Re: [MW:10029] Tank Peaking/Banding Issue, API 650

Respected Wahab,   When you are applying for whole tank height then the criteria will be API 650 i.e., 1/200. Where as if you are going to check plumbness for individual shells the ASTM applicable relevent specification has to be refered. Your interpretation is correct and the tolerence for each individual shell plate based on thickness, height and length will be as per your derived value.   Ishfaq Jubail, KSA From: Abdul Wahab <awengineer@gmail.com> Subject: Re: [MW:10024] Tank Peaking/Banding Issue, API 650 To: materials-welding@googlegroups.com Date: Saturday, February 26, 2011, 6:12 PM Dear Sir,   Thank you very much for replying, but problem is that API 650 by itself refering to mentioned standard like ASTM A 6M etc.   Please advice,   Abdul Wahab On Sat, Feb 26, 2011 at 3:24 PM, Suresh <bobsuresh24@gmail.com> wrote: Hii Abdul , You should follow API 650 for tank consrtuction , not ASME code . In my best of my knowledge , you need to refer to API 650 and follow tolarances which was mentioned in API 650 . Thank you Suresh On 2/26/11, Abdul Wahab <awengineer@gmail.com> wrote: > Dear All, > > I am Abdul Wahab working in KSA as QA/QC Inspector, I have an issue > which is confusioning me. Below there is copy of Paragraph of API 650. > Plumbness, peaking, banding & flat spot discussed in this & tolerances > are provided but along with tolerance of API 650, also refering to > ASTM standards, those standards have tolerances aproximately a double > values as compared to API 650 Tolerances. Do we need to follow those > as ASTM is not a tank construction code but provide guidance about > matrial manufacturing,testing & handling etc. > > We have Banding Value for 6 mm Plate of 13 mm max,  can we consider a > dent as a banding problem in tank shell. > > Please see below & advice. > > 7.5.2 Plumbness > > a. The maximum out-of-plumbness of the top of the shell relative to > the bottom of the shell shall not exceed 1/200 of the total > tank height. The out-of-plumbness in one shell course shall not exceed > the permissible variations for flatness and waviness as > specified in ASTM A 6M/A 6, ASTM A 20M/A 20, or ASTM A 480M/A 480, > whichever is applicable. > > > > 7.5.4 Local Deviations > > c. Flat spots measured in the vertical plane shall not exceed the > appropriate plate flatness and waviness requirements given in > 7.5.2. > > If there is any confusion to understand, please ask. > > > Abdul Wahab > Mechanical Inspector > KSA > > -- > To post to this group, send email to materials-welding@googlegroups.com > To unsubscribe from this group, send email to > materials-welding+unsubscribe@googlegroups.com > For more options, visit this group's bolg at > http://materials-welding.blogspot.com/ > The views expressed/exchnaged in this group are members personel views and > meant for educational purposes only, Users must take their own decisions > w.r.t. applicable code/standard/contract documents. > -- Thanks  & Best Regards, Suresh Mobile No: 91-92 92 905 905 -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents. -- To post to this group, send email to materials-welding@googlegroups.com To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com For more options, visit this group's bolg at http://materials-welding.blogspot.com/ The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.