9.3Flattening Test—A section offinished tubing,not less than3in.(75mm)in length shall not crack or exhibitflaws whenflattened between parallel plates to a distance equal to three times the tubing nominal wall thickness.Superficial ruptures resulting from minor surface imperfections shall not be considered cause for rejection.
10.Permissible Variations in Dimensions
10.1Permissible variations in the outside diameter of the tubing shall not exceed the values given in Table3.
10.2Permissible variations in the wall thickness of the tubing shall not exceed610%for tubing having0.50in.(12.7 mm)or larger nominal outside diameter or more than615% for tubing having a smaller nominal outside diameter.
11.Workmanship,Finish,and Appearance
11.1Finished tubes shall be free of scale but may have a superficial oxidefilm on the surfaces.
11.2Finished tubes shall be reasonably straight and have smooth ends free of burrs.Tubes shall have a workmanlike finish and shall be free of surface imperfections that cannot be removed within the allowable wall tolerances.Removal of surface imperfections,such as handling marks,straightening marks,light mandrel and die marks,shallow pits,and scale pattern,will not be required provided they are within the allowable tolerances.
11.3Finished tubes shall be protected both on the outside and the inside diameter to prevent corrosion in transit.If a corrosion preventive compound is applied,it shall be such that after normal storage periods it can be readily removed by cleaning.
12.Number of Tests
12.1One tension test,flaring test,flattening test,and hardness test shall be made on each lot of tubes.
13.Hydrostatic Proof Test
13.1Tubing supplied under this specification shall have been tested hydrostatically,with no evidence of failure or permanent deformation,at a pressure which will subject the material to a hoop stress of20000
psi(140MPa).Test pressures shall be determined as follows:
P5
2TS
D
where:
D=outside diameter of tubing,in.(mm),
P=hydrostatic pressure,psi(MPa),
S=allowable stress=20000psi(140MPa),and
T=minimum wall thickness of tubing,in.(mm).
13.2No tube shall be tested beyond a hydrostatic pressure of5000psi(35MPa),unless so specified on the purchase order.
14.Packaging and Package Marking
14.1Tubing shall be packaged or bundled in such a manner as to prevent damage in ordinary handling and transportation.
14.2Tubing shall be identified by a tag with the name of the manufacturer,purchase order number,specification designation,and size.
15.Keywords
15.1pressure-containing parts;seamless steel tube;steel tube;carbon
SUPPLEMENTARY REQUIREMENTS
The following supplementary requirement may become a part of the specification when specified in the inquiry or invitation to bid,and purchase order or contract.These requirements shall not be considered,unless specified in the order,in which event the necessary tests shall be made by the manufacturer prior to shipment of the tubing.
S1.Product Analysis
S1.1Product analysis shall be made by the supplier from one tube per heat of steel.If the original test f
or product analysis fails,retests of two additional lengths of tubes shall be made.Both retests shall meet the requirements of this specification for the elements in question;otherwise,all remaining material in the heat shall be rejected or,at the option of the producer,each length of tube may be individually tested for acceptance.Lengths of tubes which do not meet the requirements of this specification shall be rejected.
TABLE1Chemical Requirements Element Composition,%
Carbon0.18max.
Manganese0.27to0.63
Phosphorus0.048max.
Sulfur0.058max.
TABLE2Tensile Requirements
Tensile strength,min.,ksi(MPa)45(310) Yield strength,min.,ksi(MPa)25(170) Elongation,in2in.(or50mm),min.,%35 TABLE3Tubing Outside Diameter Tolerances
Nominal Tubing Outside Diameter A,in.Outside Diameter Tolerance,in.
Up to160.004
1to11⁄260.006
Over11⁄2to2,inclusive60.008
Over2to31⁄2,inclusive60.010
A The actual outside diameter shall be the average of the maximum and
minimum outside diameters as determined at any one cross-section through the tubing.
The American Society for Testing and Materials takes no position respecting the validity of any patent ri
editoriallyghts asserted in connection with any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,are entirely their own responsibility.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed everyfive years and if not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters.Your comments will receive careful consideration at a meeting of the responsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards,100Barr Harbor Drive,West Conshohocken,PA19428.

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