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Hi folks, Here's a good one for you. We are trying to size a pump in order to perform a hydraulic test in a pipeline system. We have the following data : 1) Pipe size - 18 " (SA 106 Gr.b) 2) Straight Pipe length - 5.000 mt 3) Hydraulic test pressure - 41,25 Barg 4) Fluid - Potable Water 5)...

Hi folks You noted once that I shouldn't use API 5L piping for an ASME VIII div.1 vessel. Even though I dont seem to understand why, since you can use an A 106 Gr.B PIPE!, now I'm in the position of no turning back where I've used an API 5L X 65 pipe to lower the calculated thickness of the...

Hi everybody, This is my first thread in this mechanical engineering division so my question is simple.Often we are asked to size shell-u tube heat exchangers and as far I know the most critical parameter is defining the overall heat transfer coefficient. Different approaches-values, result to...

Here's a good one for you folks. Is it permissible to weld a SA 234 Gr. WPB cap to a API 5L X 65 pipe? Our quality manager stated that if the calculated wall thickness is acceptable, they can be welded using of course a new WPS for this weld. Is this clause valid or I have to proceed with a gr...

Hi everybody, First of all I would like to thank each and everyone of you for your concern on my queries. You quys are the best and this forum rules. I'm quite new in the area of API 650 tank design and engineering, so I would appreciate some guidelines and technical directions on the above...

Could somebody recommend a reliable piping thermal insulation thickness calculator? (Freeware or an excel will be highly appreciated!) Regards George

Hi lifesaviours, I would like you to advise me on the applicable rise rate (velocity) of an internal Floating roof when filling a tank. A certain manufacturer replied as follows : " There is no standard as such for the rise rate of a Internal Floating Roof when filling a tank. All we make sure...

Hi guys, Could someone advise me on the gap that needs to be left between flanges for gasket utilization? I'm having a hard time to find a reliable source where I can obtain this info. Any suggestion? For example is 3mm (compressed) adequate clearance for a spiral wound gasket for a #600 flange...

Hi folks, Here's a quicky for you pressure vessel guys!!!. Is there any reference in the ASME VIII div.1 that states that the use of o-lets as nozzles does not require any reinforcement calculation. For example in a high pressure vessel with a design pressure of 70 Barg shell OD 24" there is a...

Hi everybody, 1)Where can I obtain the SA 515 Gr. 60, DIN equivalent? Generally as an outcome of your experience and research, which is the best and trustworthy source for ASME to DIN and EN material equivalents? 2) Could somebody assist on how semi-elliptical and torispherical geometries are...

Sorry for my ignorance folks,but is a 4" kicker line of a 22"x18" scraper trap of 1400 c.m/hr flow rate adequate? Is there a good engineering practice for sizing kicker line for scraper traps(launching/recieving)? Thanks in advance.

It's me again. Please advise me on the intelligent pipeline pig overall dimensions. I've searched nearly every manufacturer and I cannot find a reliable source. Please direct me to it. Thanks in advance.

Hi everybody, Is it permissible to weld an elbow to an elbow without the use of a pup (spool) piece during an ASME B 31.4 pipeline design.? A client commented " Elbow 90 degree cut through 45 should have min. 0,5 m pup piece prewelded on to bend at workshop/ factory." Is the clause valid.? A...

Hi everybody, I have the following three questions for you : 1)Do we always have to take 12,5% wall undertolerance into account while performing ASME VIII,ASME 31.4, 31,8,31,3 wall thickness calculation. Where do the above mentioned codes clearly diclare the necessity of it?(specific paragraph...

Hi everybody, Is there any reliable source where I can retrieve some valuable geometrical information on 1)SMALL KNUCKLE RADIUS DISHED STEEL HEADS (Thickness up to 50 mm), 2)TORISPHERICAL STEEL HEADS (Thickness up to 50 mm), 3)ELLIPTICAL 2:1 STEEL HEADS.? Thanks in advance.

Hi everybody. Two additional queries for you. 1)Do I have to perform a reinforcing area calculation for a 2" nozzle in a ASME VIII div.1 calculation? Is the minimum nozzle thickness according to UG-45 the only limitation for a nozzle EQUAL or smaller than NPS 2" for an ASME VIII calculation...

Dear friend, My query may seem quite inane but I would like you to advise me on how to assure that a pipeline operates always in a "positive" pressure at the highest elevation point and the liquid colume doesn't split even if pumps provide sufficient head. For example I'm trying to pump an...

Hi everybody, Here's a good one for you. We are trying to estimate the bending radious of an API 5L X 56 pipe in order to achieve the what is called " Natural Bend". This piping terminology is not familiar to me that is why I'm in search of a mature answer from an experienced piping expert...

Hi again There is a good one for you:) Where could i obtain a trustworthy source that will guide me to the best estimation of the ASME VIII div.1 allowable stress values concerning API pipes used for pressure vessel construction. I know that these pipes are not included in the ASME II part D...

Hi to all, I'm currently working on this project where the following question arised: I am performing a wall thickness calculation according to B31.3 ASME code. I have to choose between an A106 Gr.B and an API 5L X65 pipe for a 20'' pipeline. Regarding the allowable stress issue it seems that...