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Hi This is PV K Raju I would like to know the industrial painting defects and its remade Recently we have found coating defect and the details as under after coating we have found coating defect ie. surface small bubbles and we suspecting in air quality is it due to air or any other causes...

Hi Thanks for your response As you said S355 or equivalent means Use S355 or better We are planing to use S355 equivalent material like 1) S355K2G3 2)S355J2+N 3) S355K2+N etc The above grade materials are equivalent? Please give your comment Thanks & Regards PVK Raju

Hi This is PVK Raju and iam presently working in engineering industry and subcontract of navel and ship building. one of our customer requirement as per drawing raw material is S355 or equivalent material How do find the S355 (structural steel-EN 10025)equivalent materials. Can anybody have in...

Hi Thanks everyone for your response. Inner diameters can be measure the inside micrometer or bore gauge Secondly can be measure the Ultrasonic testing with difference wall thickness Well once again thanks for help Still I am not clear how to measure the inside bore different step width like...

Hi This is PVK Raju In our organization after completion of manufacturing part during inspection we have found some difficulties example Outer dia 68mm length 152mm with 100mm step dia on that inner dia having 33mm and 35mm 45mm diameters with different lengths We can measure Outer dia and...

Hi Thanks for immediate response Threading M5x0.8 pitch for that we have found after drilling hole dia 4.2mm only, And also we suspect that if larger dia hole could be thread may be play. Shell we do increase the hole size up to 4.5mm? Please suggest Thanks & Regards, P V Krishnam Raju

Hi Recently We have tapping problem in manufacturing component and the details as under one of the component steel material having M30 Nut for that locking screw M5 threading for that we have done drilling 4mm drill then we have done tapping M5 tapping by hand for that we have observed NO GO...

Hi Every one thanks for your immediate response Yes,it is Inside groove and it is O ring groove only. But as per customer requirement we have done machining operation but we are unable to measure the surface finish Thanks for your valuable advise. Other then profile meter is their any easy...

Hi This is PVK Raju I would like to know how to measure surface finish on inside groove machined part Example: We have one of the machined part (component) like inside groove width 3mm only (as per drg. surface finish is 0.8Ra)for that we have to measure surface finish and Surface finish...