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Chemical Requirements
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Grade A
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Grade B
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Grade C
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Total of Cr, Cu, Mo, Ni, and V shall not exceed 1%
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Carbon max. %
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0.25
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0.30
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0.35
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Manganese %
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0.27 to 0.93
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0.29 to 1.06
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0.29 to 1.06
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Phosphorous, max. %
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0.035
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0.035
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0.035
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Sulfur, max. %
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0.035
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0.035
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0.035
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Silicon, min.%
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0.10
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0.10
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0.10
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Chrome, max. %
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0.40
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0.40
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0.40
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Copper, max. %
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0.40
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0.40
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0.40
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Molybdenum, max. %
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0.15
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0.15
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0.15
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Nickel, max. %
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0.40
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0.40
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0.40
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Vanadium, min.%
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0.08
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0.08
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0.08
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Permissible Variations in Wall Thickness
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The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.
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Permissible Variations in
Weights per Foot
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Weight of any length shall not vary more than 10% over and 3.5% under that specified.
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NOTE -- NPS 4 and smaller -- weighed in lots. Larger sizes shall be weighed separately by length.
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Tensile Requirements
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Seamless
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Grade A
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Grade B
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Grade C
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Tensile Strength, min., psi
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48,000
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60,000
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70,000
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Yield Strength, min., psi
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30,000
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35,000
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40,000
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Tensile Requirements
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Seamless
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Grade A
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Grade B
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Grade C
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Tensile Strength, min., psi
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48,000
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60,000
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70,000
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Yield Strength, min., psi
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30,000
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35,000
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40,000
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Number of
Tests Required
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NPS
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On One Length from Each Lot of
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Tensile
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5 and smaller
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400 or less
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6 and larger
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200 or less
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Bending
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2 and smaller
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400 or less
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Flattening
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2 through 5
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400 or less
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6 and over
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200 or less
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Hydrostatic
Testing
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Inspection test pressures produce a stress in the pipe wall equal to 60% of specified minimum yield strength (SMYS) at room temperature. Maximum Pressures are not to exceed 2500 psi for NPS3 and under 2800 psi for the larger sizes. Pressure is maintained for not less than 5 seconds.
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Mechanical Tests Specified
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Tensile Test -- NPS 8 and larger -- either transverse or longitudinal acceptable
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Smaller than NPS 8 -- weighed in lots. Larger sizes -- by length.
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Flattening Test -- NPS 2-1/2 and larger.
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Bending Test (Cold) -- NPS 2 and under.
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Degree of Bend
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Diameter of Mandrel
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For Normal A106 Uses
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90
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12 x nom dia. of pipe
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For Close Coiling
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180
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8 x nom dia. of pipe
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Lengths
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Lengths required shall be specified on order. No "jointers" permitted unless otherwise specified.
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If no definite lengths required, following practice applies:
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Single Random -- 17' ~ 24' lengths
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Double Random -- 36' ~ 44' lengths
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Required Markings on Each Length
(On Tags attached to each Bundle in case of Bundled Pipe)
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Rolled, Stamped, or Stenciled (Mfrs. Option)
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Manufacturer's name or brand.
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Length of pipe.
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A106 A, A 106 B, A 106 C.
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ANSI schedule number.
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Hydrostatic test pressures and/or NDE;
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Weight per foot (NPS 4 and larger)
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or NH if neither is specified.
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Additional "S" if tested supplementary requirements.
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libre ENCED DOCUMETNS
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ASTM A 530/A 530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe
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ASTM E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing
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ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation
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ASTM E 381 Method of Macroetch testing Steel Bars, Billets, Blooms, and Forgings
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ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products
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B26.10M ASME soudé et Sans soudure tube d’acier forgé informations générales afin que le matériel conformément à ces spécifications devraient être les suivants, selon les besoins, pour décrire le matériel désiré adéquatement : quantité : pieds, centimètres ou nombre de longueurs nom du matériau : tuyau sans soudure ou soudés Grade : Grade A. classe B ou classe C fabrication : chaud fini ou froid dessiné Dimensions : NPS ou diamètre extérieur et numéro d’épaisseur de paroi moyenne tolérance du diamètre intérieur diamètre extérieur spécial tolérance tuyau tuyau plus 10 ID longueur : spécifique ou aléatoire supplémentaire requise Test rapport spécification désignation test hydrostatique exigences spéciales Groupes de Produits : Pipe sans couture > ASTM A106/A106M, ASTM A53/A53M
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