SPECIFICATIONS FOR STEEL PIPE

1 1return to indexPublished pipe standards serve three They dictate manufacturing and testing requirements and prescribed methods of measuring the required mechani-cal and physical Without SPECIFICATIONS , it would be difficult for the pipe buyer to establish a common ground of understanding withthe producer as to product When the pipe producer marks a specification on this product they warrant that the pipe is made from primequality STEEL and meets all the requirements of the pipe is manufactured and tested as prescribed by ASTM (formerly American Society for Testing Materials),an international, non-profit technical and Scientific organization formed for "the consensus development of standardson characteristics and performance of materials, products, systems and services.

2 " The society operates throughmore than 127 main technical committees. These committees function under regulations that ensure balanced repre-sentation among producers, users and general interest groups. The published standards, therefore, represent theconsensus viewpoint of all involved. Line pipe and Oil Country products are manufactured and tested as prescribed bythe American Petroleum Institute (API). The API operates similarly to the ASTM except that producers, consumers,and associations with primary interests in oil or gas are refers to divisions within different types of seamless and ERW pipe and designates mechanical propertiessuch as minimum yield and tensile strengths.

3 Grade B has higher tensile and yield strength than Grade A. It ismanufactured to higher carbon content STEEL . Grade A, being a softer STEEL , is easier to bend and is recommended foruse in close coiling and cold bending. Grade B has higher stress values and is better suited for machining C, which is available in ASTM-106, has higher tensile and yield strength than Grades A & changes have been made to ASTM SPECIFICATIONS over the years. One of the more recent has been to make thespecifications fit with metric, and more correctly, with the measurements of pipe and the related change the pipe outside diameter (OD) and wall thickness, simply multiply the SI dimensions by the appropriatefactor to convert to metric.

4 However, an inch is not a real inch. Nowhere on pipe 12" and smaller is there a correspond-ing measurement because this size has no real numerical solve this problem and still retain the intent of the size designation, the inch mark was removed from the columnshowing the size, and the term NPS was added as were the following words: The dimensionless designator NPS(nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter, size, and nominal size. They are now stated as NPS 1, NPS 2, NPS 6, NPS 12, NPS 14, pipe SPECIFICATIONS are restricted by tolerances for outside diameter, wall thickness, and weight.

5 Pipe must meetall three criteria or material could be rejected. Please refer to the applicable FOR STEEL PIPE2return to indexDIGEST OF COMMON - PIPE SPECIFICATIONSS pecificationand Size RangeWhere IndicatedScopeTypeGradesChemistryA-120 Blk & Galv Welded & SMLSCWNoneNone Specified(has beenpipe for ordinary use - notERWS pecifiedwithdrawn)Intended for close coilingSMLSNPS 1/8 - 16bending or hightemperature serviceA-53 Blk & Galv Welded &CW -CW -NPS 1/8 - 26 SMLS pipe suitable forType FType Fwelding and formingoperations CW notERW -ERW & SMLS intended for EGrade A & BGrade B not intended forclose coiling or severeSMLS -cold forming.

6 PipeType Srequired for close coilingshould be specified for highSMLSG rades A, B & CNPS 1/8 - 26temperature for bending,flanging, and similarforming resistance weldedERWG rades A & BNPS 2-30for conveying fluid, gas or SMLSERWG rades 1, 2, 3 NPS 6 - 24for Pipe PilesSMLSDSAWA-333 SMLS & Welded Carbon &SMLS1, 3, 4, 6, 7, 8, 9 Alloy STEEL pipe for lowERWtemperature serviceA-335 SMLS Alloy STEEL Pipe forSMLSP1, P2, P5, P5b,NPS 1/8 - 26high temperature serviceOnlyP5c, P9, P11, P12,P15, P21, P22, P91A-501 Hot Formed Welded &SMLSNoneSMLS Round, Square &WeldedSpecifiedSquare &Rectangular TubingRectangular1" - 10"Round1" - 24"A-587EW Pipe for process linesERWNoneNPS 1/2" - 10"suitable for severe formingOnlySpecifiedinvolving flanging andclose bendingA-589 SMLS & Welded WaterType 1 Type 1 PipeSMLS or WeldedA or BType 1 Type 1 NPS 6-16 Drive Pipe% maxElementGrade AGrade and check limitsAll grades.

7 05 Max. % & check limitsComposition, max %CMgP SType S (seamless pipe)Open-health, electric-furnaceor basic-oxygen:Grade .095 E (electric resistance welded)Open-health, electric-furnaceor basic-oxygen:Grade .095 F (furnace welded pipe)Open-health, electric-furnaceor basic- and Check LimitsComposition, max %Element*Grade AGrade BGrade *These five elements combined shall not exceed 1%.% maxGR CM - - . - . - - 2 - . - .98 .44 - .40 - . - . - - . - - .32 - .40 - . - .75.

8 Max..15 0 - .50 New designation established in accordance with Practice E-527 andSAE J1086. Practice for Numbering Metals and Alloys (UNS).b. Grade P5c shall have a titanium content of not less than 4 times thecarbon content and not more than or a columbium content of8 to 10 times the carbon %ElementHeat AnalysisProduct AnalysisCarbon, , , , min.* *When copper STEEL is specified% P S to indexTensilesHydrostaticTests BendFlatteningWall ToleranceOD Tolerance None SpecifiedyesNone SpecifiedNoneMin. wall shall not1/2" - 1-1/2" + 1/64"Specifiedbe more than "under nominal wall2" & over-+/- 1% of ODyesyes - 2" & underyes -Min.

9 Wall shall not1/2" - 1-1/2" + 1/64"Std. & XHY 90 over 2" more than "to 12 times nom. XHY & nominal wall2" & over-diameter. CloseCW 90 +/- 1% of ODcoiling 180 to 8to 75% ODvtimes nom. " - 1-1/2" + 1/64"-1/32"2" - 4" +/- 1/32"yesNot req'd over 2" yes -Min. wall shall not5" - 8" + 1/16"diameter. 90 toover 2" more than "12 times nominal wall10" - 18" + 3/32"Close coiling-1/32"180 to 818" & over-times diameter 1/8"-1/32"yesNone Specifiedyes -Min. wall shall notFor all sizesfor all sizesbe more than +/- 1% of ODto 2/3 ODunder nominal wallNone SpecifiedNone SpecifiedNoneMin. wall shall notSpecifiedbe more than +/- 1% of ODunder nominal defects nomore than 25% deep2" - 4" +/- 1/32"5" - 8" + 1/16"yesNone Specifiedyes -Min.

10 Wall shall not- 1/32"for all sizesbe more than " - 18" + 3/32"under nominal wall- 1/32"18" & + 1/8"Over - 1/32"1/8" - 1-1/2" + 1/64"-1/32"yesyesyesMin. wall shall not2" - 4" +/- 1/32"be more than " - 8" + 1/16"under nominal wall- 1/32"10" - 18" + 3/32"- 1/32"20" - 26" + 1/8"-1/32"Round:1-1/2" & under + 1/65"None SpecifiedRound NoneNoneNone Specified- 1/32"SpecifiedWeight shall not be2" & over +/- 1% of ODShapes Yesless than specifiedShapes:by more than " & under +/- .020 Surface defect2-1/2" - 3-1/2" +/- .025no more than 15%3-1/2" - 5-1/2" +/- .0305-1/2" & over +/- 1%None SpecifiedNone Specifiedyes -Refer to table 4 Refer to table 4 ASTMN ondestructiveA flange testfor all sizesASTM StandardsStandards for A-587testshall be madefor A-587shall be made1-1/2" & underyesNone SpecifiedNoneMin.