Pressure Rating Tables for Carbon Steel Pipe - Atlas Steels

1 Revised December 2012 Pressure Rating Tables for Carbon Steel PipeNotes to the Tables of allowable working OF LIABILITYThe information contained in this Atlas Steels series of Tables is not an exhaustivestatement of all relevant information. It is a general guide for customers to theproducts and services available from Atlas Steels and no representation is made orwarranty given in relation to this information or the products or processes it Conversion of carbides to graphite may occur after prolonged exposure of Carbon steelpipe to temperatures above 427 Allowable working pressures are given in megapascals (MPa). Conversions to other unitsare:1. This data is intended to provide a general guide.

2 It must not to be relied upon in theabsence of competent professional These allowable internal pipe pressures were calculated by the formula given in "Process Piping", clause Other design codes may give differentallowable pressures. The original specifications must be consulted for full Pipe with Wall Thickness greater than one-sixth of Outside Diameter is not included inthis table ; ASME states that factors other than those included in the standard formulamust be considered for such pipe. For Pressure design of this heavy wall pipe consult Calculations are for Grade B seamless pipe to specifications ASTM A53M, ASTM A106 Mor API 5L. A weld join efficiency factor (typically 85%) must be allowed for standard ERWpipe, and allowance made for corrosion or wear loss if 1 of 4 Atlas Steel GRADE B PIPES - ASTM A53M, A106M, API 5L, SeamlessOutsideWallDiameterThickness -29 to +38204260343371399427(DN) (NPS)(mm)(mm) Allowable Operating Pressure (MPa)ScheduleTemperature( C)Maximum Allowable Stress(MPa)SizeNominal - refer to the associated Notes on page 2 of 4 Atlas December 2012 Carbon Steel GRADE B PIPES - ASTM A53M, A106M, API 5L, SeamlessOutsideWallDiameterThickness -29 to +38204260343371399427(DN) (NPS)(mm)(mm) Allowable Operating Pressure (MPa)ScheduleTemperature( C)Maximum Allowable Stress(MPa)

3 - refer to the associated Notes on page 3 of 4 Atlas December 2012 Carbon Steel GRADE B PIPES - ASTM A53M, A106M, API 5L, SeamlessOutsideWallDiameterThickness -29 to +38204260343371399427(DN) (NPS)(mm)(mm) Allowable Operating Pressure (MPa)ScheduleTemperature( C)Maximum Allowable Stress(MPa)SizeNominal600610 Important - refer to the associated Notes on page 4 of 4 Atlas December 2012