Studs, Bolts, Flanges and More

Mr.Faisal please varify as to the complete name & location & type of plant (Cement/oil/Sugar etc.)you are employed with.

Your questions coming in seems that you have recently joined and want to get all answers from people around the world to make an impression to your immediate Boss or your Seniors are just willing to teach you.

Or these are part of your course? or thesis?

Continuation -

I also see you have Forum Threads "Short Answer Plz" & "Oil Storage Tank".

Faisal - What are you? Did you shoot your head off prior your appointment that you now find yourself in a place where you need all the quick answers?????

On Oil Stroage tanks i referred Mr.Abdel Halim Galala who gave you aqn excellent description. Please first learn to thank him for this!

Continuation again - I see you are in a Thread "Pipeline" too!

Faisal,

If you are an engineer with a degree in the subject, you should know the answers to most of these questions.

If not, a good place to start is to invest in a copy of Machinery's Handbook or any good text book on the subject. Most engineers I know invest in a copy sooner or later.

Have you read ANY of the documentation supplied to you by your client? Do you know what a specification is? If so, you should have one for the equipment you are building - READ IT AND THE CODES, STANDARDS AND SPECIFICATIONS TO WHICH IT MAKES REFERENCE. Then make sure you understand them. Go and talk to your supervisor about what you don't understand. If he's competent, he should be pleased to train you or agree a course of action to clarify matters, which often means going back to the client and asking for clarification.

If you're scared to ask - GET OVER IT - until you do, you are potentially dangerous to the public at large.

I have suggested before that some of those who post to this website should familiarise themselves with using Google or another Internet search engine - you would find the answers to some of your questions there.

Whilst I would always encourage engineers to ask questions when in doubt, remember that the first person you should be asking is your immediate supervisor. Did you ask him? IF YOU DIDN'T, WHY NOT? We'd all be interested to know the answer.

Owen.

Faisal Siddiqui,

The 'M' in M25 for example simply means that it is a metric bolt you are working with. i.e. M25 means you have a bolt with a 25mm diameter.

There should be some other markings on the head of the bolt. This is just the material of the bolt.

When you say 'Class 150' you are generally talking about the maximum working pressure of the pipe in PSi I believe.

This is an ANSI pipe you are using - they normally come in classification sizes 150, 300, 400, 600, 900, 1500 and 2500. This is an IMPERIAL size pipe - i.e. everything measured in inches so I am a bit confused as to why you are using metric bolts.

For example, and ANSI Class 150 pipe with pipe size 14" (the OD of the pipe) uses 12 of 1" bolts. 1" being equal to 25.4mm. Where these seem to be the same in dimensions, they will vary slightly from each other which may affect your bolt stress and torque levels.

I cant answer your questions regarding sandblasting unfortunately but I can probably answer any other questions you have regarding the pipe/flange/gasket/bolts etc. I will subsribe to this topic to be alerted of any future posts.

Hope this information has helped you.

You mentioned MTC of a material - can you explain what this is as I may be able to help you with it.

Kind Regards

Kev Brown

Hello, I give you a GA for your reply being that you tried to help and answer his questions and didn't merely tell him he should not ask or should have already known the answers. Also I think he means Material Test Certificate by saying MTC. I would have called it MTR for Material Test Report but It could be different where he is from?

pipewelder