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HI Recently I have encountered a problem in which my carbon steel component is heavily corroded. The component is made up of rolled plates which we recently purchased. I have done XRD analysis of the scale to see if high corrosion rate is due to rolled in scale present on the plates as heavy...

Hi Guys, I am appearing in API RP 571 certification exam. Need your guidance how I should prepare for an examination and what kind of questions do I expect. Thanks in advance.

Hi Guyz, Kindly help in analyzing the microstructure in the HAZ region of the welded plate (ASME SA516 Grade 70 Plates after welding are Post weld heat treated. Just wanted to confirm if there is any harmful microstructure in the HAZ region which is making the impact values very less. The...

Hi I have 1 metallurgical sample of API 5L grade X65MS pipe. I have done micro structure analysis and found microstructure to be granular bainite. Let me know with your experience if my interpretation is right. Also there is an HIC crack and in that crack i found inclusions marked by red...

Hi can anyone explain what does MS stands for in API 5L grade X65 MS Pipes? thanks

Hi i have 2 samples from different Api 5l X65 pipes which failed NACE hic test. I am looking for a root cause analysis. Based on your experiences can you please guide me what to check specifically in microstructure analysis? Inclusion content in unetched conditions will be useful? Any other...

Hi One of our drive shaft is failed during service at the area where splines are located. the material is nickel alloy. The fracture surface is oriented at 45 degrees. the chemical and mechanical properties are perfect. some ratchet marks were also observed at spline root while at one location...

hi Did anyone encountered cracking in Bend sample of SAW API 5L grade X70 pipes?

hi i am interested to get some useful information of failures related to drilling equipment. Please guide me from where i can get some case studies or literature? I shall be thanful

Hi Is it possible to perform ASTM A262 Practice E on dissimilar metals(SS304L Butt welded to Carbon steel). What do you guys think about it. Personally i do not think so it is feasible to perform this test on dissimilar metals joined by welding.

Hi our client has requested us to perform peel test on a brazed lap joint. i have never done it before so i have performed 1 test in which i have bend 1 section of the plate. During bending the plate broke at the brazed joint. Now the requirement of ASME IX is to check for discontinuity on the...

Any idea what pickling agent we should use for inconel 625 weld overlays?

Hi guys, I have a confusion with the timing of the electrolytic etching on Austenitic Stainless steels welds. On parent Austenitic steels 1 min is mentioned in ASTM A262 for 1cm2 area if the sample and it gives us good etching results but when we give 1 min time for etching to welded samples...

Dear All, I have encountered an issue during production, one of the pipes rupture after hydrotest beside the longitudinal seam Pipes were made of API 5L Grade X70 and contains longitudinal seam weld. It seems that ruptured occurred from an area beside the weld you can also say at HAZ from the...

HI all I have some questions regarding the micro structure of 4140 steel. It is widely used in the drilling equipment. Is it possible that prioir austenite grain boundaries can be present in quenched tempered conditions or is it possible to reveal the prior austenite grain boundries using 2%...

Dear All I am facing some issues related to the corrosion of dermacoat coated carbon steels bolts with grade astm a490m. These bolts are installed in an ammonia plant with 1 year in service. At the same time i have some bolts which are coated with hot dip galvanized coating the grade of the...

HI I have one question for you guys . I am reviewing the tensile test reports for the plate of SA516 Grade 70. 2 samples have been extracted from the same plate but the values of UTS are different while yeild strength remasn same. I am getting 474 Mpa and 487 Mpa as UTS in the 2 samples...

Hi I have 1 question for you guys. We have encountered pitting corrosion in the pontoon pipes(Al 3004) of a internal floating roof of the carbon steel tank. The steel tank was hydro tested and half of the pontoon pipes are corroded. Initial thoughts are that it occurred due to the galvanic...

Hi guyz i have one questions for you. if any one has any idea about the presence of SiO2 globular oxides in ferritic stainless steels and how it affect corrosion resistance and what its effect on the micro structure. Your help would be appreciated in this regards.