to line pipe steels?
2. DnV 2000 restricts the Ca content to 0.6%. Does increasing the Ca content affect weldability? If so how does it affect weldability?
3. Does increasing Ca in line pipe steels affect welding(especially automatic...
I need data on velocities of sound in DSS(S31803) and SDSS(S32750) for calculations related to Ultrasonic testing. Does anyone have refernces/data on the same???
Thanks and regards
Sayee Prasad R
Ph: 0097143968906
Mob: 00971507682668
email: sayee_prasad@yahoo.com
The whole of science is nothing...
The theories of Cr oxides giving the stainless steel is ok. Is the corrosion resistance of inconels also due to the same reasons? Do these alloys also have a thin Cr oxide layer giving the corrosion resistance? And if that is the case why do we not see any sensitization problems with Inconel...
The subject materials(SA193 B7bolts, B148C95800 Al Bronze casting) intended for valve for seawater service. The galvanised nuts are not coming into contact with the seawater(They are on the side of the casting not in contact with sea water). In that case is any insulation required between the Al...
