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LittleInch, Thanks for your comments. You’re exactly right. I don’t understand why a jet fuel pipeline needs to be lined where there are filtration after storage tank to filter the fuel. On the other hand, jet fuel is not corrosive to necessitate the need for internal lining (although internal...

Thanks, that was helpful.

The manufacturer is partially correct. Transverse specimens cannot be taken from 1" to 3" pipes due to their small size. In this case longitudinal specimens can be taken, however it is recommended minimum required CVN to be increased to 40J. Have a look at ASTM A370 to understand dimensions of...

Hello, I am designing a jet fuel pipeline which runs from an offshore unloading point to an airport. I understand maintaining quality of jet fuel is essential and some people recommend internal lining to be used on pipelines, but I have not been able to find any standards, guidelines or...

Is there a maximum slope on which gas pipelines can be installed? Is there any limitations? any ideas?

Tpolleri, You need to use the difference between the the pipe temperature at the time of installation (normally 10 or 15 deg.C) and the warmest or coldest pipe operating temperature. The idea is to calculate the maximum thermal expansion/contraction of the pipe after installation. Hence, dT=...

Thanks BigInch. That was very helpful.

API 1102 does not specify a value for coefficient of thermal expansion. It specifies a typical range of 1.6x10-5 to 1.9x10-5 (refer to Table A-2). Clause 832.2 of ASME B31.8 states that “The thermal expansion and contraction of the more common carbon and low alloy steels may be calculated...

Thanks Saplanti, but AS 2566.1 is for flexible pipes and it does not specify how to calculate cyclic circumferential stress and cyclic longitudinal stress due to vehicular loads. Also there is no requirement to do a Girth Weld Fatigue Check and Longitudinal Weld Fatigue Checks in AS 2566.1. Also...

Ok,How can I demonstrate that 750mm is not safe? by doing some calculation?

BigInch, 3feet is the minimum cover if you design to B31.8. Australian Standards allow 750mm depth of cover. If infrequent crossing of heavy machinery, farming machinery, etc. does not cause any problem for the pipeline there is no reason to have 900mm DoC.

I need to determine the acceptability of external transverse loads exerted on pipeline as a result of construction and farming machinery crossing the pipeline at locations other than designated roads. The calculation can be carried out for 900mm, 1200mm and 1500mm depth of covers as per...

Hi all, I am working in a consulting engineers company in the field of oil and gas. Now adays we are designing an oil and gasoil pumping station. I believe that inside and also outside liquid hydrocarbon pumping stations, ASME B31.4 is applicable for piping and pipeline (both), but the owner...