Where can you find  drill pipe and drill collar capacity and displacements in bbl/ft on the internet?
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Try this site:\n\nhttp://www.grantprideco.com/drilling/catalog/drilling_Catalogs.asp
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try the company web site for the equipment
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http://earthquake.usgs.gov/eqcenter/recenteqsww/
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the quickest way to figure it out i think would be to call a fitting/valve supply house and ask them. the BSI standard you reference deals with manufacturing. i have found some ISO sets that govern this and some API but im not in India and have yet to build anything in that country so i doubt these will help. unless India uses American Petroleum Industry standards.
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Whole bunch of links here\nhttp://www.lumber.org/links/
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try this website:\nhttp://www.bmezine.com/pierce/02-tongue/bme-pg02-exp-stud-001.html
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does this help?\nhttp://www.bballgoals.com/bbgcourtdimensions.html
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http://www.bbandt.com/
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http://www.eng-tips.com/index.cfm
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http://www.bodine-assembly.com/
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http://www.machinevibration.com
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www.britishblades.com/forums/showthread.php?t=3453 \nhere it is
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http://qualitybase.org/default.aspx
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If you desire the external surface area of the pipe,\n\nA = pi*d*L\n\nMake sure d & L are in the same units and your answer will be in those units squared.\n\nIf you are looking for the internal cross sectional area:\n\nAc = (pi*d^2)/4
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http://www.ecrush.com/
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Try the link below there are some information on wall thickness etc to DIN:-\n\nhttp://www.alzarfze.com/pages/pipemain.htm
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Tigerdirect.com\n\nhttp://www.tigerdirect.com/applications/category/category_tlc.asp?CatId=1946